Gaming Handset Hi Mike,   I am using FRDM-K64F and FRDM-FXS-MULT2-B to test the new sensor fusion library V 7.00. I downloaded KSDK2.0 for FRDM-K64F and compile the sample code under "baremetal_mult2b" for sensor fusion. I downloaded the executable code to FRDM-K64F and works fine. When I am trying the gaming handset mode, the heading is keeping the change(0.2 degree per s) and it is almost the same as fusion V5.00 when it is stationary because of gyro drifting. I was told that you added the new function to avoid this in V7.00 and I am going to try it. Could you tell me if I need to set some threshold to avoid drifting when in stationary?   Thanks,   Christie SensorFusion Re: Gaming Handset Gaming handsets are taking innovation to the next level! Recently, I discovered an option to explore a specialized app download for enhancing gaming experiences. These apps focus on providing seamless performance, which is ideal for both casual and competitive gamers. A great way to improve mobile gaming capabilities! Re: Gaming Handset Christie, That feature is not part of the default build, but is easy to add.  It essentially just shuts down the fusion operation when the board is stationary.  I'll upload an alternate main() for you to use in another post momentarily.  See Section 4.8, Fusion Standby mode, in the user guide for a detailed discussion. Mike

KTY82の抵抗値は量産後に小さくなるものもある <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 親愛なる、 お客様に 20K 個の KTY82 を購入してもらい、そのうち約 4K 個に異常な抵抗値 (25 度の温度で約 0.2kΩ) があり、その他の正常な抵抗値は 25 度の温度で約 0.99Ω でした。お客様は 2015 年にこのデバイスを購入し、2 年後、プロトタイプ設計でこれらの異常な抵抗をテストしましたが、製品生産後にその値が以前よりも小さくなりました。この変化の原因は何ですか?それを手伝ってもらえますか？ありがとう。 Re: Some of KTY82 resistance change smaller after mass production <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> こんにちは、ハンソンさん。 抵抗値が低すぎる原因が KTY82 自体にある場合は、ESD によって損傷を受ける可能性があると思います。 このような失敗動作の他の原因はまだ見ていません。 よろしくお願いいたします。 トーマス

Some of KTY82 resistance change smaller after mass production Dear, We have customer buy 20Kpcs KTY82, and about 4Kpcs have the abnormal resistance value, about 0.2ko in 25 degree temperature, and other normal resistance value is about 0.99o in 25 degree temperature. Customer buy this device in 2015, after two years, they have tested these abnormal resistance in prototype design, but after product production, its value change to smaller than before, what make this change? could you help for it? Thanks. Re: Some of KTY82 resistance change smaller after mass production Hi Hanson, if it is the KTY82 itself, that is causing the too low resistance, then I think it could be damaged by ESD. Other causes of such a failure behavior I have not seen yet. Best regards, Tomas

accelerometer results while driving a robot Hello,   I've tried to calculate the speed of a robot while in movement, by measuring the acceleration(by using MMA7361LC). I've tested the accelerometer and it gives good results when moving it (forward, backward) and when checking if it measures the gravity. Even when it is fixed to the robot(tank), if I'm moving the robot by hand - works well. The problem is that while driving the robot with it's wheel motors - I'm not able to get reasonable results at all. From the beginning I'm getting the same oscillations until the robot stops - that I can very barely analyze where there was a positive or negative acceleration, and the noise is very high, even after a 70Hz simple LPF.   I don't understand why when the robot is in movement(by the wheel motors) I don't get something close to a straight line?   In the attached files: Green - the positive driving axis, before the LPF. Orange - the positive driving axis, after the LPF. scope_3 - a low acceleration(for about 0.5 seconds), a fixed velocity, and then a low negative acceleration(for about 0.5 seconds). scope_4 - same, with a higher acceleration in the start and in the end.   Please help. Thanks, Dror. SensorFusion Re: accelerometer results while driving a robot Dror, I hate to tell you this, but your basic premise is flawed.  Trying to get velocity/position by single/double integration is almost always a bad idea. Problem #1 is that every sensor has noise, and when you integrate noise, you get a random walk over time.  See Position Reckoning for more details. Problem #2 is that one man's signal is another man's noise and vice versa.  I'm pretty sure you are seeing vibrations from your robot's motor and gear train. You would be better off with a rotary encoder for this application to determine speed/distance.   Fusion of accel/gyro data can give you your robot's orientation and linear acceleration, but if you need accuracy in velocity and position, you should look at other sensor types. Mike

