p89c669 NXP Semiconductors, p89c669 Datasheet - Page 22

• Manufacturer Part Number: p89c669
• Description: P89c669 80c51 8-bit Microcontroller Family With Extended Memory; 96 Kb Flash With 2 Kb Ram
• Manufacturer: NXP Semiconductors

Philips Semiconductors
9397 750 12299
Product data
Fig 5. External program memory read cycle.
Fig 6. External data memory read cycle.
PORT 0
PORT 2
PORT 0
PORT 2
PSEN
PSEN
ALE
ALE
RD
10.2 Timing diagrams
t AVWL
t AVLL
t AVLL
t LHLL
Examples:
t
t
AVLL
LLPL
t LLAX
t LLAX
t LLPL
P2.0-P2.7 OR
A16-A22,P2.7
P2.0-P2.7 OR
A16-A22,P2.7
A8-A15 OR
A8-A15 OR
A0-A7
A0-A7
— Time for address valid to ALE LOW.
— Time for ALE LOW to PSEN LOW.
t LLWL
t RLAZ
t AVIV
t AVDV
t PLAZ
t LLDV
t LLIV
P2.0-P2.7 OR A8-A15
Rev. 02 — 13 November 2003
t PLIV
t AVDV1
t AVIV1
P2.0-P2.7 OR A8-A15
t AVWL1
t PLPH
t RLDV
80C51 8-bit microcontroller family with extended memory
t RLRH
INSTR IN
DATA in
t RHDX
t PXIX
t WHLH
t RHDZ
A0-A7 FROM PCL
t PXIZ
A0-A7
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
002aaa151
002aaa150
INSTR IN
P89C669
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