UPD70320 データシートの表示（PDF） - NEC => Renesas Technology

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UPD70320

V25™ 16/8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD70320

1. PIN FUNCTIONS

1.1 Port Pins

Pin Name

P00 to P06

P07/CLKOUT

P10/NMI

P11/INTP0

P12/INTP1

P13/INTP2/INTAK

P14/POLL/INT

P15/ TOUT

P16/SCK0

P17/READY

P20/DMARQ0

P21/DMAAK0

P22/TC0

P23/DMARQ1

P24/DMAAK1

P25/TC1

P26/HLDAK

P27/HLDRQ

PT0 to PT7

Input/Output

Input & output

Input & output/output

Input

Input/input/output

Input & output/input/input

Input & output/output

Input & output/input

Input & output/input

Input & output/output

Input & output/input

Input & output/output

Input & output/output

Input & output/input

Input

Port Function

Control Function

8-bit input/output ports, each to

—

be specified bit-by-bit

System clock output

Used as non-maskable interrupt

—

request input (input port)

Used as both external interrupt

request input and input port

INT acknowledge signal output

Used as both specifiable input/ External interrupt request input

output port and POLL input

Input/output port specifiable

bit-by-bit

Timer output

Serial clock output

READY input

8-bit input/output port specifiable DMA request input (CH0)

bit-by-bit

DMA acknowledge output (CH0)

DMA end output (CH0)

DMA request input (CH1)

DMA acknowledge output (CH1)

DMA end output (CH1)

HOLD acknowledge output

HOLD input

8-bit input port with comparator

—

Remark All port pins become input ports after reset is released.

When using P13/INTP2/INTAK as a INTAK pin, be sure to pull up the pin to avoid a malfunction of external

interrupt controller after reset is released.

7

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