Question- MMA8451Q Hello, I have a party looking for Altium cad files for symbol for schematic and foot print. Thx Tim Q Accelerometers Re: Question- MMA8451Q Unfortunately we don’t have the Altium CAD source files for symbol schematic and footprint, however, I can share some pdf files with the requested information, please find them attached.  I hope this could be helpful. Regards, Jose

MC33771C ADC値（13/14ビット分解能） Hello MC33771C を使用してバッテリー セルを監視するプロジェクトがあります。 データシートには、ADC 解像度は ADC_CFG(0x06) レジスタによって 13 ～ 16 ビットにプログラムできると記載されています。 セル電圧レジスタ MEAS_xxxx(0x32~0x4A) は 15 ビットであり、ADC 解像度が変換時間とノイズに影響することはわかっています。 ADCの解像度を13ビットに変更してMEAS_xxxxの値を読み取ろうとします。MEAS_xxxx=0x2324、ADC 解像度を 15 ビットに設定するとほぼ同じ値が返されます。 それで、値が 0x2324/4 = 0x8C9 にならないのはなぜでしょうか? この質問を理解するのを手伝ってください。ありがとうございます。 Re: MC33771C ADC value in 13/14 bit resolution こんにちは、トーマス 早急なご返信ありがとうございます。 SO、解像度を 13 ビット、14 ビット、または 16 ビットに変更しても、結果は常に 15 ビットになるということですね? 解像度を 13 ビットに設定した場合、ADC の結果はどのようにして 15 ビットに拡張されるのでしょうか? Re: MC33771C ADC value in 13/14 bit resolution こんにちは、梁さん。 ADC1_A/B 変換値は、ADC_CFG で選択された解像度とは無関係です。 のために ADC1 CT/ANx の計算式は次のとおりです。 V = MEAS_XXX[14..0] * VCT_ANx_RES 疑似コード（1セルのみ）: レジスタ読み取り (MEAS_CELL1) rawVoltage = MEAS_CELL1 & 0x7FFF // DATA_RDYビットを削除 電圧 = rawVoltage * VCT_ANx_RES / 1000000 // 電圧をV単位で計算/スケーリング 例： VCT_ANx_RES = 152.58789 μV/LSB、MEAS_CELL1[15..0] = 0xDECDの場合 MEAS_CELL1[14..0] = 0x5ECD = 24269 V = 24269 * 152.58789 = 3703155 μV = 3.703155 V 解像度の影響は、実際には取得および変換時間のノイズにのみ影響します。 BR、トーマス

SPI transmission Issue in MM9Z1_638 battery sensor HI     i am working mm9z1-638 battery sesnor.I need to interface the SPI with external flash which supports SPI communication.I found the sample SPI demo code, with that i can able to read the standard registers(Manufacturer id and device id) of flash memory properly.If i want to write some bytes of information in the particular address then it is not happening.So i want to know the reason about the issue.Below i am attaching the two APIS i am using for transfer the data through SPI. void SPIInit(void) { SPICR1_LSBFE =0; //MSB first SPICR1_SSOE = 0; //SSb enabled SPICR1_CPHA = 0; //Mode 1 SPI SPICR1_CPOL = 0; //Mode 1 SPI SPICR1_MSTR = 1; //Master mode SPICR1_SPTIE = 0; //SPTEF Interrupt disabled SPICR1_SPIE = 0; //SPI interrupt disabled (use polling) SPICR2_XFRW = 0; //16-bit data width SPICR2_MODFEN =0; //SSb enabled SPICR2_BIDIROE = 0; //Normal mode SPICR2_SPISWAI = 1; //Stop SPI clock in Wait mode SPICR2_SPC0 = 0; //Normal mode SPIBR = 0x00; //4Mbit/s baud rate for 32MHz bus clock : MC33879 recommended baud rate //SPISR=0x00; } this the configuration i did for the SPI with master mode. u16 SPITransfer16bit2(u8 u16Data) this the API i am using for transmitting the data. please give me the reason for the issue and suggest me how to over come the issue. Re: SPI transmission Issue in MM9Z1_638 battery sensor Hi, if you are able to read the external SPI flash then you have also to be write to it. Standard suggestion is to put all signals to the scope and check whether I can see communication in the form which is expected by device I communicate with. You really have to check communication protocol and timing by scope and compare it with requirement given by flash memory datasheet. Best regards, Ladislav

