P87C660X2 PHILIPS [NXP Semiconductors], P87C660X2 Datasheet - Page 89

• Manufacturer Part Number: P87C660X2
• Description: 80C51 8-bit microcontroller family
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2003 Oct 02
PORT 0
PORT 2
80C51 8-bit microcontroller family
RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33
MHz), two 400KB I
PSEN
(INPUT/OUTPUT)
(INPUT/OUTPUT)
ALE
WR
SDA
SCL
START or repeated START condition
t
AVLL
t
2
HD;STA
C interfaces
t
FD
FROM RI OR DPL
t
t
A0–A7
RC
LOW
t
LLAX
t
AVWL
t
t
LLWL
RD
t
HIGH
16 KB OTP/ROM, 512B
P2.0–P2.7 OR A8–A15 FROM DPF
Figure 52. External Data Memory Write Cycle
Figure 53. Timing SIO1 (I
t
FC
t
t
SU;DAT1
QVWX
t
DATA OUT
QVWH
t
WLWH
t
HD;DAT
89
2
C) interface
repeated START condition
STOP condition
t
WHLH
t
WHQX
A0–A7 FROM PCL
A0–A15 FROM PCH
t
SU;DAT2
P8xC660X2/661X2
t
SU;STA
t
0.3 V
SU; STO
0.7 V
t
SU;DAT3
DD
DD
t
BUF
START condition
SU01759
0.7 VDD
0.3 VDD
INSTR IN
Product data
SU00026