MSM66P509 Просмотр технического описания (PDF) - Oki Electric Industry

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производитель

MSM66P509

OLMS-66K Series 16-Bit Microcontroller

Oki Electric Industry 

¡ Semiconductor

MSM66509/66P509

PIN DESCRIPTION (Continued)

Symbol

AI0-AI15

AVDD

VREF

AGND

OSC0

OSC1

ALE

PSEN

OE

NMI

RES

EA

VDD

GND

Type

I

I

I

I

I

O

O

O

I

I

I

I

I

I

Description

Analog signal input pin for A/D converter

Power supply input pin for A/D converter

Reference voltage input pin for A/D converter

GND input pin for A/D converter

Basic clock oscillation pin

Basic clock oscillation pin

Timing pulse output pin to latch the lower 8 bits of the address output from port

0 when the CPU accesses the external memory

Strobe pulse output pin to fetch to external program memory

When P0, P1, P7.4-P7.7, and P8-P11 are in an output state and OE pin is "H"

level, the ports go to a high-impedance state.

When P0, P1, P7.4-P7.7, and P8-P11 are in an output state and OE pin is "L"

level, the ports output "H" or "L" level.

However, when P0, P1, P7.4-P7.7, and P8-P11 are in an input state, these ports

are not under the influence of OE pin.

Nonmaskable interrupt request input pin

Low-active RESET input pin

Normally set to "H" level. If set to "L" level, the program memory goes into

external access mode and accesses external program memory

Power supply pin

Ground pin

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