MMA690xKQ interface sample codes Hi any one share sample code of MMA690xKQ interface sample codes Accelerometers Re: MMA690xKQ interface sample codes Hi Tomas Thanks for the reply I was tried with same example aswell pelase find tehresponses attached Always I am getting E6,BC,00... Re: MMA690xKQ interface sample codes mcm_internal_get_srv_id_for_msg_id: *** msg_id: 600 | MIN: b00 | MAX: b10 mcm_internal_get_srv_id_for_msg_id: *** msg_id: 600 | MIN: 100 | MAX: 10c mcm_internal_get_srv_id_for_msg_id: *** msg_id: 600 | MIN: 400 | MAX: 427 mcm_internal_get_srv_id_for_msg_id: *** msg_id: 600 | MIN: 300 | MAX: 316 mcm_internal_get_srv_id_for_msg_id: *** msg_id: 600 | MIN: 600 | MAX: 600 mcm_internal_get_srv_id_for_msg_id: found service_id iter:8 server_execute_sync: server_execute_sync Enter server_execute_sync: user_handle:7, msg_id:600, req_c_struct:e190, req_c_struct_len:208, resp_c_struct:e3a0, resp_c_struct_len:1010 mcm_client_execute_command_sync_ex: mcm_client_execute_command_sync_ex SUCCESS EXITAT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 13AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:emessage transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe600AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 14AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:fmessage transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 AT command sent: AT#V24=2,1OK rx_word-0xe6AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 15AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:10message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xff-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6ff ptr_read[index].word-0xe6ff index - 16AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:11message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 17AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbcAT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xff-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6ff ptr_read[index].word-0xe6ff index - 18AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:21message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 19 AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:22message transmittedspi read message successfullSTATUS is 0xff-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6ffAT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6 ptr_read[index].word-0xe6e6 index - 20AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:23message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6 ptr_read[index].word-0xe6e6 index - 21AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0xff-0x00-0x00-0x00 register address:24message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xffbcAT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6 ptr_read[index].word-0xe6e6 index - 22 AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:25message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6 AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 23AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:26message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6 AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6 ptr_read[index].word-0xe6e6 index - 24AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:27message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbcAT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00 ptr_read[index].word-0xbc00 index - 25 AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0x00AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xff-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6ff ptr_read[index].word-0xe6ff index - 26AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:24message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6 XL AXIS - 230AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:25message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe600 XH AXIS - 58880AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc00AT command sent: AT#V24=2,0OK register address:14message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:26message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc YL AXIS - 188AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0xe6-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xe6e6AT command sent: AT#V24=2,0OK register address:10message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00 register address:27message transmittedspi read message successfullSTATUS is 0xbc-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xbc YH AXIS - 188AT command sent: AT#V24=2,0OK register address:20message transmittedspi read message successfullSTATUS is 0xff-0x00-0x00-0x00 register address:0message transmittedspi read message successfullSTATUS is 0x00-0x00-0x00-0x00AT command sent: AT#V24=2,1OK rx_word-0xff00 X AXIS - 0 Y AXIS - 58880 X AXIS - 58880-230 Y AXIS - 188-188 mma6900->w_regs -  0 last_write -  0 X AXIS - 0 Y AXIS - 58880 X AXIS - 58880-230 Y AXIS - 188-188 Re: MMA690xKQ interface sample codes Hi Jaya, The only example code I am aware of is part of the TWR_SENSOR_AUTO_FW package that can be downloaded from the following website: Automotive Low-g Accelerometer Tower® Plug-In|NXP  Scroll down to the bottom of the page and download the TWR_SENSOR_AUTO_FW.zip file. I hope it helps! Best regards, Tomas

what is the superset part for MPX5700AP what is the superset part for MPX5700AP ...in order to place an sample order request ? Regards Som Pressure Sensors Re: what is the superset part for MPX5700AP Hi Somnath, Use the following website to order MPX5700AP samples: 0 - 700kPa Integrated Pressure Sensor|NXP  Best regards, Tomas

