
MAXQ612/MAXQ622 User’s Guide
2-24 Maxim Integrated
Figure 2-9. MAXQ612/MAXQ622 Clock Sources
Figure 2-10. On-Chip Crystal Oscillator
GLITCH-FREE
MUX
DIV 1
DIV 2
DIV 4
DIV 8
PMM
CLOCK
DIVIDER
SELECTOR
DEFAULT
WATCHDOG
TIMER
RESET DOG
RWT
RESET
POWER-ON
RESET
STOP
STOP
POWER-ON
RESET
SWB
INTERRUPT/SERIAL PORT
RESET
STOP
WATCHDOG RESET
CLOCK
GENERATION
SYSTEM CLOCK
ENABLE
WATCHDOG INTERRUPT
HF
CRYSTAL
8kHz
RING
WAKE-UP TIMER
CRYSTAL KILL
XDOG
STARTUP
TIMER
CLK INPUT
RESET
XDOG DONE
MAXQ612
MAXQ622
CLOCK CIRCUITRY
STOP
V
DD
HFXIN
HFXOUT
C1
C2
R
F
R
F
= 1MΩ ±50%
MAXQ612
MAXQ622
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