UPD705100 データシートの表示（PDF） - NEC => Renesas Technology

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UPD705100

V830™ 32-BIT MICROCONTROLLER

NEC => Renesas Technology 

µPD705100

1. PIN FUNCTIONS

1.1 Pin Functions

Pin name

A2-A27

A28-A31/CS0-CS3Note

D0-D31

BE0, BE1

BE2/BH

BE3/A1

ST0-ST3

BCYST

R/W

READY

HLDRQ

HLDAK

SIZ16B

NMI

INT

INTV0-INTV3

BCLK

CMODE

ASEL

RESET

VDD

GND

Input/output

Tristate output

Tristate input/output

Tristate output

Input

Output

Input

-

Function

At hold At reset

Address bus

Hi-Z

Address bus/chip select

Hi-Z/H

Bidirectional data bus

Hi-Z

Indicates which data bus can be used

for data access.

Hi-Z

Indicates access to D16-D23/byte or

halfword access.

Hi-Z

Indicates most significant byte access/A1 Hi-Z

address.

Indicates the status of a bus.

Hi-Z

Indicates the start of a bus cycle.

Hi-Z

Indicates whether the bus cycle is

a read or write cycle.

Hi-Z

Terminates a bus cycle.

-

Requests bus mastership.

-

Response to HLDRQ

L

Fixes the bus width to 16 bits.

-

Nonmaskable interrupt request

-

Maskable interrupt request

-

Indicates an interrupt level.

-

Bus clock input

-

Specifies the frequency ratio for the

-

external bus and the internal circuit.

Selects A28-A31/CS0-CS3.

-

Resets the internal state.

-

Supplies positive power.

-

Ground potential

-

H

H

Hi-Z

H

H

H

0101

H

H

-

-

H

-

-

-

-

-

-

-

-

-

-

Note When used for a chip select signal, this is held at the high level.

7

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