XTAL1
1
1
0
0
32-MHz Crystal Oscillator
32-MHz Crystal Oscillator
XOSC_STB
XTAL2
SLEEPCMD.MODE[1:0]
SLEEPCMD.MODE[1:0]
SLEEPCMD.MODE[1:0]
SLEEPCMD.MODE[1:0]
HFRC_STB
16-MHz RC Oscillator
32-kHz RC Oscillator
CLKCONCMD.OSC
CLKCONCMD.OSC32K
SLEEPCMD.OSC32K_CALDIS
System Clock
32-kHz Clock
Sleep Timer
Watchdog Timer
B0303-02
Power-Management Registers
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Figure 4-1. Clock System Overview
68
Power Management and Clocks SWRU191C– April 2009– Revised January 2012
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