LPC MicrocontrollersのトピックRe: LPC802 power consumption

LPC802 power consumption

frank-lin-Sunon — Mon, 21 Jun 2021 00:37:51 GMT

Hi,
I get a OM40000 RevA (LPC802) EVB, and trying to get the the power consumption about it.
I install MCUXpressoIDE v11.3.1, SDK v2.9.0.
Import project power_mode_switch from sdk, and change code as attach file.
Remove JP1 jumper, connect a ammeter at JP1, flash code and repower EVB.
I got about 139uA after 10s.
Is this right? For me, it is to high. (I need 20~30uA in my product)

Re: LPC802 power consumption

frank-lin-Sunon — Tue, 22 Jun 2021 01:48:27 GMT

After remove LED daughter board, i could get about 50uA.
But If i add GPIO init, it will increase to 110uA. Is this correct?

Re: LPC802 power consumption

frank-lin-Sunon — Wed, 23 Jun 2021 00:48:26 GMT

I found the problem.
All pin will pull-up after reset, i need to disable pull-up.

Re: LPC802 power consumption

ZhangJennie — Wed, 23 Jun 2021 06:55:11 GMT

In addition, Below are necessary for Idd measurement:

1. IDD measurements were performed with all pins configured as GPIO outputs driven LOW and pull-up resistors disabled.
2. FRO enabled.
3. BOD disabled.
4. All peripherals disabled in the SYSAHBCLKCTRL register. Peripheral clocks disabled in system configuration block.
5, All oscillators and analog blocks turned off.
6. WAKEUP function pin pulled HIGH externally.

Have a nice day

Jun Zhang