80C652 Datasheet, PDF (17/25 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontrollers

Phlips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C652/83C652
ALE
PSEN
t_WHLH
WR
PORT 0
PORT 2
t_LLWL
t_WLWH
t_AVLL
t_LLAX
A0–A7
FROM RI OR DPL
t_AVWL
t_QVWX
t_DW
DATA OUT
P2.0–P2.7 OR A8–A15 FROM DPH
t_WHQX
A0–A7 FROM PCL
A8–A15 FROM PCH
Figure 4. External Data Memory Write Cycle
INSTR IN
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE TO SBUF
INPUT DATA
CLEAR RI
0
1
2
3
4
5
6
7
8
t_XLXL
t_QVXH
t_XHQX
t_XHDV
t_XHDX
VALID
VALID
VALID
VALID
VALID
Figure 5. Shift Register Mode Timing
VALID
VALID
SET TI
VALID
SET RI
1996 Aug 15
17