Is IMX8M Plus using WDQS? Hi all, I am confirming whether the IMX8M Plus has the WDQS function enabled? I checked the RPA excel file, but I don't understand clearly. Can you confirm this for me? 1. If it is enabled then, use Mode 1 or Mode 2 as shown below (From DDR datasheet) 2. In the RPA file, where can Enable/Disable be confirmed? Thanks, i.MX 8 Family | i.MX 8QuadMax (8QM) | 8QuadPlus i.MX 8M | i.MX 8M Mini | i.MX 8M Nano Linux Re: Is IMX8M Plus using WDQS? Hi, @haryanl  Yes! You are right! B.R Re: Is IMX8M Plus using WDQS? Hi @pengyong_zhang , Thank for your reply. in the RPA file, is it confirmed here? By default it is set to enabled Because WDQS_Extension is used, is it correct that I understand that corresponds to DDR Mode 2: WDQS_on / WDQS_off definition based control? Thanks, Re: Is IMX8M Plus using WDQS? Hi, @haryanl  on i.MX8MP, we enable the WDQSEXTENSION feature of the DDR PHY whose description is as follows: When set, DQS_T and DQS_C will be driven differentially to 0 and 1, respectively, before and after a write burst, except during a memory read transaction. From that I understand that DQS should be driven low at all times except a memory read transaction. Here is measured the behavior of the system on 8MP EVK when WDQSEXTENSION is enabled and disabled:

診断にCLK2を使用 こんにちは 私は自分のプロジェクトにLPC1823コントローラーを使用しています。システム周波数が正しく設定されているかどうかを確認したいので、CLK2 を CLKOUT に設定して、周波数がオシロスコープに表示されるようにする必要があります。CLK2をCLKOUTとして設定して、システム周波数を確認できるようにしていただけますか。 Re:診断にCLK2を使用 こんにちは @Harry_Zhang  ご指導いただきありがとうございます、試してみて、今では周波数を見ることができました。クロック周波数を 1MHz に設定する方法や、CLK2 を 1MHz に設定する方法、またはそのためのサンプル コードを送ってください。

Create frame buffer without hdmi device Processor: iMX8M System: Yocto with Wayland  I would like to play video immediately after the system starts. However, I encounter a problem when the HDMI cable isn't connected during system startup. In this situation, a frame buffer isn't created, which is correct in the normal situation. I can't start playing such situation.  Is there any way to create a frame buffer with specified resolution without detecting the HDMI device? The approach should continue to play the video after connecting the cable on a compatible screen. Graphics & Display i.MX 8M | i.MX 8M Mini | i.MX 8M Nano Linux Multimedia Yocto Project Re: Create frame buffer without hdmi device Hello, Unfortunately no, for video to continue to be played needs a sink (display). Best regards/Saludos, Aldo.

使用 CLK2 进行诊断 你好 我的项目使用 LPC1823 控制器。我想验证系统频率是否设置正确，因此我需要将 CLK2 设置为 CLKOUT，以便在示波器上可以看到频率。您能指导我将 CLK2 设置为 CLKOUT 吗，以便我可以看到其上的系统频率。 回复：使用 CLK2 进行诊断 你好@Harry_Zhang 谢谢您的指导，我试过了，现在可以看到频率了。请告诉我如何将时钟频率设置为 1MHz 以及如何配置 CLK2 以查看 1 MHz，或者向我发送任何示例代码来执行此操作。

imx8mp 編譯 rtl8852be driver 產生的問題 Hi 我這裡使用 imx8mp 要在 yocto BSP 中加入 RTL8852BE Driver  driver 來源使用壓縮包方式附加在，我創建的 rtl8852be-wifi-linux_01.bb 使用bitbake 編譯 但編譯時，系統log回應 kernel source " No such file or directory. Stop." ?? 我創建的.bb檔與 error log 於附件中 i.MX 8M | i.MX 8M Mini | i.MX 8M Nano Linux Yocto Project Re: imx8mp 編譯 rtl8852be driver 產生的問題 我自己找到問題了，原因是 oe_runmake 不能用 -C build code 後的路徑 會擾亂 bitbake 動作 原本Linux 編譯很自然就是使用 make -C /xxx/build modules 結果 bitbake 它會看不懂該如何編程。 Re: imx8mp 編譯 rtl8852be driver 產生的問題 在编译这个之前有编译过内核吗？ 我看下面这个路径在编译完内核后是存在得。 build8mp/tmp/work-shared/imx8mp-lpddr4-evk/kernel-source

