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PSD211R 数据表(PDF) 24 Page - STMicroelectronics

部件名 PSD211R
功能描述  Low Cost Field Programmable Microcontroller Peripherals
PDF  51 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

PSD211R 数据表(HTML) 24 Page - STMicroelectronics

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PSD211R Family
21
14.0
System
Applications
In Figure 11, the PSD211R is configured to interface with Intel’s 80C31, which is a 16-bit
address/8-bit data bus microcontroller. Its data bus is multiplexed with the low-order
address byte. The 80C31 uses signals RD to read from data memory and PSEN to read
from code memory. It uses WR to write into the data memory. It also uses active high reset
and ALE signals. Only the necessary connections are shown.
Figure 11. Interface With Intel’s 80C31
MICROCONTROLLER
31
19
18
9
12
13
14
15
1
2
3
4
5
6
7
8
23
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
22
2
1
13
3
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
RD
WR
PSEN
ALE
TXD
RXD
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2
A19/CSI
39
38
37
36
35
34
33
32
21
22
23
24
25
26
27
28
17
16
29
30
11
10
21
20
19
18
17
16
15
14
11
10
9
8
7
6
5
4
40
41
42
43
EA/VP
X1
X2
RESET
INT0
INT1
T0
T1
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
AD0/A0
AD1/A1
AD2/A2
AD3/A3
AD4/A4
AD5/A5
AD6/A6
AD7/A7
AD8/A8
AD9/A9
AD10/A10
AD11/A11
AD12/A12
AD13/A13
AD14/A14
AD15/A15
RD
WR/VPP
PSEN
ALE
RESET
GND
PSD211R
80C31
Reset
34
12
VCC
44
0.1µF
NOTE: RESET to the PSD211R must be the output of a RESET chip or buffer.
If RESET to the 80C31 is the output of an RC circuit, a separate buffered RC RESET to the
PSD211R (shorter than the 80C31 RC RESET) must be provided to avoid a race condition.



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