P89C669 View Datasheet(PDF) - Philips Electronics

Part Name

Description

Manufacturer

P89C669

80C51 8-bit microcontroller family with extended memory; 96 kB Flash with 2 kB RAM

Philips Electronics 

Philips Semiconductors

P89C669

80C51 8-bit microcontroller family with extended memory

Examples:

tAVLL — Time for address valid to ALE LOW.

tLLPL — Time for ALE LOW to PSEN LOW.

10.2 Timing diagrams

tLHLL

ALE

PSEN

PORT 0

PORT 2

tLLPL

tAVLL

tLLAX

A0-A7

P2.0-P2.7 OR

A8-A15 OR

A16-A22,P2.7

tLLIV

tPLIV

tPLPH

tPLAZ

tPXIX

tAVIV1

tAVIV

INSTR IN

P2.0-P2.7 OR A8-A15

Fig 5. External program memory read cycle.

tPXIZ

A0-A7

002aaa150

ALE

PSEN

RD

PORT 0

PORT 2

tLLDV

tLLWL

tRLRH

tLLAX

tAVLL

A0-A7

tAVWL

P2.0-P2.7 OR

A8-A15 OR

A16-A22,P2.7

tRLAZ

tRLDV

tRHDX

DATA in

tAVWL1

tAVDV1

tAVDV

P2.0-P2.7 OR A8-A15

Fig 6. External data memory read cycle.

tWHLH

tRHDZ

A0-A7 FROM PCL

INSTR IN

002aaa151

9397 750 12299

Product data

Rev. 02 — 13 November 2003

© Koninklijke Philips Electronics N.V. 2003. All rights reserved.

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