Dear Team,
I want to know the default value of ACLK clock available in S12ZVL controller .
It is good to have if I get example of watchdog timer for S12zvl controller.
Thanks & Regards,
Charudatta
L&T Technology Services Ltd
www.LntTechservices.com<;http://www.lnttechservices.com/>
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Hi,
This information is directly from MC9S12ZVL Family Reference Manual Rev. 1.04
Please look at chapter A.2.1 VREG Electrical Specifications (page 685), parameter 7,
Trimmed ACLK output frequency, typical value fACLK=20kHz.
I hope it helps you.
Have a great day,
RadekS
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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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Note: If this post answers your question, please click the Correct Answer button. Thank you!
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Dear RadekS,
Thanks for answer. The value of ACLK is not mention in S12zvl datasheet .
May I know how you got ACLK value.
Thanks & Regards
Charudatta
Hi,
This information is directly from MC9S12ZVL Family Reference Manual Rev. 1.04
Please look at chapter A.2.1 VREG Electrical Specifications (page 685), parameter 7,
Trimmed ACLK output frequency, typical value fACLK=20kHz.
I hope it helps you.
Have a great day,
RadekS
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Thank you very much