MC68HC05SU3A Datasheet, PDF (62/80 Pages) Freescale Semiconductor, Inc – Fully static chip design featuring the industry standard 8-bit M68HC05 core

Freescale Semiconductor, Inc.
STOP
Stop External Oscillator,
Stop Internal Timer Clock,
and Reset Start-Up Delay
Stop Internal Processor Clock,
Clear I-Bit in CCR
WAIT
External Oscillator Active,
and Internal
Timer Clock Active
Stop Internal Processor Clock,
Clear I-Bit in CCR
External
Y
RESET?
N
Y
External
RESET?
N
N
IRQ or KBI
Y
Reset External Oscillator,
Interrupt?
and Stabilization Delay
Y
External Hardware
Interrupt?
8
N
End of Start-Up
N
Delay?
Y
Y
Timer
Interrupt?
N
Restart
Internal Processor Clock
Y
Keyboard
N
Interrupt?
Fetch Reset Vector
or
Service Interrupt
(a) Stack
(b) Set I-Bit
(c) Vector to Interrupt
Routine
Figure 8-1 STOP and WAIT Mode Flowcharts
TPG
LOW POWER MODES
MC68HC05SU3A
8-2
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