P83C524IFA datasheet(66/76 Pages) PHILIPS

66 / 76 page

1997 Dec 15

Philips Semiconductors

Product speciﬁcation

8-bit microcontrollers

P83C524; P80C528; P83C528

Fig.34 Instruction cycle timing.

andbook, full pagewidth

MBC487 - 1

P1 P2

one machine cycle

XTAL1

INPUT

address

A0 - A7

inst.

address

A0 - A7

inst.

address

A0 - A7

inst.

address

A0 - A7

inst.

address A8 - A15

address

A0 - A7

inst.

address

A0 - A7

inst.

address

A0 - A7

data output or data input

address A8 - A15

address A8 - A15 or Port 2 out

address A8 - A15

old data

new data

sampling time of I/O port pins during input (including INT0 and INT1)

SERIAL

PORT

CLOCK

PORT

INPUT

PORT

OUTPUT

PORT 2

BUS

(PORT 0)

read or

write of

external data

memory

PORT 2

BUS

(PORT 0)

external

program

memory

fetch

only active

during a write

to external

data memory

only active

during a read

from external

data memory

PSEN

ALE

dotted lines

are valid when

RD or WR are

active

P83C524IFA Datasheet(PDF) 66 Page - NXP Semiconductors

P83C524IFA Datasheet(HTML) 66 Page - NXP Semiconductors

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