并行接口定义
计算机并行接口外观是 25 针母插座，(见下图)，顾名思义并行口传输的是并行数据8位数据同时传输，数据位是从D0到D8一共8位,其他的控制位有很多。我们常见的电脑打印机一般都是使用计算机并行接口的.
计算机并行口
|
Pin |
Name |
Dir |
Description |
|---|---|---|---|
|
1 |
/STROBE |
|
Strobe |
|
2 |
D0 |
|
Data Bit 0 |
|
3 |
D1 |
|
Data Bit 1 |
|
4 |
D2 |
|
Data Bit 2 |
|
5 |
D3 |
|
Data Bit 3 |
|
6 |
D4 |
|
Data Bit 4 |
|
7 |
D5 |
|
Data Bit 5 |
|
8 |
D6 |
|
Data Bit 6 |
|
9 |
D7 |
|
Data Bit 7 |
|
10 |
/ACK |
|
Acknowledge |
|
11 |
BUSY |
|
Busy |
|
12 |
PE |
|
Paper End |
|
13 |
SEL |
|
Select |
|
14 |
/AUTOFD |
|
Autofeed |
|
15 |
/ERROR |
|
Error |
|
16 |
/INIT |
|
Initialize |
|
17 |
/SELIN |
|
Select In |
|
18 |
GND |
|
Signal Ground |
|
19 |
GND |
|
Signal Ground |
|
20 |
GND |
|
Signal Ground |
|
21 |
GND |
|
Signal Ground |
|
22 |
GND |
|
Signal Ground |
|
23 |
GND |
|
Signal Ground |
|
24 |
GND |
|
Signal Ground |
|
25 |
GND |
|
Signal Ground |