p89c669 NXP Semiconductors, p89c669 Datasheet - Page 23

• 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 7. External data memory write cycle.
Fig 8. Shift register mode timing.
PORT 0
PORT 2
WRITE TO SBUF
INSTRUCTION
OUTPUT DATA
PSEN
INPUT DATA
ALE
CLEAR RI
WR
CLOCK
ALE
t AVWL
t AVLL
0
t LLAX
P2.0-P2.7 OR
A16-A22,P2.7
t QVXH
A8-A15 OR
A0-A7
t XHDV
1
t XLXL
t LLWL
VALID
0
t QVWX
P2.0-P2.7 OR A8-A15
t XHQX
2
Rev. 02 — 13 November 2003
VALID
1
t AVWL1
DATA OUT
80C51 8-bit microcontroller family with extended memory
t QVWH
3
t XHDX
VALID
2
t WLWH
4
VALID
3
5
VALID
4
t WHLH
6
A0-A7 FROM PCL
t WHQX
VALID
5
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
7
002aaa153
VALID
6
8
INSTR IN
002aaa155
P89C669
VALID
7
SET RI
SET TI
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