如何使用 SDK 2.1 将变量写入 MMA8451 寄存器？ <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 你好，我想向 MMA8451 中的阈值寄存器写入一个可变值。使用 SDK 2.1。寄存器写入驱动程序都设置使用常量。例如，要写入 CTRL_REG1，就需要完成所有这些操作： // RegisterWriteList 中的每个条目包括：寄存器地址、要写入的值、应用于写入的位掩码（0 使能） const registerwritelist_t MMA845x_IDLE[] = { { MMA845x_CTRL_REG1, 0x00, 0x01 }, __END_WRITE_DATA__ }； int8_t MMA845x_Idle(struct PhysicalSensor *sensor, SensorFusionGlobals *sfg) { int32_t status； if(sensor->isInitialized == F_USING_ACCEL) { status = Sensor_I2C_Write(sensor->bus_driver,&sensor->deviceInfo, sensor->addr, MMA845x_IDLE ); sensor->isInitialized = 0; sfg->Accel.isEnabled = false; } else { return SENSOR_ERROR_INIT; } return status; } 一旦你完成了这一切，你就可以使用它了： global_I2C_status = MMA845x_IDLE(&(sensors[0]),&sfg)； 上述方法对于编写常量也很有效。不过，我想写一个变量。谁能好心帮帮我？我很怀念过去的美好时光，WriteI2CByte_MMA8451(MMA8451_CTRL_REG1,0x06)之类的命令就能起作用，但我找不到类似的简单命令。 顺祝商祺！ Mark Re: How to write a variable to a MMA8451 register using SDK 2.1? <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 没关系。最后，我只定义了 5 个常量作为阈值，并使用了这些常量。 感谢您的阅读！ Mark

FXLN8361Q 问题 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 我使用的是 FXLN8361Q 芯片，但是当我完成 PCB 板并焊接芯片时，我发现 3 轴的输出电压与数据表不一样。数据表中显示的电压约为 0.75V，而实际电压约为 1.2V。您能告诉我问题出在哪里吗？谢谢。 加速度传感器 Re: FXLN8361Q Problem <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 您好， 至少在不知道电路图的情况下，很难说问题出在哪里。您能在这里分享一下吗？ 您的电源电压是多少？ BYP 引脚的电压是多少？是 1.5 伏吗？ EN 引脚的电压是多少？ 您测试了多少个部件？ 您在多少个部件上观察到了这种错误读数？ 你是如何焊接它们的？ 掌握更多信息后，我们将能提供更准确的答案。 此致， 托马斯 PS： 如果我的回答有助于解决您的问题，请标记为"正确" 或 "有帮助"。谢谢。 Re: FXLN8361Q Problem <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 可能是焊接过程造成的。你能分享一下条件吗？ 关于焊接规格。对于 FXLN8361Q，请查看产品摘要页面的 "环境与合规信息"部分 http://www.freescale.com/webapp/search.partparamdetail.framework?PART_NUMBER=FXLN8361QR1&lang_cd=

