LPC Microcontrollers中的主题 Unexpected sram content after a wake up from power down (LPC802)

Unexpected sram content after a wake up from power down (LPC802)

emmanuelJJ — Tue, 19 Jul 2022 10:00:15 GMT

Hi All,

My software context:

The LPC802 is configured to have WKT interruption each 100ms. And inside WKT_IRQHandler, I increments a counter.

LPC802 goes to "power down" mode after the execution of WKT_IRQHandler.

My issue:

When i look the real time "global variable", my counter is well incremented but it takes some unexpected value

Alice_Yang — Wed, 20 Jul 2022 07:17:58 GMT

Hello,

"but it takes some unexpected value"

->> Could you please describe more about the unexpected value? What value it is? And what value it should be?

Alice

emmanuelJJ — Fri, 22 Jul 2022 08:29:01 GMT

Hello,

For example about a constante variable:

- During active mode, constante variable equals to 200. ==> OK for me.

- During low power mode, this constante variable equals to 53765 or 53760 ==> Normal behavior??

Alice_Yang — Mon, 25 Jul 2022 07:08:38 GMT

Hello ,

Const data should in Flash memory, not SRAM, please check on your side.

ANd in Power-down mode, the FLASH is off.

Alice