SC80C31BACA44 Просмотр технического описания (PDF) - Philips Electronics
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SC80C31BACA44 Datasheet PDF : 22 Pages
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Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C31/80C51/87C51
ALE
PSEN
tWHLH
WR
PORT 0
PORT 2
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
tLLWL
tWLWH
tAVLL
tLLAX
A0–A7
FROM RI OR DPL
tAVWL
tQVWX
DATA OUT
P2.0–P2.7 OR A8–A15 FROM DPH
tWHQX
A0–A7 FROM PCL
A0–A15 FROM PCH
Figure 3. External Data Memory Write Cycle
0
1
2
3
4
5
6
7
INSTR IN
SU00008
8
tXLXL
tQVXH
tXHQX
0
tXHDV
VALID
1
2
tXHDX
VALID
VALID
3
VALID
4
VALID
Figure 4. Shift Register Mode Timing
5
VALID
6
VALID
7
SET TI
VALID
SET RI
SU00027
VCC–0.5
0.45V
0.7VCC
0.2VCC–0.1
tCHCL
tCLCX
tCHCX
tCLCH
tCLCL
Figure 5. External Clock Drive
SU00009
1996 Aug 16
3-19
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