MPX5700センサー、耐水性 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> ハイ MPX5700 センサーを使用して冷水圧力 (50 ～ 75F) を感知するつもりです。データシートには、センサは乾燥空気に対してのみテストされていると記載されていますが、水分検知アプリケーションでこのセンサを 1 年以上使用したことがある人はいますか? 圧力センサ Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> こんにちは、ジョン。 この場合、MPX5700 には、ダイを過酷な媒体から保護するフルオロシリコーン ゲルが含まれています。 メディア耐性ゲル材料は、MPX5700 の MCD (材料組成宣言) に指定されています。詳細については以下をご覧ください。 材料組成宣言 - MPX5700 この情報が皆様のお役に立てれば幸いです。 ご質問を誤解していた場合は、遠慮なくお知らせください。喜んでお手伝いさせていただきます。 素晴らしい一日をお過ごしください。 デビッド Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> こんにちは、デビッド MPX5700 またはその他の互換性のあるフリースケール センサには、Media Resistan Gel が付属していますか? Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> こんにちは、ジョン。 提供されたドキュメントが役に立ったことを嬉しく思います。 確かに、空気柱内で媒体（この場合は水）の蒸発がいくらか発生しますが、ほとんどのアプリケーションでは、媒体耐性ゲルがここで適切な保護を提供します。 アプリケーションで 2 つの圧力ポイント間の差を測定する必要があるときに差圧を測定する必要があると、チューブの長さが問題になる可能性があります。センサーの片側は 1 つの圧力ポイントに接続され、もう片側は別の圧力ポイントに接続されます。 この情報があなたの質問への答えになったかどうかお知らせください。 ご質問を誤解していた場合は、遠慮なくお知らせください。喜んでお手伝いさせていただきます。 素晴らしい一日をお過ごしください。 デビッド Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> ありがとう、デイビッド 申込書を読みましたが、役に立ちました。 センサーと測定対象の水の間にエアチューブを使用する場合でも、チューブ内に閉じ込められた空気が常に水にさらされると、最終的に相対湿度が 100% 近くになり、センサー内に結露が発生する可能性があり、これはセンサーが「乾燥空気」にのみ対応していることと矛盾します。 閉じ込められた空気を含むチューブの長さは、測定される圧力に何らかの影響を及ぼしますか?あるいは、無限の長さの空気管に取り付けられたセンサーが水の圧力を正確に測定できると想定できますか? ありがとう、デビッド！ Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> こんにちは、ジョン。 実際、Freescale の標準圧力センサ製品は、乾燥した空気でのみ使用できるように認定されています。 乾燥空気以外の環境で圧力センサを使用する場合は、圧力センサ内の感知要素を保護するための追加の予防措置が必要になります。 通常、水測定アプリケーションでは、ヘッド チューブが使用されます。これは、水位または圧力を測定する必要がある容器とセンサーの間にある単純なチューブです。チューブ内に空気が閉じ込められ、センサーが液体の水から隔離されます。 提供された情報に加えて、考慮する価値がある次のアプリケーション ノートを参照したいと思います。 IPS PRT圧力センサーのメディア互換性 さらに、液体環境でデバイスを使用するためのアイデアを紹介するアプリケーション ノートもいくつかあります。また、次のリンクからアプリケーション ノートをダウンロードすることもできます。 1 - 圧力センサを使用した液面制御 2 - 水位監視 この情報が皆様のお役に立てれば幸いです。 ご質問を誤解していた場合は、遠慮なくお知らせください。喜んでお手伝いさせていただきます。 素晴らしい一日をお過ごしください。 デビッド・ディアス。

MPX5700 传感器，与水兼容 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> HI 我打算使用 MPX5700 传感器来感知冷水压力（50-75华氏度）。数据表上说传感器只在干燥空气中进行过测试，但是否有人将传感器用于水感应应用超过 1 年？ 压力传感器 Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 你好，约翰、 在这种情况下，MPX5700 含有氟硅凝胶，可保护芯片不受恶劣介质的影响。 MPX5700 的 MCD（材料成分声明）中规定了耐介质凝胶材料。更多信息，请访问 材料成分声明 - MPX5700 希望这些信息对你有用。 如果我误解了你的问题，请随时告诉我。 我很乐意提供帮助。 祝您有美好的一天。 戴维 Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 你好，戴维 MPX5700 或其他兼容的飞思卡尔传感器是否带有耐介质凝胶？ Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 你好，约翰、 我很高兴知道所提供的文件对您有用。 事实上，介质（在本例中为水）会在空气柱中发生一些气化，但对于大多数应用而言，耐介质凝胶可提供足够的保护。 如果需要测量压差，而应用要求测量两个压力点之间的差值，那么管子的长度可能会成为一个问题。传感器的一侧连接到一个压力点，另一侧连接到另一个压力点。 如果这些信息回答了您的问题，请告诉我。 如果我误解了你的问题，请随时告诉我。 我很乐意提供帮助。 祝您有美好的一天。 戴维 Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 感谢大卫 我阅读了申请表，它们很有帮助。 即使在传感器和被测水之间使用空气管，如果持续暴露在水中，管中的空气似乎最终会达到接近 100% 的相对湿度，传感器中可能会出现冷凝水，这与传感器只能与"干燥空气" 兼容相冲突。 含有滞留空气的导管长度对测量的压力有影响吗？还是说，可以假定一个连接在无限长的空气管上的传感器会准确测量出水的压力？ 谢谢你，大卫！ Re: MPX5700 sensor, water compatibility <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 你好，约翰、 事实上，飞思卡尔的标准压力传感器产品只能在干燥空气中使用。 在干燥空气以外的任何其他环境中使用压力传感器，都需要采取额外的预防措施，并保护压力传感器内部的传感元件： 在水测量应用中，通常使用头管。这只是传感器与需要测量水位或压力的容器之间的一根管子。空气被截留在管道中，从而将传感器与液态水隔离开来。 除了提供的信息外，我想参考以下应用笔记，值得考虑。 IPS PRT 压力传感器的介质兼容性 此外，您还会找到一些应用笔记，这些笔记为在液体环境中使用设备提供了一些想法，或者您可以从以下链接下载应用笔记： 1 - 使用压力传感器进行液位控制 2 - 水位监测 希望这些信息对你有用。 如果我误解了你的问题，请随时告诉我。 我很乐意提供帮助。 祝您有美好的一天。 戴维-迪亚兹

