80C528 Datasheet, PDF (17/26 Pages) NXP Semiconductors – CMOS single-chip 8-bit microcontroller

Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C528/83C528
ALE
PSEN
t_WHLH
WR
PORT 0
t_LLWL
t_AVLL
t_LLAX
A0–A7
FROM RI OR DPL
t_AVWL
t_WLWH
t_QVWX
DATA OUT
t_WHQX
A0–A7 FROM PCL
INSTR IN
PORT 2
P2.0–P2.7 OR A8–A15 FROM DPF
A8–A15 FROM PCH
Figure 3. External Data Memory Write Cycle
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
0
1
t_XHDV
2
t_XHDX
VALID
VALID
VALID
3
VALID
4
VALID
Figure 4. Shift Register Mode Timing
5
VALID
6
VALID
7
SET TI
VALID
SET RI
START or repeated START condition
t_RD
SDA
(INPUT/OUTPUT)
SCL
(INPUT/OUTPUT)
t_FD
t_RC
t_HD;STA t_LOW t_HIGH
repeated START condition
STOP condition
t_SU;STA
START condition
t_FC
t_SU;DAT1
t_HD;DAT
Figure 5. Timing SIO1 (I²C) Interface
t_BUF
t_{SU; STO}
0.7 V_DD
0.3 V_DD
t_SU;DAT3
t_SU;DAT2
0.7 V_DD
0.3 V_DD
1995 Feb 02
17