UPD75218 NEC, UPD75218 Datasheet - Page 26

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

26
7. STANDBY FUNCTIONS
tion in the program standby mode.
Set instruction
System clock when set
Release signal
Two standby modes (STOP mode and HALT mode) are available for the PD75218 to decrease power consump-
Clock oscillator
Basic interval timer
Serial interface
Timer/event counter
Timer/pulse generator
Watch timer
FIP controller/driver
CPU
Table 7-1 Operation Status in Standby Mode
STOP instruction
Setting enabled only for main system
clock
Oscillator stops only for main system
clock
Operation stopped
Operation enabled only when external
SCK input is selected for serial clock
Operation enabled only when TI0 pin
input is specified for count clock
Operation stopped
Operation enabled only f
count clock
Interrupt request signals (except INT0, INT1, and INT2) from operable hardware
enabled by interrupt enable flags, or RESET input.
Operation disabled (display off mode set before disabling)
Operation stopped
STOP mode
XT
is selected for
HALT instruction
Setting enabled for either main system
clock or subsystem clock
Stops only for CPU clock
continued)
Operation continued (IRQBT set at reference
time intervals)
Operation enabled when serial clock other
than
Operation enabled
Operation enabled
Operation enabled
is specified
HALT mode
(oscillation
PD75218