Cavity volume of MPL115A2 I am interested in the inherent cavity volume of the MPL115A2 barometric pressure sensor. Could you please tell me the volume? thanks, Best regards Pressure Sensors Re: Cavity volume of MPL115A2 Hello Felix, Thank you for the patience. I just received confirmation from the product engineer and, unfortunately, we do not have such information available. I apologize the inconvenience that this may cause. Have a great day, Paulina Re: Cavity volume of MPL115A2 Hello Felix, As per this kind of information is not characterized in any documentation, I’ve contacted the product engineer and waiting for feedback on this. This can take some time; I’ll get back to you as soon as possible. Have a great day, Paulina TIC ------------------------------------------------------------------------------- Note: - If this post answers your question, please click the "Mark Correct" button. Thank you! - We are following threads for 7 weeks after the last post, later replies are ignored Please open a new thread and refer to the closed one, if you have a related question at a later point in time. -------------------------------------------------------------------------------

Which sensor most suitable for my application? I am currently using MPX5500DP for a simple arduino car counter - it measures the change in pressure of a sealed tube when a car drives over it. The readings from MPX5500DP are not precise enough however; which sensor would I be able to get a more precise reading in ambient outdoor temperatures? Pressure Sensors Re: Which sensor most suitable for my application? Thank you for the quick reply! I'll give that a try. Re: Which sensor most suitable for my application? Hi, The MPX5500DP have a pressure measurement range from up to 500kPa, which, from my personal point of view, seems high for your kind of application. For more precision, I would recommend to use a smaller pressure range sensor so you can have higher voltage on the output when the car drives over the sealed tube. You can start testing using the MPX5100DP, which is a very similar sensor to the MP5500DP, but with smaller measurement pressure range (0 to 100kPa). MPX5100DP datasheet: https://www.nxp.com/docs/en/data-sheet/MPX5100.pdf Regards, Jose NXP Semiconductors

センサーフュージョンのメモリとフラッシュの要件 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 私は、Kinetis プラットフォームに似た CPU/フラッシュ/RAM を搭載したボードを使用しています。 48MHz ARM CPU、128KB フラッシュ、16KB SRAM しかし、オペレーティングシステムはその大部分を占めている 私のビルド (センサ Fusion ライブラリなし) では、次のメッセージが生成されます。 使用されたフラッシュ: 131072 バイト中 114033 バイト (87.0 %)。 使用された SRAM: 16384 バイト中 14144 バイト (86.3 %)。スタック: 2048 バイト。ヒープ: 1024 バイト。 残っているものは、センサ フュージョン e-Compass アルゴリズムを実行するのに十分ですか? よろしくお願い申し上げます。 アンディ Re: Memory and flash requirements for Sensor Fusion <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> こんにちは、アンドリュー。 私はセンサ フュージョンのプロジェクト FSFK-K64F を例として選択し、コンパイルすると次の結果が得られました。 テキストデータ bss 10進数 16進数 ファイル名 79244 64 20708 100016 186b0 FSFK_K64F.elf フラッシュ メモリや SRAM は、e-Compass アルゴリズムを実行するにはまったく不十分です。このコードはセンサの値をリアルタイムで表示する GUI を実行することを目的としているため、コードから必要なものだけを厳密に選択することをお勧めします。 ダリオ

