Slot pictures
PCI Express, referred to as PCI-E, officially referred to as PCIe, is an important branch of the computer bus. The slot picture is as follows:
Pin definition
The following table lists the wires on both sides of the PCI Express card on the edge connector. The solder side of the printed circuit board (PCB) is the A side, and the component side is the B side. The PRSNT1# and PRSNT2# pins must be slightly shorter than the rest to ensure the hot-swappable card is fully inserted. The WAKE# pin uses full voltage to wake the computer, but must be pulled high from backup power to indicate that the card is able to wake
| 引脚 | B侧 | A侧 | 描述 | 引脚 | B侧 | A侧 | 描述 | |
|---|---|---|---|---|---|---|---|---|
| 1 | +12 V | PRSNT1# | 必须连接到最远PRSNT2# 引脚 | 50 | HSOp (8) | Reserved | 通道8传输数据，+和− | |
| 2 | +12 V | +12 V | 51 | HSOn (8) | Ground | |||
| 3 | +12 V | +12 V | 52 | Ground | HSIp (8) | 通道8接收数据，+和− | ||
| 4 | Ground | Ground | 53 | Ground | HSIn (8) | |||
| 5 | SMCLK | TCK | SMBus和JTAG端口引脚 | 54 | HSOp (9) | Ground | 通道9传输数据，+和− | |
| 6 | SMDAT | TDI | 55 | HSOn (9) | Ground | |||
| 7 | Ground | TDO | 56 | Ground | HSIp (9) | 通道9接收数据，+和− | ||
| 8 | +3.3 V | TMS | 57 | Ground | HSIn (9) | |||
| 9 | TRST# | +3.3 V | 58 | HSOp (10) | Ground | 通道10传输数据，+和− | ||
| 10 | +3.3 V aux | +3.3 V | 备用电源 | 59 | HSOn (10) | Ground | ||
| 11 | WAKE# | PERST# | 链接激活；基本复位 | 60 | Ground | HSIp (10) | 通道10接收数据，+和− | |
| Key notch | 61 | Ground | HSIn (10) | |||||
| 12 | CLKREQ# | Ground | 要求运行的时钟 | 62 | HSOp (11) | Ground | 通道11传输数据，+和− | |
| 13 | Ground | REFCLK+ | 参考时钟差分对 | 63 | HSOn (11) | Ground | ||
| 14 | HSOp (0) | REFCLK− | 64 | Ground | HSIp (11) | 通道11接收数据，+和− | ||
| 15 | HSOn (0) | Ground | 65 | Ground | HSIn (11) | |||
| 16 | Ground | HSIp (0) | 通道0接收数据，+和− | 66 | HSOp (12) | Ground | 通道12传输数据，+和− | |
| 17 | PRSNT2# | HSIn (0) | 67 | HSOn (12) | Ground | |||
| 18 | Ground | Ground | 68 | Ground | HSIp (12) | 通道12接收数据，+和− | ||
| PCI Express ×1卡于引脚18结束 | 69 | Ground | HSIn (12) | |||||
| 19 | HSOp (1) | Reserved | 通道1传输数据，+和− | 70 | HSOp (13) | Ground | 通道13传输数据，+和− | |
| 20 | HSOn (1) | Ground | 71 | HSOn (13) | Ground | |||
| 21 | Ground | HSIp (1) | 通道1接收数据，+和− | 72 | Ground | HSIp (13) | 通道13接收数据，+和− | |
| 22 | Ground | HSIn (1) | 73 | Ground | HSIn (13) | |||
| 23 | HSOp (2) | Ground | 通道2传输数据，+和− | 74 | HSOp (14) | Ground | 通道14传输数据，+和− | |
| 24 | HSOn (2) | Ground | 75 | HSOn (14) | Ground | |||
| 25 | Ground | HSIp (2) | 通道2接收数据，+和− | 76 | Ground | HSIp (14) | 通道14接收数据，+和− | |
| 26 | Ground | HSIn (2) | 77 | Ground | HSIn (14) | |||
| 27 | HSOp (3) | Ground | 通道3传输数据，+和− | 78 | HSOp (15) | Ground | 通道15传输数据，+和− | |
| 28 | HSOn (3) | Ground | 79 | HSOn (15) | Ground | |||
| 29 | Ground | HSIp (3) | 通道3接收数据，+和− | 80 | Ground | HSIp (15) | 通道15接收数据，+和− | |
| 30 | Reserved | HSIn (3) | 81 | PRSNT2# | HSIn (15) | |||
| 31 | PRSNT2# | Ground | 82 | Reserved | Ground | |||
| 32 | Ground | Reserved | ||||||
| PCI Express ×4卡于引脚32结束 | ||||||||
| 33 | HSOp (4) | Reserved | 通道4传输数据，+和− | |||||
| 34 | HSOn (4) | Ground | ||||||
| 35 | Ground | HSIp (4) | 通道4接收数据，+和− | |||||
| 36 | Ground | HSIn (4) | ||||||
| 37 | HSOp (5) | Ground | 通道5传输数据，+和− | |||||
| 38 | HSOn (5) | Ground | ||||||
| 39 | Ground | HSIp (5) | 通道5接收数据，+和− | |||||
| 40 | Ground | HSIn (5) | ||||||
| 41 | HSOp (6) | Ground | 通道6传输数据，+和− | |||||
| 42 | HSOn (6) | Ground | ||||||
| 43 | Ground | HSIp (6) | 通道6接收数据，+和− | 图例 | ||||
| 44 | Ground | HSIn (6) | 接地引脚 | 零电压基准 | ||||
| 45 | HSOp (7) | Ground | 通道7传输数据，+和− | 电源引脚 | 为PCIe卡供电 | |||
| 46 | HSOn (7) | Ground | 输出引脚 | 从PCIe卡到主板的信号 | ||||
| 47 | Ground | HSIp (7) | 通道7接收数据，+和− | 输入引脚 | 从主板到PCIe卡的信号 | |||
| 48 | PRSNT2# | HSIn (7) | 漏极开路 | 可拉至低电平或感应到多个卡 | ||||
| 49 | Ground | Ground | 检测引脚 | 卡连接在一起 | ||||
| PCI Express ×8卡于引脚49结束 | 备用 | 目前没有使用，不连接 | ||||||