UPD70433GJ-16-3EB 查看數據表（PDF） - NEC => Renesas Technology

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UPD70433GJ-16-3EB

V55PI™ 16-BIT MICROPROCESSOR

NEC => Renesas Technology 

µPD70433

1.1.2 Non-Port Pins

(1) Bus control pins

Pin Name

ASTB

RD

WRL

WRH

READY

DEX

RAS

D8/D16

BUSLOCK

POLL

HLDRQ

HLDAK

REFRQ

AD0 to AD15

A16 to A23

IORD

IOWR

DMARQ0

DMARQ1

DMAAK0

DMAAK1

TCE0

TCE1

Input/

Output

Function

External bus cycle address strobe signal output in external bus

Output

External memory cycle data read strobe signal output in

external bus

External memory cycle lower byte data write strobe signal

output in external bus

External memory cycle upper byte data write strobe signal

output in external bus

Input

External bus cycle ready signal input in external bus

Output

External bus cycle upper byte data enable signal output

DRAM low address latch timing signal output

Input

External bus data bus width selection signal input

Output

External bus bus lock signal output

Input

Input of POLL signal (sampled in POLL instruction execution)

External bus hold request signal input

Output

External bus hold acknowledge signal output

Refresh pulse signal output

3–state

External bus cycle address/data multiplex signal input/output

input/output in external bus

3–state

output

External bus cycle address signal output in external bus

Output

External I/O cycle data read strobe signal output

External I/O cycle data write strobe signal output

Input

DMA request signal input (channel 0)

DMA request signal input (channel 1)

DMA acknowledge signal output (channel 0)

Output

DMA acknowledge signal output (channel 1)

DMA termination signal output (channel 0)

DMA termination signal output (channel 1)

Alternate

Function

–––

P80

P81

–––

11

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