Product data

HD404818 Series
27
Table 16 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
Serial interface Reset Stopped*
3
OP OP
LCD Reset OP OP OP
I/O Reset*
1
Retained Retained OP
Notes: OP indicates operating.
1. Output pins are at high impedance.
2. Subactive mode is an optional function to be specified on the function option list.
3. Transmission/reception is activated if a clock is input in external clock mode. (However,
interrupts are stopped.)
Table 17 I/O Status in Low-Power Dissipation Modes
Output Input
Standby Mode, Watch Mode Stop Mode Active Mode, Subactive Mode
D
0
–D
9
Retained High impedance Input enabled
D
10
–D
13
— — Input enabled
R0–R3 Retained High impedance Input enabled
System Clock (ø
CPU
)
Operating Stopped
Non-time-base peripheral function clock (ø
PER
) Operating Active mode Standby mode
Subactive mode
Stopped — Watch mode (TMA3 = 1)
Stop mode (TMA3 = 0)