HD404328 Datasheet, PDF (29/96 Pages) Hitachi Semiconductor – 4 BIT SINGLE CHIP MICROCOMPUTER

Non-Time-Base
Peripheral Function
Clock (ø_PER)
Operating
Stopped
HD404328 Series
System Clock (ø_CPU)
Operating
Stopped
Active mode
Standby mode
Subactive mode
—
Watch mode (TMA3 = 1)
Stop mode (TMA3 = 0)
Table 20 Operations in Low-Power Dissipation Modes
Function
Stop Mode
Watch Mode
Standby Mode
Subactive Mode*³
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
A/D
Reset
Stopped
OP
Stopped
Zero-crossing
Stopped*⁴
Stopped*⁴
OP
OP
detection
Notes: OP: indicates 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. The bias circuits still operate when the D₈/ZCD/EVENT pin is set to ZCD.
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