ECP并行口是 Extended Capabilities Port 的縮寫，外觀同并行口，是 25 針母插座：
ECP模式并行口
ECP：擴展性能端口,ECP擴充型工作模式，ECP采用雙向全雙工數(shù)據(jù)傳輸，傳輸速率比EPP還要高一些
|
ECP并行口信號定義 |
|
Pin |
Name |
Dir |
Description |
|---|---|---|---|
|
1 |
nStrobe |
|
Strobe |
|
2 |
data0 |
|
Address, Data or RLE Data Bit 0 |
|
3 |
data1 |
|
Address, Data or RLE Data Bit 1 |
|
4 |
data2 |
|
Address, Data or RLE Data Bit 2 |
|
5 |
data3 |
|
Address, Data or RLE Data Bit 3 |
|
6 |
data4 |
|
Address, Data or RLE Data Bit 4 |
|
7 |
data5 |
|
Address, Data or RLE Data Bit 5 |
|
8 |
data6 |
|
Address, Data or RLE Data Bit 6 |
|
9 |
data7 |
|
Address, Data or RLE Data Bit 7 |
|
10 |
/nAck |
|
Acknowledge |
|
11 |
Busy |
|
Busy |
|
12 |
PError |
|
Paper End |
|
13 |
Select |
|
Select |
|
14 |
/nAutoFd |
|
Autofeed |
|
15 |
/nFault |
|
Error |
|
16 |
/nInit |
|
Initialize |
|
17 |
/nSelectIn |
|
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 |
如果計算機配有ECP或EPP并行口，那么當用DCC(直接電纜連接)聯(lián)網(wǎng)時，它大約可以達到以太網(wǎng)鏈路速率的三分之一(標準的每秒10兆比特的以太網(wǎng)絡一般能提供350KB/s～400KB/s的實際通信吞吐能力)。三種接口中，其中ECP和EPP都是普通標準并行口（Normal）增強方式。它們分別改善了原來并行口的一些弱點，并和原來的模式相兼容。所有的新PC上都配置了支持EPP和ECP的并行口。標準的并行口一般用來在PC與打印機之間傳送數(shù)據(jù)。而EPP在輸入或輸出數(shù)據(jù)時表現(xiàn)得很出色。如果您在使用外置式驅動器（例如活動硬盤），