fxas21002c： 校准 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> #fxas21002c #IIO   大家好，   我下面的校准值是否正确？   1.参见 FXAS21002C 数据表第 40 页、   #define FS_AVL_2000_GAIN 1090 #define FS_AVL_1000_GAIN 545 #define FS_AVL_500_GAIN 272 #define FS_AVL_250_GAIN 136     1090 是将 62500 转换为弧度的度数。我使用的是这个值，因为提到的灵敏度是 62.5 mdps/LSB。   静态 IIO_CONST_ATTR(in_gyro_scale_available,"0.0010900.000545 0.000272 0.000136"); ---> 这些是上述 #defines 的宏值   静态结构属性 *fxas2100x_attributes[] = { &iio_const_attr_sampling_frequency_available.dev_attr.attr、 &iio_const_attr_in_gyro_scale_available.dev_attr.attr、 NULL、 };   2.我使用的是 Android 6.1 Marshmallow 和下面的 hrec 文件。我根据对数据表的理解选择了一些数值，其余的数值是从另一个陀螺仪的数据表中复制的。选择的值是否正确？请提出正确的数值。 iio.anglvel.max_range=30-------------------------------> 抄自另一部分。 iio.anglvel.resolution=0.001-----------------------------> 这个值是我从灵敏度中提取的，因为上面提到是 mdps/LSB iio.anglvel.power=3------------> 抄自不同的陀螺仪 iio.anglvel.scale=0.000545-----> 我使用的增益微值 iio.anglvel.quirks=hrtimer嘈杂偏颇 iio.anglvel.max_freq=100---------------> 抄袭自一个不同的陀螺仪   此致， 甘加达 传感器融合 Re: fxas21002c: Calibration <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 你好，甘加达 我认为第一项是正确的。 第二项，我想是 HAL 中的代码，对吗？目前，我们还没有支持 IIO 框架的 HAL 代码。不同的供应商可能会以不同的方式编写 HAL。由于我们没有您的整个 HAL 代码，我无法判断这是否正确。 但有一点是，你已经在内核驱动程序中将陀螺仪输出转换为每秒弧度，那么分辨率的单位应该是每秒弧度，而不是 dps。 iio.anglvel.max_range=2000 // 如果范围单位是 dps iio.anglvel.max_freq=800 谢谢！ 永辉

