80C552 Datasheet, PDF (17/23 Pages) NXP Semiconductors – Single-chip 8-bit microcontroller

Philips Semiconductors
Single-chip 8-bit microcontroller with 10-bit A/D,
capture/compare timer, high-speed outputs, PWM
Product data
80C552/83C552
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_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
t_HIGH
V_IH1
0.8 V
V_IH1
0.8 V
t_LOW
t_r
V_IH1
0.8 V
t_CLCL
t_f
V_IH1
0.8 V
Figure 5. External Clock Drive XTAL1
0
1
2
3
4
5
6
7
t_XLXL
INSTR IN
SU01696
SU01697
8
t_QVXH
t_XHQX
0
1
t_XHDV
2
t_XHDX
VALID
VALID
VALID
3
VALID
4
VALID
Figure 6. Shift Register Mode Timing
5
VALID
6
7
VALID
SET TI
VALID
SET RI
SU01678
2002 Sep 03
17