OM5202 データシートの表示（PDF） - Philips Electronics
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OM5202 Datasheet PDF : 11 Pages
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Philips Semiconductors
ROMless 8-bit microcontroller
Product specification
OM5202
ALE
PSEN
tWHLH
WR
PORT 0
PORT 2
tLLWL
tWLWH
tAVLL
tLLAX
A0–A7
FROM RI OR DPL
tAVWL
tQVWX
tDW
DATA OUT
P2.0–P2.7 OR A8–A15 FROM DPH
tWHQX
A0–A7 FROM PCL
A8–A15 FROM PCH
Figure 4. External Data Memory Write Cycle
INSTR IN
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
0
1
2
3
4
5
6
7
8
tXLXL
tQVXH
tXHQX
tXHDV
tXHDX
VALID
VALID
VALID
VALID
VALID
Figure 5. Shift Register Mode Timing
VALID
VALID
SET TI
VALID
SET RI
VIH1
0.8V
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 6. External Clock Drive at XTAL1
December 1994
10
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