pressure measurement i have to measure pressure of compressed air around 3- 4 bar, which is heated of 80 degree celsius. I have to fix this sensors on the cylinder, thatswhy i prefer sensors with some projections, I found two pf them,MPX5500DP or MPX5700AP/GP/GP1, which is better?, why MPX5500DP with two projections.? it represents one for vaccum? , am prefering MPX5700AP/GP/GP1, is there any problem for this to my application? Pressure Sensors Re: pressure measurement MPX5500DP or MPX5700AP/GP/GP1 both are similar in function with difference in max pressure range for 500 kPa and 700 kPa. The MPX5500DP comes in package CASE 867C with two ports so you may measure the difference between two applied pressures. In general when leaving the port P2 opened you will get the difference between applied pressure to port P1 compared to ambient air pressure left on port P2 and that is similar to the gauge pressure sensor. So when you take any other differential pressure sensor and left the port 2 at atmospheric pressure basically you have gauged pressure sensor. MPX5700DP comes with the same package as well. Gauge pressure sensors GP have only one port for inlet pressure the P1 post and then a small vented hole at the back of the sensor for the ambient pressure. Absolute pressure sensors have this hole sealed with precise reference pressure (vacuum) that is not changing. MPX5700GP1 has only the 90 degree lead form compared to GP version. The gauge sensor is sort of differential sensor where the pressure is measured compared to gauged side which is exposed to ambient air pressure without any specific geometry of port. Absolute = vacuum reference. Gauge = atm. pressure reference. So it depends on your design. You may also consider for instance MPX6400A that is absolute as well with different package up to 400 kPa with max temp. range of +125degC. The package you may see at following link: https://community.freescale.com/docs/DOC-98952 Vented Gauge package that we offer is measuring diff. pressure between applied – measured pressure and atm. pressure which is not sealed so the measured output would be difference between applied pressure and current atmospheric pressure at certain location. So form this definition it wouldn’t be the right choice for the application unless the ref. atm. Pressure side would be perfectly sealed. For gauge pressure sensor you can measure the over or under pressure compared to ref. atm. pressure. Gauge Pressure readings are a special case of differential measurements in which the pressure applied to the “Pressure” side is measured against the ambient atmospheric pressure applied to the “Vacuum” side through the vent hole in the chip of the differential pressure sensor elements. There is no internal reference, there is simply a hole on the back side of the part, so it is open to the ambient pressure. In the same respect, absolute pressure can also be considered a differential pressure where the measured pressure is compared to a perfect vacuum. It is not always straightforward when to use the absolute pressure sensor or when to use the gauge one but generally if you want to measure or control a pressure that is influenced by changes in atmospheric pressure, e.g. the level of liquid in an open tank or the output pressure of an air compressor; you would use a gauge pressure sensor since you are interested in the pressure reading minus the atmospheric pressure component. If there is a requirement to measure pressures that are not influenced by changes in atmospheric pressure, e.g. leak testing a completely sealed non-flexible container, you would use an absolute pressure sensor. If a gauge pressure sensor was used instead to measure the container pressure and the barometric pressure changed then the sensor’s reading would change despite the fact that the pressure in the container remains the same. In case of differential packaging the ref. side would need to be maintained on certain desired pressure to get the reading of the difference between the measured inlet and the reference inlet. In compare with the vacuum - absolute package you get readings directly the difference compared to sealed ref. vacuum side. An absolute pressure measurement is one that is referred to absolute vacuum. The best example of an absolute referenced pressure is the measurement of barometric pressure. In order to produce an absolute pressure sensor the manufacturer will seal a high vacuum behind the sensing diaphragm. Therefore if you hold open the process pressure connection of an absolute pressure transmitter to the air it will read the actual barometric pressure. Differential: Difference in pressure between two points is measured as pressure is applied to both sides of the die/sensing element. Gauge: Bottom side is exposed to the atmosphere, while pressure is applied to top of die. Absolute: Pressure is applied to the top of the die while the bottom of the die is a vacuum-sealed reference. A vented gauge pressure transmitter for example allows the outside air pressure to be exposed to the negative side of the pressure sensing diaphragm via a vented cable or a hole on the side of the device, so that it always measures with reference to the ambient barometric pressure. Thus a vented gauge reference pressure sensor reads zero pressure when the process pressure connection is held open to atmospheric air. A sealed gauge reference is very similar except that atmospheric pressure is sealed on the negative side of the diaphragm. This is usually adopted on high pressure applications such as measuring hydraulic pressures where atmospheric pressure changes will have negligible effect on the accuracy of the sensor so venting is not necessary. There is another way of creating a sealed gauge reference and this is to seal a high vacuum on the reverse side of the sensing diaphragm. Then by adjusting the electronics, the output signal is offset by 1 bar so the pressure sensor reads close to zero when measuring atmospheric pressure. A sealed gauge reference pressure transducer will never read exactly zero when left open to atmospheric air, because atmospheric pressure is always changing and the reference in this case is fixed at a nominal 1 bar. You may refer to AN1573, Understanding Pressure and Pressure Measurement for further information.

fxls8471q 传感器低通滤波器 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 我正在研究 fxls8471q 加速计，我们想实现 LPF 滤波器配置，但数据表中没有太多详细信息。有谁对 LPF 有想法？还有 HPF？ 加速度传感器 Re: fxls8471q sensor Low Pass Filter <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 您好， 不幸的是，除了数据表中提到的 LPF 或 HPF 之外，没有其他关于 FXLS8471 的 LPF 或 HPF 的详细信息，但是，有一份与 FXLS8471 非常相似的 MMA8451 应用笔记可以在其中找到有关这些过滤器的更多详细信息，可以在以下链接中找到此文档：https://www.nxp.com/docs/en/application-note/AN4071.pdf 此致， 何塞

When will NTM88K135 be mass-produced? I would like to know if the NTM88K135 has been mass-produced, and if not, when will it be mass-produced? Re: When will NTM88K135 be mass-produced? Understand,did you contact with local NXP distributor? Re: When will NTM88K135 be mass-produced? NTM88h135 is already MP Re: When will NTM88K135 be mass-produced? 1.customer name/location: siming/ningbo 2.in development 3.500k/y Re: When will NTM88K135 be mass-produced? Please fill below : 1: customer name/location 2: project schedule 3: volume/annual