Mosquito: I don’t understand what you are
asking.
Holger: Interesting. When you did your
modification, did you disconnect the signal
coming into or out of U4 or do you keep your
CM15A connected to your PC 24/7? The former
would then have the time of day clock timing
based on the CY7C63723’s internal clock
similar to what happens in a power outage and
the latter would have the clock be
continuously updated by the PCs clock.
How are you checking the clock accuracy? If
you are using reports from the PC, that can’t
be relied on, as the PC will almost certainly
have recently updated the clock in the CM15A.
How did you overcome the difference in RF
frequency? Are you going to publish on the
web your modifications for others to use? I
would be interested to see what you have done.