ST1284-02 查看數據表（PDF） - STMicroelectronics
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ST1284-02 Datasheet PDF : 6 Pages
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FUNCTIONAL DIAGRAM
17 Select in
1
16 Reset
15 Error
2
14 Autofeed
Vcc 20
1 Strobe
3
2 Bit 1
4
3 Bit 2
5
4 Bit 3
6
5 Bit 4
7
6 Bit 5
9
7 Bit 6
11
8 Bit 7
13
9 Bit 8
14
10 Acknowledge
8
11 Busy
12 Paper Out
10
13 Select paper
ST1284-xxA8
Vcc
Vcc
ST1284-xxA8
28
27
26
25
24
23
21
19
18
17
16
12
15
22
Gnd
1
14
25
13
APPLICATION INFORMATION
The functional diagram here above presents a IEEE1284-A connector pinout and show how to connect
the ST1284-xxA8 in order to correctly terminate and filter the 17 signal lines. The IEEE1284-A connec-
tor is the PC standard for the host connection.
Control and status lines (from 10 to 17) only require a pull-up resistor (Rp) and a filter capacitor (C).
The data lines (from 2 to 9) and the STROBE (pin 1) also require a termination series resistor (Rs)
in addition to the pull-up resistor and a filter capacitor. The Vcc is connected to pin 20 and the
ground to pin 22.
The ST1284-xxA8 can be used with all 3 types of connectors defined in the IEEE1284 standard:
- IEEE1284-A is a 25DB connector which is the PC standard for the host connection.
- IEEE1284-B is a 36 pin, 0.085 inch centerline connector used on the peripheral device.
- IEEE1284-C is a new 36 pin, 0.050 inch centerline connector which can be used for both host and
peripherals.
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