PCF80C31-3A PHILIPS [NXP Semiconductors], PCF80C31-3A Datasheet - Page 18

• Manufacturer Part Number: PCF80C31-3A
• Description: CMOS single-chip 8-bit microcontrollers
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
1996 Aug 16
WRITE TO SBUF
INSTRUCTION
PORT 0
PORT 2
INPUT DATA
OUTPUT DATA
CMOS single-chip 8-bit microcontrollers
CLEAR RI
PSEN
ALE
WR
CLOCK
ALE
t
AVLL
0
t
QVXH
FROM RI OR DPL
A0–A7
t
1
LLAX
t
t
AVWL
XHDV
0
t
t
XLXL
VALID
LLWL
V
CC
0.45V
–0.5
P2.0–P2.7 OR A8–A15 FROM DPH
Figure 3. External Data Memory Write Cycle
t
XHQX
2
Figure 4. Shift Register Mode Timing
1
VALID
t
QVWX
Figure 5. External Clock Drive
0.2V
t
CHCL
0.7V
t
CC
XHDX
DATA OUT
CC
3
t
WLWH
–0.1
2
VALID
18
t
CLCX
4
t
CLCL
VALID
3
t
CHCX
t
CLCH
t
WHLH
t
5
WHQX
VALID
4
A0–A7 FROM PCL
A0–A15 FROM PCH
80C31/80C51/87C51
6
VALID
5
7
VALID
6
Product specification
INSTR IN
8
SU00008
SET TI
VALID
SET RI
SU00027
SU00009
7