UPD780703Y datasheet(11/66 Pages) NEC

Part #	UPD780703Y

Description	8-BIT SINGLE-CHIP MICROCONTROLLER

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Manufacturer	NEC [NEC]

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

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µPD78F0034A, 78F0034AY

11

Data Sheet U14040EJ4V0DS

3. PIN FUNCTIONS

3.1 Port Pins (1/2)

Pin Name

I/O

Function

After Reset

Alternate

Function

P00

I/O

Port 0

Input

INTP0

P01

4-bit I/O port.

INTP1

P02

Input/output can be specified in 1-bit units.

INTP2

P03

An on-chip pull-up resistor can be specified by software.

INTP3/ADTRG

P10 to P17

Input

Port 1

Input

ANI0 to ANI7

8-bit input-only port.

P20

I/O

Port 2

Input

SI30

P21

6-bit I/O port.

SO30

P22

Input/output can be specified in 1-bit units.

SCK30

P23

An on-chip pull-up resistor can be specified by software.

RxD0

P24

TxD0

P25

ASCK0

P30

I/O

Port 3

N-ch open-drain I/O port.

Input

–

P31

7-bit I/O port.

LEDs can be driven directly.

P32

Input/output can be specified

SDA0Note 1

P33

in 1-bit units.

SCL0Note 1

P34

An on-chip pull-up resistor can be

SI31Note 2

P35

specified by software.

SO31Note 2

P36

SCK31Note 2

P40 to P47

I/O

Port 4

Input

AD0 to AD7

8-bit I/O port.

Input/output can be specified in 1-bit units.

An on-chip pull-up resistor can be specified by software.

Interrupt request flag KRIF is set to 1 by falling edge detection.

P50 to P57

I/O

Port 5

Input

A8 to A15

8-bit I/O port.

LEDs can be driven directly.

Input/output can be specified in 1-bit units.

An on-chip pull-up resistor can be specified by software.

P64

I/O

Port 6

Input

RD

P65

4-bit I/O port.

WR

P66

Input/output can be specified in 1-bit units.

WAIT

P67

An on-chip pull-up resistor can be specified by software.

ASTB

Notes 1.

SDA0 and SCL0 are incorporated only in the

µPD78F0034AY Subseries.

2.

SI31, SO31, and SCK31 are incorporated only in the

µPD78F0034A Subseries.

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