How to use full stop mode(xep100)

[jiexiao]

Hi

I tried to use full sleep mode while found this in datasheet:

"The system stop modes are entered if the CPU executes the STOP instruction unless either the XGATE is
active or an NVM command is active. "

What is "the STOP instruction"?

What should i do except setting  PSTP to zero?

[iggi]

Hi,

See the following document where you can download set of example projects:
LAMA's S12XE unofficial examples 

Find the projects demonstrating usage of Stop mode such as 'XEP100-STOP-WakeUp-CW47.zip'.

The most important thing in order to enter stop mode is to clear S-bit in CCR register and then execute stop instruction, therefore two codelines:

//-----------------------------------------------------------------------------------------
asm ANDCC #0x7F;  //clear S bit - enable stop mode

asm STOP;               //enter stop mode

/*If the S bit is not cleared then STOP instruction has no effect and is executed as a dummy instruction NOP*/

//----------------------------------------------------------------------------------------

Have a great day,
iggi

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