^  RS485&232                 ||   ^  J_LED-IR1                  |^  J_GPIO1                 |^  SPK1                     |^  UART1                   ||
| 1           | RS485_A1      |   | 1           | VCC3_IR        | 1         | GPIO1         | 1        | L_SPK+          | 1         | UART0_RX_CON  |
| 2           | RS485_B1      |   | 2           | IR             | 2         | GPIO3         | 2        | L_SPK-          | 2         | UART0_TX_CON  |
| 3           | RS485_A2      |   | 3           | GND            | 3         | GPIO2         | 3        | R_SPK+          | 3         | VCC3_TTL      |
| 4           | RS485_B2      |   | 4           | AD             | 4         | GPIO4         | 4        | R_SPK-          | 4         | GND           |
| 5           | UART_RX3_232  |   | 5           | LEDB           | 5         | SPI2_MOSI_CN  ^  J_KEY1                   |^  J_RS232                 ||
| 6           | UART_TX3_232  |   | 6           | P_LED          | 6         | SPI2_MISO_CN  | 1        | GND             | 1         | UART_RX5_232  |
| 7           | UART_RX4_232  |   ^  I2C-TP                     || 7         | SPI2_CLK_CN   | 2        | P3V3            | 2         | UART_TX5_232  |
| 8           | UART_TX4_232  |   | 1           | GND            | 8         | SPI2_CS_CN    | 3        | POWER_ON_BT     | 3         | VCC5_232      |
| 9           | GND           |   | 2           | I2C1_SDA_TP_C  | 9         | VCC5_GPIO     | 4        | Reset           | 4         | GND           |
| 10          | GND           |   | 3           | I2C1_SCL_TP_C  | 10        | VCC5_GPIO     | 5        | RECOVER_BUTTON  ^  PUSB                    ||
^  debug                     ||   | 4           | TP_RST_C       | 11        | GND           ^  HOST1                    || 1         | USB_VCC5      |
| 1           | NC            |   | 5           | TP_INT_C       | 12        | GND           | 1        | HOST1_VCC5      | 2         | USB_D2N       |
| 2           | UART2_TX_     |   | 6           | TP_VDD         |           |               | 2        | HOST1_D1N_CON   | 3         | USB_D2P       |
| 3           | UART2_RX      |   |             |                |           |               | 3        | HOST1_D1P_CON   | 4         | GND           |
| 4           | GND           |   |             |                |           |               | 4        | GND             |           |               |