P89C660 Philips Semiconductors, P89C660 Datasheet - Page 82

• Manufacturer Part Number: P89C660
• Description: 80C51 8-bit Flash microcontroller family
• Manufacturer: Philips Semiconductors

Philips Semiconductors
2002 Oct 28
WRITE TO SBUF
INSTRUCTION
PORT 0
PORT 2
INPUT DATA
OUTPUT DATA
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM
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 59. External Data Memory Write Cycle
t
XHQX
2
Figure 60. Shift Register Mode Timing
VALID
1
t
QVWX
Figure 61. External Clock Drive
0.2V
t
CHCL
0.7V
t
CC
t
XHDX
DATA OUT
QVWH
CC
3
t
WLWH
–0.1
VALID
2
82
t
CLCX
4
t
CLCL
VALID
3
t
CHCX
t
CLCH
t
WHLH
P89C660/P89C662/P89C664/
t
5
WHQX
VALID
SU00009
4
A0–A7 FROM PCL
A0–A15 FROM PCH
6
VALID
5
7
VALID
6
P89C668
INSTR IN
Product data
8
VALID
SU00026
SET TI
SET RI
SU00027
7