UPD75004 Ver la hoja de datos (PDF) - NEC => Renesas Technology

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Fabricante

UPD75004

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD75004, 75006, 75008

7. STANDBY FUNCTIONS

The µPD75008 has two different standby modes (STOP mode and HALT mode) to reduce the power

consumption while waiting for program execution.

Table 7-1 Each Status in Standby Mode

Setting Instruction

System Clock for Setting

Operation Clock Generator

Status

Basic Interval

Timer

Serial Interface

Timer/Event

Counter

Watch Timer

External Interrupt

CPU

Release Signal

STOP Mode

HALT Mode

STOP instrtuction

Can be set only when operating on

the main system clock

Only the main system clock stops its

operation.

No operation

Can operate only when the external

SCK input is selected for the serial

clock

Can operate only when the TI0 pin

input is selected for the count clock

Can operate when fXT is selected as

the count clock

HALT instruction

Can be set either with the main

system clock or the subsystem clock

Only the CPU clock Φ stops its

operation. (oscillation continues)

Can operate only when main system

clock oscillates (Sets IRQBT at

reference time interval)

Can operate only when external SCK

input is selected as serial clock, or

when main system clock oscillates

Can operate only when TI0 pin input

is selected as count clock, or when

main system clock oscillates

Can operate

INT1, INT2, and INT4 can operate.

Only INT0 can not operate.

No operation

An interrupt request signal from a

hardware whose operation is

enabled by the interrupt enable flag

or the RESET signal input

An interrupt request signal from a

hardware whose operation is

enabled by the interrupt enable flag

or the RESET signal input

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