常用硬件接口定义规范-I

以下内容,选自:人www.mcuwork.com

1 ．计算机侧为25针公插:

Pin	Name	ITU-T	Dir	Description
1	GND	101	Shield Ground
2	TXD	103	Transmit Data
3	RXD	104	Receive Data
4	RTS	105	Request to Send
5	CTS	106	Clear to Send
6	DSR	107	Data Set Ready
7	GND	102	System Ground
8	CD	109	Carrier Detect
9	-		-	RESERVED
10	-		-	RESERVED
11	STF	126	Select Transmit Channel
12	S.CD	?	Secondary Carrier Detect
13	S.CTS	?	Secondary Clear to Send
14	S.TXD	?	Secondary Transmit Data
15	TCK	114	Transmission Signal Element Timing
16	S.RXD	?	Secondary Receive Data
17	RCK	115	Receiver Signal Element Timing
18	LL	141	Local Loop Control
19	S.RTS	?	Secondary Request to Send
20	DTR	108	Data Terminal Ready
21	RL	140	Remote Loop Control
22	RI	125	Ring Indicator
23	DSR	111	Data Signal Rate Selector
24	XCK	113	Transmit Signal Element Timing
25	TI	142	Test Indicator

 

2 ． PC/AT 机上的串行口是 9 针公插座，引脚定义为：

 

Pin	Name	Dir	Description
1	CD	Carrier Detect
2	RXD	Receive Data
3	TXD	Transmit Data
4	DTR	Data Terminal Ready
5	GND	System Ground
6	DSR	Data Set Ready
7	RTS	Request to Send
8	CTS	Clear to Send
9	RI	Ring Indicator

3．PC 并行接口外观是 25 针母插座：

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

4 ．PS/2 鼠标接口为 6 针母插，外观为：

 

Pin	Name	Dir	Description
1	DATA	" type="#_x0000_t75">	Key Data
2	n/c	-	Not connected
3	GND	Gnd
4	VCC	Power , 5 VDC
5	CLK	Clock
6	n/c	-	Not connected

5．键盘接口为 5 针母插座：

Pin	Name	Description	Technical
1	CLOCK	Clock	CLK/CTS, Open-collector
2	DATA	Data	RxD/TxD/RTS, Open-collector
3	n/c	Not connected	Reset on some very old keyboards.
4	GND	Ground
5	VCC	5 VDC

6．网卡上以及 Hub 上接口的外观为 8 芯母插座 (RJ45)：

网线上插头的外观为 8 芯公插头 (RJ45)：

Pin	Name	Description
1	TX	Tranceive Data ( 发信号 )
2	TX-	Tranceive Data- ( 发信号 -)
3	RX	Receive Data ( 收信号 )
4	n/c	Not connected ( 空脚 )
5	n/c	Not connected ( 空脚 )
6	RX-	Receive Data- ( 收信号 -)
7	n/c	Not connected ( 空脚 )
8	n/c	Not connected ( 空脚 )

7．IDE 是 Integrated Drive Electronics 的缩写，由 Compaq 和 Western Digital 公司开发，新版的 IDE 命名为 ATA 即 AT bus Attachment，IDE 接口在设备和主板侧的外观为 40 脚插针：

Pin	Name	Dir	Description
1	/RESET	Reset
2	GND	Ground
3	DD7	" type="#_x0000_t75">	Data 7
4	DD8	" type="#_x0000_t75">	Data 8
5	DD6	" type="#_x0000_t75">	Data 6
6	DD9	" type="#_x0000_t75">	Data 9
7	DD5	" type="#_x0000_t75">	Data 5
8	DD10	" type="#_x0000_t75">	Data 10
9	DD4	" type="#_x0000_t75">	Data 4
10	DD11	" type="#_x0000_t75">	Data 11
11	DD3	" type="#_x0000_t75">	Data 3
12	DD12	" type="#_x0000_t75">	Data 12
13	DD2	" type="#_x0000_t75">	Data 2
14	DD13	" type="#_x0000_t75">	Data 13
15	DD1	" type="#_x0000_t75">	Data 1
16	DD14	" type="#_x0000_t75">	Data 14
17	DD0	" type="#_x0000_t75">	Data 0
18	DD15	" type="#_x0000_t75">	Data 15
19	GND	Ground
20	KEY	-	Key
21	n/c	-	Not connected
22	GND	Ground
23	/IOW	Write Strobe
24	GND	Ground
25	/IOR	Read Strobe
26	GND	Ground
27	IO_CH_RDY
28	ALE	Address Latch Enable
29	n/c	-	Not connected
30	GND	Ground
31	IRQR	Interrupt Request
32	/IOCS16	?	IO ChipSelect 16
33	DA1	Address 1
34	n/c	-	Not connected
35	DA0	Address 0
36	DA2	Address 2
37	/IDE_CS0	(1F0-1F7)
38	/IDE_CS1	(3F6-3F7)
39	/ACTIVE	Led driver
40	GND	Ground