PSD311-B-15U View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
PSD311-B-15U Datasheet PDF : 85 Pages
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14.0
System
Applications
(cont.)
PSD3XX Family
In Figure 13, the PSD3XX is configured to work directly with Intel’s 80C196KB
microcontroller, which is a 16-bit address/16-bit data bus processor. The Address and data
lines multiplexed. The PSD3XX is configured to use PC0, PC1, PC2, and A19/CSI as logic
inputs. These signals are independent of the ALE pulse (latch-transparent). They are used
as four general-purpose inputs that take part in the PAD equations.
Port A is configured to work in Track Mode, in which (for certain conditions) PA0–PA7 tracks
lines AD0/A0–AD7/A7. Port B is configured to generate CS0–CS7. In this example, PB2
serves as a WAIT signal that slows down the 80C196KB during the access of external
peripherals. These 8-bit wide peripherals are connected to the shared bus of Port A. The
WAIT signal also drives the buswidth input of the microcontroller, so that every external
peripheral cycle becomes an 8-bit data bus cycle. PB3 and PB4 are open-drain output
signals; thus, they are pulled up externally.
Figure 13. PSD3XX Interface With Intel’s 80C196KB t(s) +5V
+5V
lete Prodduucct(s) NMI
so ro RST
t(s) - Obsolete P RxD
TxD
te Producct(s) - Ob +5V
bsole Produ0.1µF
0.1µF
67
XTAL1
VCC
66
XTAL2
3
43
64
14
16
NMI
READY
BUSWIDTH
CDE
RESET
6
5
7
4
11
10
8
9
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
18 P2.0/TXD
17 P2.1/RXD
15 P2.2/EXINT
44 P2.3/T2CLK
42 P2.4/T2RST
39 P2.5/PWM
33 P2.6/ T2 UP/DN
38 P2.7/ T2 CAPTR
24 HSI.0
25 HSI.1
26 HSI.2/HSO.4
27 HSI.3/HSO.5
13 VREF
37 VPP
12 ANGND
2 EA
VSS
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P3.0/AD0
P3.1/AD1
P3.2/AD2
P3.3/AD3
P3.4/AD4
P3.5/AD5
P3.6/AD6
P3.7/AD7
P4.0/AD8
P4.1/AD9
P4.2/AD10
P4.3/AD11
P4.4/AD12
P4.5/AD13
P4.6/AD14
P4.7/AD15
CLKOUT
BHE / WRH
WR / WRL
RD
ALE /ADV
INST
HSO.0
HSO.1
HSO.2
HSO.3
VSS
19
20
21
22
23
30
31
32
60 AD0/A0
59 AD1/A1
58 AD2/A2
57 AD3/A3
56 AD4/A4
55 AD5/A5
54 AD6/A6
53 AD7/A7
52 AD8/A8
51 AD9/A9
50 AD10/A10
49 AD11/A11
48 AD12/A12
47 AD13/A13
46 AD14/A14
45 AD15/A15
65
41
40
61
62
63
28
29
34
35
80C196KB 68
36
ADDRESS/DATA
MULTIPLEXED BUS
0.1µF
AD[0 ..15]
AD[0 ..15]
PORT 1
I/O PINS
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
44
VCC
23
24
25
26
27
28
29
30
31
32
33
35
36
37
38
39
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
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB0
PB1
PB2
PB3
PB4
PB5
PB6
40 PC0
PB7
41 PC1
42 PC2
43 A19/CSI
21
20
19
18
17
16
15
14
11
10
9 WAIT
8
7
6
5
4
SHARED
BUS
4.7KΩ
4.7KΩ
1 BHE /PSEN
2 WR / VPP
22 RD
+5V
13 ALE
3 RESET
GND GND
PSD3XX 12 34
O lete FOUR
o GENERAL
PURPOSE
Obs INPUTS
ALE
29
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