FP92 p119.288W8997、88W8987のFWクラッシュ、txpower.binファイルが含まれている場合、WiFiを起動するとクラッシュします。 HW:i.mx8mmまたはi.mx8mp、+ AW-CM358(88w8987)またはMurata 1YM(88W8997) ソフトウェア:SDK 6.6.3 Wi-Fiの場合: NXP EVKボードを試した i.MX8ミリメートル PCIE8997--16.92.21.p119.2-MM6X16437.p3-GPL-(FP92) SD8987----16.92.21.p119.2-MM6X16437.p3-GPL-(FP92) お客様側: i.mx8mpカーネル:5.x SD8997 ---- 16.92.21.p119.2-16.92.21.p119.2-MM6X16437.P3-GPL 参照バージョン: 試みた i.MX8mm 6.1.22 SD8987----16.92.21.p76.5-MM5X16391.p3-GPL-(FP92) PCIE8997--16.92.21.p84.4-MM5X16391.p3-GPL-(FP92) このバージョンでは問題ありません。 ステップス： 1. conf を txpower bin に変換します (UM11490 を参照)。 ./mlanutlmlan0 hostcmd txpwrlimit_cfg_8987.conf generate_raw txpower.bin 又は ./mlanutlmlan0 hostcmd txpwrlimit_cfg_8997.conf generate_raw txpower.bin OK:この行なし:txpwrlimit_cfg = nxp / txpower.bin NOK(ロードtxpower.bin直後のFWクラッシュ):この行を追加txpwrlimit_cfg=NXP/txpower.bin /lib/firmware/nxp/wifi_mod_para.conf にあります。 そして、 modprobe moal mod_para=nxp/wifi_mod_para.conf dmesg後のFWクラッシュ txpwrlimit_cfg=NXP/txpower.bin ログ共有: NOKログ: 663_p1192_8987_fail.txt 663_p1192_8997_fail.txt OK ログ: 663_p1192_8987_ok_noPwr.txt 663_p1192_8997_ok_noPwr.txt 6122_i.mx8mm_8987.txt 6122_p844_i.mx8mm_8997_noPwr_ok.txt 6122_p844_i.mx8mm_8997_withPwr_ok.txt お客様は、必要に応じてログを共有できます。 p119.2以降に手順を変更する必要があるかどうかを確認してください 感謝。 日時:FP92 p119.288W8997、88W8987のFWクラッシュ、txpower.binファイルが含まれている場合、WiFiを起動するとクラッシュします。 ログを追加します。 カスタマーボード:i.mx8mpプラットフォーム ソフトウェア:BSP 5.15.129 WiFiバージョンSD8997 ---- 16.92.21.p119.2-16.92.21.p119.2-MM6X16437.P3-GPL-(FP92) モジュール:ムラタ 1YM 添付されたログ。 Logs.zip 日時:FP92 p119.288W8997、88W8987のFWクラッシュ、txpower.binファイルが含まれている場合、WiFiを起動するとクラッシュします。 さらに情報を追加します。 設定されている場合 ps_mode=2 auto_ds=2 同じ結果が得られました。 日時:FP92 p119.288W8997、88W8987のFWクラッシュ、txpower.binファイルが含まれている場合、WiFiを起動するとクラッシュします。 続き。

BGA球的组成 想要了解 MPN：MPC5200CVR400B 的 BGA 球组合。相关数据共享将会更有帮助。 开发板 回复：BGA球成分 谢谢你的信息

アイドル状態MC33771C こんにちは、電源投入後(CSBアクティビティなし、VCOMが固定されているのを見ました)、6mAを消費しMC33771C。アイドル状態になるべきではありませんか? ありがとうございます！

MC33771C空闲状态 你好，上电后（没有 CSB 活动，我看到 VCOM 固定在其上）MC33771C 消耗 6mA。它不应该进入空闲状态吗？ 谢谢！

BGA ball composition Want to understand the BGA ball combination for the MPN:MPC5200CVR400B. Relevant data sharing will be more helpful. Development Board Re: BGA ball composition Thanks for the info Re: BGA ball composition Hello, These information are available on our web page: https://www.nxp.com/webapp/chemical-content/MPC5200CVR400B.html#eu Best regards, Peter

FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. HW: i.mx8mm or i.mx8mp, + AW-CM358 (88w8987) or Murata 1YM (88W8997) SW: SDK 6.6.3 WiFi: Tried NXP EVK board i.mx8mm PCIE8997--16.92.21.p119.2-MM6X16437.p3-GPL-(FP92) SD8987----16.92.21.p119.2-MM6X16437.p3-GPL-(FP92) Customer side: i.mx8mp kernel: 5.x SD8997 ---- 16.92.21.p119.2-16.92.21.p119.2-MM6X16437.P3-GPL Ref version: Tried  i.mx8mm 6.1.22 SD8987----16.92.21.p76.5-MM5X16391.p3-GPL-(FP92) PCIE8997--16.92.21.p84.4-MM5X16391.p3-GPL-(FP92) No issue on this version. Steps: 1. Convert conf to txpower bin by (refer to UM11490) ./mlanutl mlan0 hostcmd txpwrlimit_cfg_8987.conf generate_raw txpower.bin or ./mlanutl mlan0 hostcmd txpwrlimit_cfg_8997.conf generate_raw txpower.bin OK:  without this line: txpwrlimit_cfg=nxp/txpower.bin NOK(FW crash just after load txpower.bin): add this line txpwrlimit_cfg=nxp/txpower.bin in /lib/firmware/nxp/wifi_mod_para.conf and then bring up by modprobe moal mod_para=nxp/wifi_mod_para.conf FW crash after dmesg txpwrlimit_cfg=nxp/txpower.bin Logs share: NOK logs: 663_p1192_8987_fail.txt 663_p1192_8997_fail.txt OK logs: 663_p1192_8987_ok_noPwr.txt 663_p1192_8997_ok_noPwr.txt 6122_i.mx8mm_8987.txt 6122_p844_i.mx8mm_8997_noPwr_ok.txt 6122_p844_i.mx8mm_8997_withPwr_ok.txt Customer can share their logs if needed. Please help check if the procedure need to be changed after p119.2  Thanks. Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Hi, @NancyHuang  We have standalone release completed and available on the nxp.com with secure sign in. Can you please check if this link can be accessible to you for the Q2 release? Below link is for 88W8987: https://www.nxp.com/webapp/sps/download/license.jsp?colCode=SD.GEN.16.92.21.p119.3-MM6X16437.P21-GPL&appType=file1&DOWNLOAD_ID=null Below link is for 88W8997: Generic_SD-WLAN-UART-BT-8997-LNX_6_6_23-IMX8-16.92.21.p119.3-16.92.21.p119.3-MM6X16437.P21-GPL Generic_PCIE-WLAN-UART-BT-8997-LNX_6_6_23-IMX8-16.92.21.p119.3-16.92.21.p119.3-MM6X16437.P21-GPL  If this is not accessible, then you may need to use Q2 (end of June) release available via i.MX BSP or Github release.   Thanks, Christine. Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Hi @Christine_Li  Thanks for your reply. Could you tell us when the new firmware will be available? 6/28? Nancy Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Hi, @yao_feng  I received our internal team feedback as below: The reported issue is a regression issue and it is fixed already. We have verified the changes on our local setup and it is working fine. The release with the fixes will be available in Q2 (end of June).  Please help to update this info to our end customer and request them to verify on the Q2 release. Thanks. Best regards, Christine. Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Hi, @yao_feng  We are able to observe FW crash/Kernel panic as below on our local setup:   Message from syslogd@imx8mpevk at Wed Sep 20 11:32:59 2023 ... kernel: Internal error: Oops: 0000000096000007 [#1] PREEMPT SMP Message from syslogd@imx8mpevk at Wed Sep 20 11:32:59 2023 ... kernel: Code: 91000f9c 1100077b 6b1b029f 54001a0b (38401743) [ 244.448042] Timeout cmd id (244.444015) ??? [0xecf], act = 0x0   We are checking internally for further debugging the issue. We will update you soon. Best regards, Christine. Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Hi， @yao_feng  Thanks for creating case to us. Yes, I can also reproduced locally, and I am checking internally. Once have any updates, I will let you know. Best regards, Christine. Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Add logs. Customer board: i.mx8mp platform SW: BSP 5.15.129 WiFi version SD8997 ---- 16.92.21.p119.2-16.92.21.p119.2-MM6X16437.P3-GPL-(FP92) Module: Murata 1YM Attached logs. Logs.zip Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. Add more info. if set ps_mode=2 auto_ds=2 Got same result. Re: FP92 p119.2 FW crash of 88W8997, 88W8987 when bring up WiFi if txpower.bin file included. cont.

