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PSD211RN Datasheet(PDF) 25 Page - STMicroelectronics

Part # PSD211RN
Description  Low Cost Field Programmable Microcontroller Peripherals
PDF  51 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

PSD211RN Datasheet(HTML) 25 Page - STMicroelectronics

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PSD211R Family
22
In Figure 12, the PSD211R is configured to interface with Motorola’s 68HC11, which
is a 16-bit address/8-bit data bus microcontroller. Its data bus is multiplexed with the
low-order address byte. The 68HC11 uses E and R/W signals to derive the read and write
strobes. It uses the term AS (address strobe) for the address latch pulse. RESET is an
active low signal. Only the necessary connections are shown.
Figure 12. Interface With Motorola’s 68HC11
MICROCONTROLLER
20
21
22
23
24
25
43
45
47
49
44
46
48
50
34
33
32
31
30
29
28
27
52
51
23
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
22
2
13
3
1
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
E
R/W
AS
RESET
XIRQ
IRQ
MODB
MODA
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
PC0
PC1
PC2
A19/CSI
9
10
11
12
13
14
15
16
42
41
40
39
38
37
36
35
5
6
4
17
18
19
2
3
21
20
19
18
17
16
15
14
11
10
9
8
7
6
5
4
40
41
42
43
PD0
PD1
PD2
PD3
PD4
PD5
PE0
PE1
PE2
PE3
PD4
PE5
PE6
PE7
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
VRH
VRL
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
E
R/W/VPP
AS
RESET
PSEN
GND
PSD211R
34
12
VCC
VCC
68HC11
XTAL EXTAL
44
0.1µF
Reset
14.0
System
Applications
(cont.)



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