PXD20RM Datasheet, PDF (1278/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

4-16 MHz
OSCA
16 MHz FIRC
128 kHz SIRC
32 kHz
OSCB
RTCCNT
sync
22:31
APIVAL
+
APIEN
reset
22:31
offset reg
==
load
sync
32-bit counter
reset
10:21
==
RTCVAL
APIF
APIIE
sync
sync
RTCF
RTCIE
ROVRF
RTCIE
ROVREN
Figure 36-1. RTC/API block diagram
API wakeup
API
interrupt
RTC wakeup
RTC interrupt
36-2
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor