Write to IMO_TR1 with USB Mode?

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

cross mob
Anonymous
Not applicable

I have a PsoC 5LP (CY8C58LP-LP035) application that infrequently uses a USB connection to a PC.  Most of the time the system runs disconnected from USB.  I would like to be able to trim the IMO while disconnected from USB and use the USB trim while connected to a PC over USB.

It uses the internal IMO at 24MHz and IMOx2 for USB:

pastedImage_0.png

Is it possible to write to IMO_TR1 when the USB cable is physically disconnected?

I am pretty well stuck with the internal oscillator at this point...

0 Likes
1 Solution
SampathS_11
Moderator
Moderator
Moderator
250 sign-ins 250 solutions authored 5 questions asked

IMO_TR1 can be written to when USB is not connected. LSB[2:0] are prevented from being written when USB is disconnected.

Best regards,

Sampath Selvaraj

View solution in original post

0 Likes
1 Reply
SampathS_11
Moderator
Moderator
Moderator
250 sign-ins 250 solutions authored 5 questions asked

IMO_TR1 can be written to when USB is not connected. LSB[2:0] are prevented from being written when USB is disconnected.

Best regards,

Sampath Selvaraj

0 Likes