尺寸
P4M-400由四个6 x 2排针(P1至P4)接口组成。 引脚间隔是2 mm。
P1
| Pin# | Name | I/O | Description |
|---|---|---|---|
| P1.1 | GND | - | Ground |
| P1.2 | GND | - | Ground |
| P1.3 | TPTX+ | In/Out | Ethernet Transmit + |
| P1.4 | TPTX- | In/Out | Ethernet Transmit - |
| P1.5 | TPRX+ | In/Out | Ethernet Receive + |
| P1.6 | TPRX- | In/Out | Ethernet Receive - |
| P1.7 | GND | - | Ground |
| P1.8 | GND | - | Ground |
| P1.9 | USB_H_D+ | In/Out | USB Host Data + |
| P1.10 | USB_H_D- | In/Out | USB Host Data - |
| P1.11 | USB_D_D+ | In/Out | USB Device Data + |
| P1.12 | USB_D_D- | In/Out | USB Device Data - |
P2
| Pin# | Name | I/O | Description |
|---|---|---|---|
| P2.1 | VBUS | In | USB Device VBUS |
| P2.2 | +3.3V | - | +3.3V Power Input |
| P2.3 | HT0(1.6) | In/Out | UIO 1.6 / Hardware Timer/Counter 0 |
| P2.4 | HT1(1.7) | In/Out | UIO 1.7 / Hardware Timer/Counter 1 |
| P2.5 | HT2(1.8) | In/Out | UIO 1.8 / Hardware Timer/Counter 2 |
| P2.6 | HT3(1.9) | In/Out | UIO 1.9 / Hardware Timer/Counter 3 |
| P2.7 | UIO(0.14) | In/Out | UIO 0.14 |
| P2.8 | SRO(0.15) | In/Out | UIO 0.15 / Slave Reset Out |
| P2.9 | ISP# | In | ISP Input (Active LOW) |
| P2.10 | DTX | Out | Debug Out (UART) |
| P2.11 | RESET# | In | Reset Input (Active LOW) |
| P2.12 | VBAT | In | Battery Input |
P3
| Pin# | Name | I/O | Description |
|---|---|---|---|
| P3.1 | NSS(0.0) | In/Out | UIO 0.0 / SPI NSS |
| P3.2 | SCK(0.1) | In/Out | UIO 0.1 / SPI SCK |
| P3.3 | MISO(0.2) | In/Out | UIO 0.2 / SPI MISO |
| P3.4 | MOSI(0.3) | In/Out | UIO 0.3 / SPI MOSI |
| P3.5 | U0TX(0.4) | In/Out | UIO 0.4 / UART0 TX |
| P3.6 | U0RX(0.5) | In/Out | UIO 0.5 / UART0 RX |
| P3.7 | SCL(0.6) | In/Out | UIO 0.6 / I2C SCL |
| P3.8 | SDA(0.7) | In/Out | UIO 0.7 / I2C SDA |
| P3.9 | U0RTS(0.8) | In/Out | UIO 0.8 / UART0 RTS |
| P3.10 | U0CTS(0.9) | In/Out | UIO 0.9 / UART0 CTS |
| P3.11 | U1TX(0.10) | In/Out | UIO 0.10 / UART1 TX |
| P3.12 | U1RX(0.11) | In/Out | UIO 0.11 / UART1 RX |
P4
| Pin# | Name | I/O | Description |
|---|---|---|---|
| P4.1 | U1RTS(0.12) | In/Out | UIO 0.12 / UART1 RTS |
| P4.2 | U1CTS(0.13) | In/Out | UIO 0.13 / UART1 CTS |
| P4.3 | STX(1.10) | In/Out | UIO 1.10 / Slave TX |
| P4.4 | SRX(1.11) | In/Out | UIO 1.11 / Slave RX |
| P4.5 | GND | - | Ground |
| P4.6 | GND | - | Ground |
| P4.7 | +3.3V | - | +3.3V Power Input |
| P4.8 | AREF | In | ADC Reference Input |
| P4.9 | ADC0(1.0) | In/Out | UIO 1.0 / ADC0 |
| P4.10 | ADC1(1.1) | In/Out | UIO 1.1 / ADC1 |
| P4.11 | ADC2(1.2) | In/Out | UIO 1.2 / ADC2 |
| P4.12 | ADC3(1.3) | In/Out | UIO 1.3 / ADC3 |
LED
模块的中央下端由用户定义LED。 此LED上连接了UIO 0.31，产品出厂时作为状态标示用LED设定后出厂。 根据需要可设定为输出端口，输出LOW时LED亮。