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Philips Semiconductors
User’s Manual - Preliminary -
P89LPC901/902/903
CLOCKS
2003 Dec 8 30
.
Figure 2-3: Block Diagram of Oscillator Control - P89LPC901
RTC
CPU
High freq.
Med freq.
Low freq.
Watchdog
Oscillator
RC Oscillator
XTAL1
XTAL2
/2
DIVM
WDT
(7.3728MHz)
(400KHz)
CCLK
PCLK
Timer 0 & 1
OSC
CLK
Oscillator
Clock
CPU
Clock
FOSC2:0
RTCS1:0