HD404818 Datasheet, PDF (29/100 Pages) Hitachi Semiconductor – 16-digit LCD driver

HD404818 Series
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
D₀–D₉
D₁₀–D ₁₃
R0–R3
Output
Standby Mode, Watch Mode
Retained
—
Retained
Stop Mode
High impedance
—
High impedance
Input
Active Mode, Subactive Mode
Input enabled
Input enabled
Input enabled
Non-time-base peripheral function clock (ø_PER) Operating
Stopped
System Clock (ø_CPU)
Operating
Stopped
Active mode
Standby mode
Subactive mode
—
Watch mode (TMA3 = 1)
Stop mode (TMA3 = 0)
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