80C575 Datasheet, PDF (30/40 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer

Philips Semiconductors
80C51 8-bit microcontroller family
8K/256 OTP/ROM/ROMless, 4 comparator, failure detect circuitry, watchdog timer
Product specification
80C575/83C575/
87C575
ALE
PSEN
t_WHLH
WR
PORT 0
PORT 2
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
t_LLWL
t_WLWH
t_AVLL
t_LLAX
A0–A7
FROM RI OR DPL
t_AVWL
t_QVWX
t_QVWH
DATA OUT
P2.0–P2.7 OR A8–A15 FROM DPF
t_WHQX
A0–A7 FROM PCL
A0–A15 FROM PCH
Figure 24. External Data Memory Write Cycle
0
1
2
3
4
5
6
7
INSTR IN
SU00026
8
t_XLXL
t_QVXH
t_XHQX
0
t_XHDV
VALID
1
2
t_XHDX
VALID
VALID
3
VALID
4
VALID
Figure 25. Shift Register Mode Timing
5
VALID
6
VALID
7
SET TI
VALID
SET RI
SU00027
V_CC–0.5
0.45V
0.7V_CC
0.2V_CC–0.1
t_CHCL
t_CLCX
t_CHCX
t_CLCH
t_CLCL
SU00009
Figure 26. External Clock Drive
1998 May 01
30