Hitachi H8/3637 Hardware Manual page 98

Table 5.2 Internal State in Each Operation Mode
Function
System clock oscillator
Subclock oscillator
CPU Instructions Functional Functional Stopped
operation
RAM
Registers
I/O
External IRQ
0
interrupts
IRQ
1
IRQ
2
IRQ
3
IRQ
4
WKP
0
WKP
1
WKP
2
WKP
3
WKP
4
WKP
5
WKP
6
WKP
7
Peripheral Timer A
module
Timer F
functions
Timer G
Timer Y
Watchdog
timer
SCI1
SCI3
PWM
DTMF
A/D
Notes: 1. Register contents held; high-impedance output.
2. Functional only if ø
3. Functional when timekeeping time-base function is selected.
4. External interrupt requests are ignored. The interrupt request register contents are not
affected.
Active Mode
High Medium
Speed Speed
Functional Functional Functional Stopped
Functional Functional Functional Functional Functional Functional Functional
Functional Functional Functional Functional Functional Functional Functional
Functional Functional Functional Functional Functional Functional Functional
Functional Functional Functional Functional *
Functional Functional Functional Retained
Functional Functional Functional Retained
Functional Functional Retained
Functional Functional Functional Reset
Functional Functional Functional Retained
/2 internal clock is selected; otherwise stopped and retained.
W
Sleep Watch
Mode Mode
Stopped
Retained Retained
4
Retained *
Retained
Reset
Retained
Subactive Subsleep
Mode Mode
Stopped Stopped
Functional Stopped
Retained
3 Functional * 3 Functional *
Retained Retained
Functional/ Functional/
Retained * 2 Retained *
Retained Retained
Retained Retained
Reset Reset
Retained Retained
Reset Reset
Retained Retained
Standby
Mode
Stopped
Stopped
Retained
Retained * 1
Retained * 4
3
Retained
2
Retained
Retained
Reset
Retained
Reset
Retained
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