ZPSD211RL View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ZPSD211RL Datasheet PDF : 51 Pages
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PSD211R Family
14.0
System
Applications
(cont.)
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
VCC
Reset
MICROCONTROLLER
20 PD0
21 PD1
22
23
PD2
PD3
24 PD4
25 PD5
43
45
PE0
PE1
47 PE2
49 PE3
44 PD4
46
48
PE5
PE6
50 PE7
34 PA0
33
32
PA1
PA2
31 PA3
30 PA4
29 PA5
28
27
PA6
PA7
52 VRH
51 VRL
PC0 9
PC1
PC2
10
11
PC3
PC4
PC5
12
13
14
PC6
PC7
15
16
PB0
PB1
42
41
PB2
PB3
40
39
PB4
PB5
PB6
38
37
36
PB7 35
E5
R/W 6
AS
RESET
4
17
XIRQ
IRQ
18
19
MODB
MODA
2
3
XTAL EXTAL
68HC11
44
23
24
25
26
27
28
29
30
AD0/A0
AD1/A1
AD2/A2
AD3/A3
AD4/A4
AD5/A5
AD6/A6
AD7/A7
31
32
33
35
36
37
38
39
AD8/A8
AD9/A9
AD10/A10
AD11/A11
AD12/A12
AD13/A13
AD14/A14
AD15/A15
22 E
2
13
3
1
R/W/VPP
AS
RESET
PSEN
0.1µF
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
21
20
19
18
17
16
15
14
PB0
PB1
PB2
PB3
PB4
PB5
PB6
PB7
11
10
9
8
7
6
5
4
PC0
PC1
PC2
40
41
42
A19/CSI 43
VCC
GND
PSD211R 34 12
22
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