UPD70F3201 datasheet(28/98 Pages) NEC

Part #	UPD70F3201

Description	32-BIT SINGLE-CHIP MICROCONTROLLERS

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Manufacturer	NEC [NEC]

Direct Link	http://www.nec.com/

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Preliminary Product Information U15436EJ1V0PM

28

µµµµPD703201, 703201Y, 703204, 703204Y, 70F3201, 70F3201Y, 70F3204, 70F3204Y

5. EXTERNAL BUS INTERFACE FUNCTION

The V850ES/SA2 and V850ES/SA3 incorporate an external bus interface function that can be used to connect

memories, such as ROM or RAM, and peripheral I/O externally.

The external bus interface function has the following features.

Separate bus/multiplexed bus output selectable

8-bit/16-bit data bus sizing function

Chip select function for four spaces

Wait function

• Programmable wait function

• External wait function

Idle state function

Bus hold function

The following pins are used for the external bus interface.

Table 5-1. List of Bus Control Pins (When Multiplexed Bus Is Selected)

Bus Control Pin

Alternate Function

I/O

Function

AD0 to AD15

PDL0 to PDL15

I/O

Address/data bus

A16 to A23

Note

PDH0 to PDH7

Output

Address bus

WAIT

PCM0

Input

External wait control

CLKOUT

PCM1

Output

Internal system clock

CS0 to CS3

PCS0 to PCS3

Output

Chip select

WR0, WR1

PCT0, PCT1

Output

Write strobe signal

RD

PCT4

Output

Read strobe signal

ASTB

PCT6

Output

Address strobe signal

HLDRQ

PCM3

Input

HLDAK

PCM2

Output

Bus hold control

Note A16 to A21 in the V850ES/SA2.

Table 5-2. List of Bus Control Pins (When Separate Bus Is Selected)

Bus Control Pin

Alternate Function

I/O

Function

AD0 to AD15

PDL0 to PDL15

I/O

Data bus

A0 to A15

P90 to P915

Output

Address bus

A16 to A23

Note

PDH0 to PDH7

Output

Address bus

WAIT

PCM0

Input

External wait control

CLKOUT

PCM1

Output

Internal system clock

CS0 to CS3

PCS0 to PCS3

Output

Chip select

WR0, WR1

PCT0, PCT1

Output

Write strobe signal

RD

PCT4

Output

Read strobe signal

HLDRQ

PCM3

Input

HLDAK

PCM2

Output

Bus hold control

Note A16 to A21 in the V850ES/SA2.

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