UPD780964 Ver la hoja de datos (PDF) - NEC => Renesas Technology

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UPD780964

8-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD780016Y, 780018Y

3.2 Non-port Pins (2/2)

Pin Name

A0 to A7

A8 to A15

RD

WR

WAIT

ASTB

ANI0 to ANI7

AVREF

AVSS

RESET

X1

X2

XT1

XT2

VDD0

VSS0

VDD1

VSS1

IC

I/O

Output

Output

Output

Input

Output

Input

Input

—

Input

Input

—

Input

—

—

—

—

—

—

Function

Low-order address bus at external memory expansion.

High-order address bus at external memory expansion.

External memory read operation strobe signal output.

External memory write operation strobe signal output.

Wait insertion at external memory access.

Strobe output which externally latches the address information output to

ports 4, 5 and 8 to access external memory.

A/D converter analog input.

A/D converter reference voltage input (shared with analog power supply).

A/D converter ground potential. Same potential as VSS0.

System reset input.

Main system clock oscillation crystal connection.

Subsystem clock oscillation crystal connection.

Port block positive power supply.

Port block ground potential.

Positive power supply (except for port and analog blocks)

Ground potential (except for port and analog blocks)

Internal connection. Connect directly to VSS0.

After Alternate

Reset Function Pin

Input P80 to P87

Input P50 to P57

P64

Input

P65

Input

P66

P67

Input

Input

—

—

—

—

—

Input

—

—

—

—

—

—

P10 to P17

—

—

—

—

—

—

—

—

—

—

—

—

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