27
µ
PD754202, 754202(A)
8. STANDBY FUNCTION
In order to reduce power dissipation while a program is in standby mode, two types of standby modes (STOP
mode and HALT mode) are provided for the
µ
PD754202.
Table 8-1. Operation Status in Standby Mode
Item
Mode
STOP mode
HALT mode
Set instruction
STOP instruction
HALT instruction
Operation
Clock generator
Operation stops.
Only the CPU clock
Φ
halts (oscillation
status
continues).
Basic interval timer/
Operation stops.
Operable
watchdog timer
BT mode : The IRQBT is set in the
reference time interval.
WT mode: Reset signal generation
by BT overflow.
Timer counter
Operation stops.
Operable.
External interrupt
The INT0 is not operable
Note
.
The INT2 is operable at the falling edge of KRn.
CPU
Operation stops.
Release signal
• Reset signal
• Reset signal
• Interrupt request signal sent from
• Interrupt request signal sent from
interrupt enabled hardware
interrupt enabled hardware
• System reset signal (key return reset)
generated by KRn falling edge when
KRREN pin = 1.
Note
Can operate only when the noise eliminator is not used (IM02 = 1) by bit 2 of the edge detection mode
register (IM0).
Содержание Mu754202
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