Datasheet

PIC24HJXXXGPX06/X08/X10
DS80280G-page 4 © 2008 Microchip Technology Inc.
1. Module: Doze Mode
Enabling Doze mode slows down the CPU but
allows peripherals to run at full speed. When the
CPU clock is slowed down by enabling Doze mode
(CLKDIV<11> = 1), any writes to a peripheral SFR
can cause other updates to that register to cease
to function for the duration of the current CPU
clock cycle. This is only an issue if the CPU
attempts to write to the same register as a
peripheral while in Doze mode.
For instance, if the ADC module is active and Doze
mode is enabled, the main program should avoid
writing to ADCCONx registers because these
registers are being used by the ADC module. If the
CPU does make writes before the ADC module
does, then any attempts by the ADC module to
write to these registers will fail.
Work around
In Doze mode, avoid writing code that will modify
SFRs which may be written to by enabled
peripherals.