Is there a PD0 pin/pad on TLSR8251 32pin chip?

Topic

FAQ

Gilbert

Nov 08, 2021 10:20

中 /A

Hi Telink support engineer,

I see that in SDK 3.4.2 for 825x series, for b85M_module config, there is a #define GPIO_WAKEUP_MCU GPIO_PD0 //module wakeup mcu . But when I check TLSR8251 datasheet, ET32/32pin pinout doesn t show PD0 pin(48pin chip has PD0 pinout). My understanding is that this define is different from #define GPIO_WAKEUP_MODULE GPIO_PA2 ,that PA2 is module s physical pinout to the baseboard, but I m not sure whether we can use an IO that is not physically pinout for the use case of module wakeup mcu . Can you clarify it?

Thanks in advance.

3 replies

TL_bloom5 Nov 08, 2021 11:44

中 _/A

Hi Gilbert,

You are right, you cant wakeup the mcu with a pin that is not physically pinout.

Gilbert [Author] Nov 08, 2021 20:45

中 _/A

Ok, thank you bloom5. Maybe I didn't understand it well. mcu wakeup module and module wakeup mcu are bidirectional, mcu means where host runs ,right? If so I got it. I'll use another IO pin for module wakeup mcu.

TL_bloom5 Nov 09, 2021 18:58

中 _/A

yes, you need a physical pinout for your wakeup implementation.