UPD70320GJ-8-5BG 查看數據表（PDF） - NEC => Renesas Technology

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UPD70320GJ-8-5BG

V25™ 16/8-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD70320

1.2 Non-port Pins

Pin Name

TxD0

TxD1

RxD0

RxD1

CTS0

CTS1

REFRQ

VTH

RESET

EA

X1

X2

D0 to D7

A0 to A19

MREQ

MSTB

R/ W

IOSTB

VDD

GND

IC

Input/Output

Output

Serial data output

Function

Input

Serial data input

Input & output

Input

Output

Input

Input

Input & output

Output

CTS input in asynchronous mode, receive clock input/output in I/O interface mode

CTS input

DRAM refresh pulse output

Comparator reference voltage input

Reset signal input

External memory access (connect to GND via a resistor (3 to 10 kΩ))

Used to connect crystal resonator/ceramic resonator for oscillating system clock.

External clock is entered by entering reverse phase clock to both X1 and X2 pins.

8-bit data bus

20-bit address output

Output used to indicate that memory bus cycle has been started

Memory read/memory write strobe output

Read cycle/write cycle ID signal output

I/O read/I/O write strobe output

Positive power supply pins (all pins should be connected)

GND pins (all pins should be connected)

Internally connected (connect individually to VDD via a resistor (3 to 10 kΩ))

8

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