參數(shù)資料
型號(hào)： UPD75048
廠商： NEC Corp.
英文描述： 4-BIT SINGLE-CHIP MICROCOMPUTER
中文描述： 4位單片機(jī)
文件頁(yè)數(shù)： 36/68頁(yè)
文件大?。?/td> 538K
代理商： UPD75048
36
μ
PD75048
8. STANDBY FUNCTIONS
The
μ
PD75048 has two different standby modes (STOP mode and HALT mode) to reduce the power
consumption while waiting for program execution.
Table 8-1 Each Status in Standby Mode
STOP Mode
HALT Mode
Setting Instruction
STOP instrtuction
HALT Instruction
Can be set only when operating on
the main system clock
Can be set either with the main
system clock or the subsystem clock
Only the CPU clock
Φ
stops its
operation (oscillation continues)
Operation
Status
Clock Generator
Only the main system clock stops its
operation
Basic Interval
Timer
No operation
Operates only when main system
clock oscillates (Sets IRQBT at
reference time interval)
Serial Interface
Can operate only when the external
SCK input is selected for the serial
clock
Operates only when external SCK
input is selected as serial clock, or
when main system clock oscillates
Timer/Event
Counter
Can operate only when the TI0 pin
input is selected for the count clock
Operates only when TI0 pin input is
selected as count clock, or when
main system clock oscillates
Watch Timer
Can operate when f
XT
is selected as
the count clock
Can operate
A/D Convertor
No operation
Can operate *
Multi Function
Timer
No operation
Can operate *
EEPROM
No operation
Can operate *
External Interrupt
INT1, INT2, and INT4 can operate.
Only INT0 can not operate.
CPU
No operation
Release Signal
An interrupt request signal from a
hardware whose operation is
enabled by the interrupt enable flag
or the RESET input.
An interrupt request signal from a
hardware whose operation is
enabled by the interrupt enable flag
or the RESET input.
System Clock for Setting
*: Operation is possible only when the main system clock is operating.
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