P80C31SFPN PHILIPS [NXP Semiconductors], P80C31SFPN Datasheet - Page 26

• Manufacturer Part Number: P80C31SFPN
• Description: 80C51 8-bit microcontroller family 4K/128 OTP/ROM/ROMless low voltage 2.7V.5.5V, low power, high speed 33 MHz
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2000 Jan 20
WRITE TO SBUF
INSTRUCTION
PORT 0
PORT 2
INPUT DATA
OUTPUT DATA
80C51 8-bit microcontroller family
4K/128 OTP/ROM/ROMless, low voltage (2.7V–5.5V),
low power, high speed (33 MHz)
CLEAR RI
PSEN
ALE
WR
CLOCK
ALE
t
AVLL
0
t
QVXH
FROM RI OR DPL
A0–A7
t
t
1
XHDV
LLAX
t
AVWL
0
t
t
XLXL
VALID
LLWL
V
CC
0.45V
–0.5
P2.0–P2.7 OR A8–A15 FROM DPF
Figure 16. External Data Memory Write Cycle
t
XHQX
2
Figure 17. Shift Register Mode Timing
1
VALID
t
QVWX
Figure 18. External Clock Drive
0.2V
t
CHCL
0.7V
t
CC
t
XHDX
DATA OUT
QVWH
CC
3
t
WLWH
–0.1
2
VALID
26
t
CLCX
4
t
CLCL
VALID
3
t
CHCX
t
CLCH
t
WHLH
t
5
WHQX
SU00009
VALID
4
A0–A7 FROM PCL
A0–A15 FROM PCH
80C51/87C51/80C31
6
VALID
5
7
VALID
6
Product specification
INSTR IN
8
SU00026
SET TI
VALID
SET RI
SU00027
7