IC89E54 Datasheet, PDF (31/36 Pages) Integrated Circuit Solution Inc – 8-BITS SINGLE MICROCONTROLLER with 16/32/64-Kbytes of FLASH, 256 byte +512 byte RAM

IC89E54/58/64
ALE
PSEN
WR
PORT 0
PORT 2
tWHLH
tLLWL
tWLWH
tAVLL
tLLAX
A7-A0 FROM RI OR DPL
tAVWL
tQVWX
DATA OUT
A15-A8 FROM DPH
tWHQX
A7-A0 FROM PCL
INSTR IN
A15-A8 FROM PCH
Figure 21. External Data Memory Write Cycle
INSTRUCTION
ALE
CLOCK
DATAOUT
DATAIN
0
1
2
3
4
5
6
7
8
tXLXL
tQVXH
0
tXHQX
1
tXHDV
VALID
VALID
2
tXHDX
VALID
3
VALID
4
VALID
5
VALID
Figure 22. Shift Register Mode Timing Waveform
6
VALID
7
SET TI
VALID
SET RI
Integrated C ircuitSolution Inc.
31
MC012-0C 11/16/2001