Using lax_codegen with enable dynamic memory allocation Hello to the mbd community I am currently exploring the NXP_MBDToolbox_LAX. The code generated by lax_codegen is based on static allocation. I'd like to manage large vectors, how do I enable dynamic memory allocation with LAX_CODEGEN? Thank you in advance. Best regards, OPSofiane Re: Using lax_codegen with enable dynamic memory allocation Hello @OPSofiane , We have released a new version of MBDT for LAX toolbox, now renamed to MBDT for RADAR v1.0.0, at the end of 2024. You can find the release announcement here: NXP Model-Based Design Toolbox for RADAR - version 1.0.0 - NXP Community Based on your encountered problem we have included an example that multiplies large matrices, found in LAX_Examples\basic\multiplication\mul_large_matrix folder, and which also showcases how to transfer chunks of matrices via DMA. It's been a while since our lost message, but if you are still interested in using our toolbox, please download the latest version of MBDT for RADAR toolbox and check our mul_large_matrix example. Regards, Paul Re: Using lax_codegen with enable dynamic memory allocation Hello @paul, Here is an example of multiplication of two matrices: A(9216x600) and B(600 X1024). the block matrix multiplication can be a solution however I need to reduce the time transfere to and from Lax. Regarding DMA, I need an example to understand and follow its application. Best regards, @OPSofiane Re: Using lax_codegen with enable dynamic memory allocation Hello @OPSofiane , All vectors/matrices in the LAX graph are statically allocated. It would be difficult, maybe impossible, to implement dynamic allocation from the MATLAB code. Could you tell as the approximate size of your vectors? If your algorithm allows you can execute multiple times the LAX graph on chunks of your vectors. Another option, not supported in our toolbox but it is in the Radar SDK, is to use DMA inside the LAX graph to transfer chunks of matrices/vector and process them. Check my answer also to your previous question posted here:https://community.nxp.com/t5/Model-Based-Design-Toolbox-MBDT/SER45-LAX-memory/m-p/1878230#M9150 Regards, Paul

FP92 p119.2如果包含 txpower.bin 文件，则在启动 WiFi 时，88W8997、88W8987 的 FW 会崩溃。 硬件：i.mx8mm 或 i.mx8mp，+ AW-CM358 (88w8987) 或 Murata 1YM (88W8997) 软件：SDK 6.6.3 无线上网： 尝试过 NXP EVK 板 i.mx8mm PCIE8997--16.92.21.p119.2-MM6X16437.p3-GPL-(FP92) SD8987----16.92.21.p119.2-MM6X16437.p3-GPL-(FP92) 客户方： i.mx8mp内核：5.x SD8997----16.92.21.p119.2-16.92.21.p119.2-MM6X16437.P3-GPL 参考版本： 尝试过 i.mx8mm 6.1.22 SD8987----16.92.21.p76.5-MM5X16391.p3-GPL-(FP92) PCIE8997--16.92.21.p84.4-MM5X16391.p3-GPL-(FP92) 此版本没有问题。 步骤： 1. 将conf转换为txpower bin（参考UM11490） ./mlanutlmlan0 hostcmd txpwrlimit_cfg_8987.conf 生成原始文件 txpower.bin 或者 ./mlanutlmlan0 hostcmd txpwrlimit_cfg_8997.conf 生成原始文件 txpower.bin 确定：没有此行：txpwrlimit_cfg=nxp/txpower.bin NOK（加载 txpower.bin 后固件崩溃）：添加此行 txpwrlimit_cfg=nxp/txpower.bin 在/lib/firmware/nxp/wifi_mod_para.conf中 然后提出 modprobe moal mod_para=nxp/wifi_mod_para.conf dmesg 之后 FW 崩溃 txpwrlimit_cfg=nxp/txpower.bin 日志共享： NOK日志： 663_p1192_8987_失败.txt 663_p1192_8997_失败.txt 正常日志： 663_p1192_8987_ok_无电源.txt 663_p1192_8997_ok_无电源.txt 6122_i.mx8mm_8987.txt 6122_p844_i.mx8mm_8997_无电源_ok.txt 6122_p844_i.mx8mm_8997_带电源_ok.txt 如果需要，客户可以分享他们的日志。 请帮忙检查 p119.2 之后的程序是否需要更改 谢谢。 回复：FP92 p119.2如果包含 txpower.bin 文件，则在启动 WiFi 时，88W8997、88W8987 的 FW 会崩溃。 添加日志。 客户板：i.mx8mp平台 软件：BSP 5.15.129 WiFi版本SD8997 ---- 16.92.21.p119.2-16.92.21.p119.2-MM6X16437.P3-GPL-(FP92) 模块：Murata 1YM 附加日志。 日志.zip 回复：FP92 p119.2如果包含 txpower.bin 文件，则在启动 WiFi 时，88W8997、88W8987 的 FW 会崩溃。 添加更多信息。 如果设置 ps_mode=2 自动_ds=2 得到了相同的结果。 回复：FP92 p119.2如果包含 txpower.bin 文件，则在启动 WiFi 时，88W8997、88W8987 的 FW 会崩溃。 续

