psd813f3 STMicroelectronics, psd813f3 Datasheet - Page 48
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psd813f3
Manufacturer Part Number
psd813f3
Description
Flash In-system Programmable Isp Peripherals For 8-bit Mcus
Manufacturer
STMicroelectronics
Datasheet
1.PSD813F3.pdf
(110 pages)
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PSD813F2, PSD833F2, PSD834F2, PSD853F2, PSD854F2
Figure 23. Interfacing the PSD with the 80C251, with RD and PSEN Inputs
Table 18. 80C251 Configurations
48/110
Configuration
RESET
RESET
1
2
3
4
20
13
14
15
16
17
10
35
21
11
2
4
6
9
3
5
7
8
80C251 READ/WRITE
80C251SB
P3.2/INT0
P3.3/INT1
P1.1
P1.6
X1
X2
P3.0/RXD
P3.1/TXD
P3.4/T0
P3.5/T1
RST
EA
P1.0
P1.2
P1.3
P1.4
P1.5
P1.7
PSEN only
PSEN only
PSEN
PSEN
Pins
WR
WR
WR
WR
RD
RD
RD/A16
PSEN
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
ALE
WR
18
43
42
41
40
39
38
37
36
24
25
26
27
28
29
30
32
19
31
33
RESET
Connecting to PSD Pins
A1
A4
AD10
AD11
AD12
AD13
AD14
ALE
RD
WR
PSEN
A0
A2
A3
A5
A6
A7
AD8
AD9
AD15
CNTL0
CNTL1
CNTL2
CNTL0
CNTL1
CNTL0
CNTL1
CNTL0
CNTL1
CNTL2
A0
A1
A2
A3
A4
A5
A6
A7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
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
30
31
32
33
34
35
36
37
39
40
41
42
43
44
45
46
50
49
48
47
10
9
8
PSD
ADIO0
ADIO1
ADIO2
ADIO3
ADIO4
ADIO5
ADIO6
ADIO7
ADIO8
ADIO9
ADIO10
ADIO11
ADIO12
ADIO13
ADIO14
ADIO15
CNTL0 ( WR )
CNTL1 ( RD )
CNTL 2(PSEN)
PD0-ALE
PD1
PD2
RESET
Page Mode
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
AI02882C
29
28
27
25
24
23
22
19
18
17
14
13
12
11
21
7
6
5
4
3
2
52
51
20