บทที่ 2 การกำหนด Pin
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | VDDA | P | Analog Power 2.5V ~ 3.6V |
| 2 | LNA | I/O | RF antenna interfaceChip output impedance=39+6j Ω.It is suggested to retain the π-type matching network to match the antenna. |
| 3 | VDD3P3 | P | Amplifier Power 2.5V ~ 3.6V |
| 4 | VDD3P3 | P | Amplifier Power 2.5V ~ 3.6V |
| 5 | VDD_RTC | P | NC(1.1V) |
| 6 | TOUT | I | ADC pin.It can be used to test the power-supply voltage of VDD3P3(Pin3 and Pin4)and the input power voltage of TOUT(Pin 6).However, these two functions cannot be used simultaneously. |
| 7 | CHIP_PU | I | Chip EnableHigh:On, chip works properlyLow:Off, small current consumed |
| 8 | XPD_DCDC | I/O | Deep-sleep wakeup(need to be connected to EXT_RSTB); GPIO16 |
| 9 | MTMS | I/O | GPIO 14; HSPI_CLK |
| 10 | MTDI | I/O | GPIO 12; HSPI_MISO |
| 11 | VDDPST | P | Digital/IO Power Supply(1.8V ~ 3.3V) |
| 12 | MTCK | I/O | GPIO 13; HSPI_MOSI; UART0_CTS |
| 13 | MTDO | I/O | GPIO 15; HSPI_CS; UART0_RTS |
| 14 | GPIO2 | I/O | UART Tx during flash programming; GPIO2 |
| 15 | GPIO0 | I/O | GPIO0; SPI_CS2 |
| 16 | GPIO4 | I/O | GPIO 4 |
| 17 | VDDPST | P | Digital/IO Power Supply(1.8V ~ 3.3V) |
| 18 | SDIO_DATA_2 | I/O | Connect to SD_D2(Series R:200Ω); SPIHD; HSPIHD; GPIO 9 |
| 19 | SDIO_DATA_3 | I/O | Connect to SD_D3(Series R:200Ω); SPIWP; HSPIWP; GPIO 10 |
| 20 | SDIO_CMD | I/O | Connect to SD_CMD(Series R:200Ω); SPI_CS0; GPIO 11 |
| 21 | SDIO_CLK | I/O | Connect to SD_CLK(Series R:200Ω); SPI_CLK; GPIO 6 |
| 22 | SDIO_DATA_0 | I/O | Connect to SD_D0(Series R:200Ω); SPI_MSIO; GPIO 7 |
| 23 | SDIO_DATA_1 | I/O | Connect to SD_D1(Series R:200Ω); SPI_MOSI; GPIO 8 |
| 24 | GPIO5 | I/O | GPIO 5 |
| 25 | U0RXD | I/O | UART Rx during flash programming; GPIO 3 |
| 26 | U0TXD | I/O | UART Tx during flash programming; GPIO 1; SPI_CS1 |
| 27 | XTAL_OUT | I/O | Connect to crystal oscillator output, can be used to provide BT clock input |
| 28 | XTAL_IN | I/O | Connect to crystal oscillator input |
| 29 | VDDD | P | Analog Power 2.5V ~ 3.6V |
| 30 | VDDA | P | Analog Power 2.5V ~ 3.6V |
| 31 | RES12K | I | Serial connection with a 12 kΩ resistor and connect to the ground |
| 32 | EXT_RSTB | I | External reset signal(Low voltage level:Active) |
| 33 | GND |
_หมายเหตุ
_GPIO2, GPIO0, และ MTDO สามารถกำหนดค่าได้บน PCB ในรูปแบบการลงทะเบียนรัดแบบ 3 บิตที่กำหนดโหมดบูธและโหมดจับเวลา SDIO