PSoC4000S cannot set "Sense clock source" to SSC6 / 7/9/10 on CSD

Tip / Sign in to post questions, reply, level up, and achieve exciting badges. Know more

cross mob
YoIs_1298666
Level 5
Level 5
250 sign-ins 100 replies posted 100 sign-ins

Hello,

I'm looking at the PSoC 4 Capacitive Sensing (CapSense®) datasheet for the feasibility of setting the SSC to the CSD's Sense clock source.

I don't think it is possible to achieve settings that satisfy "1." - "3." in the table below.

Is this correct?

And, is "4." a description of CSX?

YoIs_1298666_0-1623809975813.png

Best regards,

Yocchi

 

0 Likes
1 Solution
Hari
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello Yocchi-san, 

 

You can take a look at this kba - https://community.cypress.com/t5/Knowledge-Base-Articles/Considerations-for-CapSense-Sense-Clock-Par... that describes the sense clock parameters. 

As mentioned in that, the value of Resolution >= 14, sense clock frequency = 93.75 kHz will work with SSC6. Similarly, Resolution >=15 and sense clock frequency of 93.75 kHz will work with SSC7. However, such small sense clock frequencies must be provided carefully as it will affect the IDAC code that is set and consequently, the performance of the sensors. 

 

Point 4 is a description of CSX. 

 

Best regards, 
Hari

View solution in original post

0 Likes
2 Replies
Hari
Moderator
Moderator
Moderator
750 replies posted 500 replies posted 250 solutions authored

Hello Yocchi-san, 

 

You can take a look at this kba - https://community.cypress.com/t5/Knowledge-Base-Articles/Considerations-for-CapSense-Sense-Clock-Par... that describes the sense clock parameters. 

As mentioned in that, the value of Resolution >= 14, sense clock frequency = 93.75 kHz will work with SSC6. Similarly, Resolution >=15 and sense clock frequency of 93.75 kHz will work with SSC7. However, such small sense clock frequencies must be provided carefully as it will affect the IDAC code that is set and consequently, the performance of the sensors. 

 

Point 4 is a description of CSX. 

 

Best regards, 
Hari

0 Likes

Hello, Hari-san,

Thank you very much.

Best regards,

Yocchi

0 Likes