HD404629R Datasheet, PDF (34/157 Pages) Renesas Technology Corp – AS Microcomputer Incorporating a DTMF Generator Circuit

HD404629R Series
Table 20 Operations in Low-Power Dissipation Modes
Function
Stop Mode
Watch Mode
Standby Mode
Subactive Mode^*2
CPU
Reset
Retained
Retained
OP
RAM
Retained
Retained
Retained
OP
Timer A
Reset
OP
OP
OP
Timer B
Reset
Stopped
OP
OP
Timer C
Reset
Stopped
OP
OP
Timer D
Reset
Stopped
OP
OP
Serial interface Reset
Stopped^*3
OP
OP
A/D
Reset
Stopped
OP
Stopped
LCD
Reset
OP ^*4
OP
OP
DTMF
Reset
Reset
Stopped
Reset
I/O
Reset^*1
Retained
Retained
OP
Notes: OP implies in operation.
1. Output pins are at high impedance.
2. Subactive mode is an optional function specified on the function option list.
3. Transmission/Reception is activated if a clock is input in external clock mode. However,
interrupts stop.
4. When a 32-kHz clock source is used.
Table 21 I/O Status in Low-Power Dissipation Modes
D₀–D₉
D₁₀–D₁₁
R0–R7
Output
Standby Mode,
Watch Mode
Stop Mode
Retained
High impedance
—
—
Retained or output
of peripheral functions
High impedance
Input
Active Mode,
Subactive Mode
Input enabled
Input enabled
Input enabled
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