PSD954F512UI Просмотр технического описания (PDF) - STMicroelectronics
Номер в каталоге
Компоненты Описание
производитель
PSD954F512UI Datasheet PDF : 110 Pages
| |||
PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
Figure 23. Interfacing the PSD with the 80C251, with RD and PSEN Inputs
RESET
80C251SB
2
3
4
5
P1.0
P1.1
P1.2
P1.3
6
7
8
P1.4
P1.5
9
P1.6
P1.7
21
X1
20 X2
11
13
P3.0/RXD
14 P3.1/TXD
P3.2/INT0
15 P3.3/INT1
16 P3.4/T0
17 P3.5/T1
10 RST
35
EA
P0.0
P0.1
43
42
P0.2 41
P0.3 40
P0.4 39
P0.5 38
P0.6 37
P0.7 36
P2.0 24
P2.1 25
P2.2 26
P2.3 27
P2.4 28
P2.5 29
P2.6 30
P2.7 31
ALE 33
32
PSEN
18
WR 19
RD/A16
A0
A1
A2
A3
A4
A5
A6
A7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
ALE
RD
WR
PSEN
RESET
RESET
A0
A1
A2
A3
A4
A5
A6
A7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
PSD
30
31
ADIO0
ADIO1
32 ADIO2
33 ADIO3
34 ADIO4
35 ADIO5
36
37
ADIO6
ADIO7
39
40
ADIO8
ADIO9
41 ADIO10
42
43
44
ADIO11
ADIO12
ADIO13
45 ADIO14
46 ADIO15
47 CNTL0 (WR)
50 CNTL1(RD)
49 CNTL 2(PSEN)
10
9
8
PD0- ALE
PD1
PD2
48
RESET
29
PA0
PA1
PA2
28
27
PA3
PA4
PA5
25
24
23
PA6 22
PA7 21
7
PB0 6
PB1 5
PB2
PB3
PB4
4
3
PB5
PB6
2
52
PB7 51
PC0
PC1
20
19
PC2
PC3
PC4
PC5
PC6
PC7
18
17
14
13
12
11
AI02882C
Table 18. 80C251 Configurations
Configuration
80C251 READ/WRITE
Pins
WR
1
RD
PSEN
2
WR
PSEN only
3
WR
PSEN only
WR
4
RD
PSEN
Connecting to PSD Pins
Page Mode
CNTL0
CNTL1
CNTL2
CNTL0
CNTL1
CNTL0
CNTL1
CNTL0
CNTL1
CNTL2
Non-Page Mode, 80C31 compatible A7-
A0 multiplex with D7-D0
Non-Page Mode
A7-A0 multiplex with D7-D0
Page Mode
A15-A8 multiplex with D7-D0
Page Mode
A15-A8 multiplex with D7-D0
48/110
Share Link: 