S32DS 3.4のオンラインアクティベーションに失敗しました こんにちは。個人用アクティベーションコードを使用して、ノートパソコンにS32DSをインストールし、アクティベートしました。次にデスクトップパソコンにソフトウェアをインストールする必要があるのですが、オンラインでアクティベートしようとすると、「指定された数量が最大数量(0)を超えています」というメッセージが表示されます。(FNPエラー0)

您好，是否可以获取 TJA1443 CAN PHY 的 FMEDA 信息？ 您好，是否可以获取 TJA1443 CAN PHY 的 FMEDA 信息？

How to receive partial bytes I am attempting to select a certain card UID by sending the command {0x93, 0x23} for example, in order to send the first three bits of a UID. The issue is that the PICC responds with the first three bits of the first byte cut off. So far, I was unable to read the response, since the parity calculation causes issues. Turning parity off gives reception errors, while turning it on introduces ones and zeroes into the result, while parsing some data bytes as parity. In any case, is there a way to tell the PN5180 to start the reception by skipping a few bits?  Thanks! Daniel Contact Smart Card Reader ICs Re: How to receive partial bytes got it.  CRC_RX_CONFIG->RX_BIT_ALIGN does the job.

LS1046ARDB上的DDR监视器 嘿，团队， 我正在尝试检查自定义用户空间应用程序运行时的 ddr 性能。 我有两个问题： 1）ls1046ardb 是否有类似“i.MX8 DDR 性能监控单元 (PMU)”的 ddr pmu？ 2）如何在 ls1046ardb 上检查 DDR 带宽使用情况 顺祝商祺！ 斯凯勒。 回复：LS1046ARDB 上的 DDR 监视器 1. LS1046ARDB 没有ddr pmu。 2.您可以考虑CodeWarrior中提供的场景工具。

S32K314's SRAM is overflow Hi,@NXP Appears when compiling a project with S32DS for S32 platform“Description Resource Path Location Type Ld error: region `int_sram' overflowed by 417616 bytes S32K314OFBCU C/C++ Problem(IC S32K314)” .ld HEAP_SIZE = DEFINED(__heap_size__) ? __heap_size__ : 0x00002000; __STANDBY_RAM_LIMIT_END = 0x20407FFF; /* 32Kbyte for standby ram */ ENTRY(Reset_Handler) MEMORY { int_pflash : ORIGIN = 0x00400000, LENGTH = 0x003D4000 /* 4096KB - 176KB (sBAF + HSE)*/ int_dflash : ORIGIN = 0x10000000, LENGTH = 0x00020000 /* 128KB */ int_itcm : ORIGIN = 0x00000000, LENGTH = 0x00008000 /* 32KB */ int_dtcm : ORIGIN = 0x20000000, LENGTH = 0x0000F000 /* 60KB */ int_stack_dtcm : ORIGIN = 0x2000F000, LENGTH = 0x00001000 /* 4KB */ int_sram : ORIGIN = 0x20400000, LENGTH = 0x0002FF00 /* 192KB , needs to include int_sram_fls_rsv */ int_sram_fls_rsv : ORIGIN = 0x2042FF00, LENGTH = 0x00000100 int_sram_no_cacheable : ORIGIN = 0x20430000, LENGTH = 0x0000FF00 /* 64KB, needs to include int_sram_results */ int_sram_results : ORIGIN = 0x2043FF00, LENGTH = 0x00000100 int_sram_shareable : ORIGIN = 0x20440000, LENGTH = 0x00004000 /* 16KB */ ram_rsvd2 : ORIGIN = 0x20444000, LENGTH = 0 /* End of SRAM */ } How should I modify this ld file, please give an example and list the modification process, thank you! Re: S32K314's SRAM is overflow Hi@shunyizhang In your link file, the SRAM space has been fully used and exceeds 417616 bytes. This number is far beyond our SRAM space. This is not a problem that can be solved by modifying the link file. You should check the space occupied by your application code.

