p89c538nbbb NXP Semiconductors, p89c538nbbb Datasheet - Page 20

• Manufacturer Part Number: p89c538nbbb
• Description: Cmos Single-chip 8-bit Microcontrollers With Flash Program Memory
• Manufacturer: NXP Semiconductors

Philips Semiconductors
1997 Jun 05
WRITE TO SBUF
INSTRUCTION
PORT 0
PORT 2
INPUT DATA
OUTPUT DATA
CMOS single-chip 8-bit microcontrollers
with FLASH program memory
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 11.
t
XHQX
2
Figure 12.
1
VALID
Figure 13.
t
QVWX
0.2V
t
CHCL
0.7V
External Data Memory Write Cycle
t
CC
t
XHDX
DATA OUT
QVWH
CC
3
t
WLWH
–0.1
Shift Register Mode Timing
2
VALID
External Clock Drive
20
t
CLCX
4
t
CLCL
VALID
3
t
CHCX
t
CLCH
t
WHLH
t
5
WHQX
VALID
4
89C535/89C536/89C538
A0–A7 FROM PCL
A0–A15 FROM PCH
6
VALID
5
7
Preliminary specification
VALID
6
INSTR IN
8
SU00026
SET TI
VALID
SET RI
SU00027
SU00009
7