CNT0 Countetd Value write via I2C

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Hardy
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Last seen: 9 months 2 weeks ago
Joined: 2019-12-19 16:02
CNT0 Countetd Value write via I2C

Are the counted value registers of  CNT0 /2 /4 read only or can they be written by I2C byte write to the respective address?

Purpose: I2C variation of duty cycle in oneshot mode...

Device: 
Device Number: 
SLG46826
olehs
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Last seen: 9 months 1 week ago
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Joined: 2018-02-07 11:40
Hi Hardy, 

Hi Hardy, 

Thank you very much for your appeal!

Please don't mix up Counted Value with the Counter Data. If you want to change the duty cycle using the CNT/DLY block you have to change the Counter Data. Counter Data can be read and written. For the CNT/DLY blocks there are the dedicated registers: 0xA5 0xA6 (CNT/DLY0), 0xAA(CNT1/DLY1), 0xAF(CNT2/DLY2), 0xB3(CNT3/DLY3), 0xB8(CNT4/DLY4), 0xBC(CNT5/DLY5), 0xC1(CNT6/DLY6), 0xC6(CNT7/DLY7). By changing these registers you will be able to change the duty cycle in your design. You can also refer to the Cookbook section, where a similar approach has been used:

https://www.dialog-semiconductor.com/greenpak-cookbook/led-control-i2c

https://www.dialog-semiconductor.com/greenpak-cookbook/setting-constant-duty-cycle

Or you can find many interesting designs here:

https://www.dialog-semiconductor.com/sites/default/files/the_greenpak_cookbook_4q2020pdf.pdf

The Counted Value is the additional option that is available for the three counters CNT0, CNT2, and CNT4, which allows reading the internal DFFs' state. 

Please let me know if have more questions about the GPAK.

Best regards, 

olehs