Read and Write FUSE MAC1 in IMX8QXP Hello, I have a board with an IMX8QXP, a question about the MAC1, how can I read the fuse through OCOTP? How can I read or write the fuses through boot? I don't know what bank or offset to put. (command fuse read bb oo) Thank you so much Re: Read and Write FUSE MAC1 in IMX8QXP Hello @Jarbo  It is preferable to do a new post because this thread is related to i.MX8QXP, but for i.MX93 you can find information how to calculate your fuse in reference manual: Best regards, Salas. Re: Read and Write FUSE MAC1 in IMX8QXP IMX8 works perfectly, thanks! I can now read and write with the NXP OCTP driver, but with IMX93, could you please provide me with the offset? I have tried several and I cannot write with this one. Re: Read and Write FUSE MAC1 in IMX8QXP Hello @Jarbo  In i.MX8x families, the fuses are organized in fuse arrays instead of fuse banks and words, in this case, the bank parameter should be set to zero and the word should match the Fuse row Index in the processors fuse map. So, in fuse map we can see the row index for MAC1_ADDR[31:00]:  So, the command to fuse the MAC1_ADDR[31:00] should be: => fuse prog 0 708 0xFFFFFFFF Where 0xFFFFFFFF is your MAC1_ADDR[31:00] I hope this can helps to you. Best regards, Salas.

Can the S32K144 BLDC/PMSM Development Kit Support a 24V Motor Instead of a 12V One? Hello, I'm currently working with the S32K144 BLDC/PMSM Development Kit, which includes the MC34GD3000 motor driver IC. According to the application circuit of the MC34GD3000, it seems to be designed for controlling 12V BLDC motors. However, the BLDC motor that comes with this development kit is actually a 24V motor. This raises some concerns for me: 🔍 My Questions 1️⃣ Is it safe and efficient to use a 24V motor with this kit, even though the MC34GD3000 seems designed for 12V operation? 2️⃣ Can the motor control inverter circuit handle 24V operation without modification, or would it require changes to support the higher voltage? 3️⃣ Are there any voltage-related constraints in the MC34GD3000 that I should be aware of when running a 24V motor? I would really appreciate any insights or recommendations from those who have experience with this kit. Thank you! 🚀😊     Re: Can the S32K144 BLDC/PMSM Development Kit Support a 24V Motor Instead of a 12V One? Hello, Operational range of the S32K144 Devkit (10-18V) is derived from both boards: DEVKIT-MOTORGD at the top and S32K144EVB board at the bottom. Even though motor of the S32K144 devkit is designed for higher voltage 24V, operation is safe and motor control capabilities of the S32K144 MCU are fully demonstrated also at lower voltage level 12V. The only difference is that the maximum no-load speed at 12V is a half of the maximum no-load speed at 24V. It's not recommended to operate the motor beyond the rated voltage range 10-18V, because higher voltage would require more changes to be implemented, particularly on the S32K144EVB. Battery voltage (12V) supplies also S32K144EVB, where the linear voltage regulator converts the battery voltage from (12V) to 5V to supply MCU. 24V might be limiting for it. Besides that, there are also some passive components around which have been selected primarily for 12V. It should be noted that S32K144 development kit has been primarily designed for development purposes not as reference design. S32K144 devkit helps customer at very first stage to evaluate MCU capabilities.  Find some useful links below: https://www.nxp.com/DEVKIT-MOTORGD http://www.nxp.com/S32K144EVB https://www.nxp.com/webapp/Download?colCode=AN5426 Best regards, Marek