P83CE558EBBSLASHYYY datasheet(70/72 Pages) PHILIPS

70 / 72 page

Philips Semiconductors

Preliminary specification

P83CE558/P80CE558/P89CE558

Single-chip 8-bit microcontroller

1996 Aug 06

Figure 65. Instruction cycle timing

XTAL1

INPUT

P1 P2

One Machine Cycle

ALE

PSEN

Int.

address

A0–A7

Int.

address

A0–A7

address

A0–A7

address

A0–A7

address A8–A15

address A8–A15 or Port2 out

address A8–A15

old data

new data

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

Bus

(Port 0)

Port 2

Bus

(Port 0)

Port 2

PORT

OUTPUT

PORT

INPUT

SERIAL

PORT

CLOCK

dotted lines

are valid when RD or

WR are active

only active

during a read

from external

data memory

only active

during a write

to external

data memory

external

program

memory

fetch

read or

write of

external data

memory

Int.

address

A0–A7

Int.

address

A0–A7

data output or data input

address

A0–A7

Purchase of Philips I2C components conveys a license under the Philips’ I2C patent

to use the components in the I2C system provided the system conforms to the

I2C specifications defined by Philips. This specification can be ordered using the

code 9398 393 40011.

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