LPC802功耗问题

[haifeng_jin]

Dear NXP：

                  我在实验NXP的LPC802的功耗问题的时候有疑问，测试下来功耗挺高，power-down模式都在60uA，我整个板子上只有一个LPC802的芯片，代码如下：

void Delay_ms(uint16_t ms)
{
uint16_t i,j;
for(j=0;j<ms;j++)
{
for(i=0;i<1000;i++)
{

}
}
}
int main(void) {

unsigned int k, temp;
char buff[30] = "WUSRCREG content is 0xYZ\n\n\r";
uint32_t * addr = (uint32_t *)LPC_IOCON_BASE;

LPC_SYSCON->SYSAHBCLKCTRL[0] |= (GPIO0|IOCON);

Delay_ms(10000);
LPC_IOCON->PIO0_16=0x08;
LPC_IOCON->PIO0_17=0x08;
LPC_IOCON->PIO0_13=0x08;
LPC_IOCON->PIO0_12=0x08;
//LPC_IOCON->PIO0_5=0x08;
//LPC_IOCON->PIO0_4=0x08;
LPC_IOCON->PIO0_2=0x08;
LPC_IOCON->PIO0_3=0x08;
LPC_IOCON->PIO0_11=0x08;
LPC_IOCON->PIO0_10=0x08;
LPC_IOCON->PIO0_15=0x08;
LPC_IOCON->PIO0_1=0x08;
LPC_IOCON->PIO0_9=0x08;
LPC_IOCON->PIO0_8=0x08;
LPC_IOCON->PIO0_7=0x08;
LPC_IOCON->PIO0_0=0x08;
LPC_IOCON->PIO0_14=0x08;
while(1) {
Setup_Low_Power();
// Clear the deep PD pin wakeup source flags in WUSRCREG
LPC_PMU->WUSRCREG = 0xFF;
// Set the SleepDeep bit
SCB->SCR |= (1<<2);
// PCON = 3 selects Deep power-down mode
LPC_PMU->PCON = 0x3;
// Wait here for wakeup pin.
__WFI();
while(1);

} // end of while(1)

} // end of main

[jeremyzhou]

Hi,

非常感谢使用NXP产品，很高兴为你提供技术支持！

请问你使用的板子是LPCXpresso 802 评估板吗还是其他板子？还有你可以试试Code bundle里的PMU_Modes例程再测试一下。

LPCXpresso802 board for LPC802 Microcontroller (MCU)|NXP 

Have a great day,

TIC

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[haifeng_jin]

我就是用这个历程的，板子是MCU在我们自己板子上焊接了一个，不会有什么问题的，就一个芯片，其他都没有，你们在你们的demo上测试过？我也在你们的demo跑过，LPC804的开发板，但是功耗比单芯片更高。

[jeremyzhou]

Hi ,

测试板： OM40000 LPC802评估板

例程：PMU_Modes例程

我这边测试一下，功耗没有达到预想的水平，代码确有缺陷，

要想达到数据手册的功耗水平，还需在原代码的基础上增加如下设置：

1. All pins configured as GPIO outputs driven LOW and pull-up resistors disabled.
2. All oscillators and analog blocks turned off.

Hope it helps.
Have a great day,
TIC

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[haifeng_jin]

hi jeremyzhou：

                   你的代码可以上传吗

[jeremyzhou]

Hi ,

目前只有PMU_Modes例程，优化是需要自己根据这两条要求来做的。

1. All pins configured as GPIO outputs driven LOW and pull-up resistors disabled.
2. All oscillators and analog blocks turned off.

Have a great day,
TIC

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Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[haifeng_jin]

Delay_ms(10000);
LPC_IOCON->PIO0_16=0x08;
LPC_IOCON->PIO0_17=0x08;
LPC_IOCON->PIO0_13=0x08;
LPC_IOCON->PIO0_12=0x08;
//LPC_IOCON->PIO0_5=0x08;
//LPC_IOCON->PIO0_4=0x08;
LPC_IOCON->PIO0_2=0x08;
LPC_IOCON->PIO0_3=0x08;
LPC_IOCON->PIO0_11=0x08;
LPC_IOCON->PIO0_10=0x08;
LPC_IOCON->PIO0_15=0x08;
LPC_IOCON->PIO0_1=0x08;
LPC_IOCON->PIO0_9=0x08;
LPC_IOCON->PIO0_8=0x08;
LPC_IOCON->PIO0_7=0x08;
LPC_IOCON->PIO0_0=0x08;
LPC_IOCON->PIO0_14=0x08;

LPC_GPIO_PORT->CLR0 = 0x00000; // Clear P0.13, P0.14 to '00'
LPC_GPIO_PORT->DIR0 = 0xFFFFF; // P0.13, P0.14 to output、

因为我这样操作了， LPC_SYSCON->SYSAHBCLKCTRL[0] &= ~(GPIO0|IOCON);

但是还是没下去功耗

[jeremyzhou]

Hi ,

请参考附件内低功耗工程。
Have a great day,
TIC

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[haifeng_jin]

hi jeremy：

              thank you，but why the code have so many problems，do you know that？ I do not know why such a simple power problem can be so long without result. Please work hard.

[jeremyzhou]

Hi ,

你确认一下Options>General Options>Target里，MCU是否正确。

我这边没有任何错误。

Have a great day,
TIC

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