Dear all,
I want to know the ACLK clock default value in S12zvl controller to calculate watchdog timer time out.
Hi,
Nominal value of ACLK is 20kHz.
ACLK frequency is divided by 2 when ACLK is selected as clock source for watchdog:
So, 10kHz is source clock frequency for COP watchdog.
Minimum timeout (CPMUCOP_CR=0x01, CPMUCLKS _COPOSCSEL1=1) is 2^7*(1/10kHz)=12,8ms
Maximum timeout (CPMUCOP_CR=0x07, CPMUCLKS _COPOSCSEL1=1) is 2^17*(1/10kHz)= 13,1072s
Note: ACLK frequency could be trimmed by modifying CPMUACLKTR register value. Note: After reset a value is automatically loaded again from the Flash memory.
I hope it helps you.
Have a great day,
RadekS
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