Expansion Connectors
The XU3/XU4 provides one 30-pin dual row expansion header “CON10”.
The location and pinout of these connectors is illustrated below. All signals on expansion headers are 1.8V except PWRON signal.
CON 10 - 2x15 pins
| Default Pin State | GPIO & Export No | Net Name | Pin Number | Pin Number | Net Name | GPIO & Export No | Default Pin State |
|---|---|---|---|---|---|---|---|
| - | - | 5V0 | 1 | 2 | GND | - | - |
| I | XADC0AIN_0 | ADC_0.AIN0 | 3 | 4 | UART_0.CTSN | GPA0.2 (#173) | I(PUDN) |
| I(PUDN) | GPA0.3 (#174) | UART_0.RTSN | 5 | 6 | UART_0.RXD | GPA0.0 (#171) | I(PUDN) |
| I(PUDN) | GPA2.7 (#192) | SPI_1.MOISI | 7 | 8 | UART_0.TXD | GPA0.1 (#172) | I(PUDN) |
| I(PUDN) | GPA2.6 (#191) | SPI_1.MISO | 9 | 10 | SPI_1.CLK | GPA2.4 (#189) | I(PUDN) |
| I(PUDN) | GPA2.5 (#190) | SPI_1.CSN | 11 | 12 | PWRON | Input Range (1.8V ~ 5V) | I |
| I(PUDN) | GPX1.5 (#21) | XE.INT13 | 13 | 14 | I2C_1.SCL | GPB3.3 (#210) | I(PUDN) |
| I(PUDN) | GPX1.2 (#18) | XE.INT10 | 15 | 16 | I2C_1.SDA | GPB3.2 (#209) | I(PUDN) |
| I(PUDN) | GPX1.6 (#22) | XE.INT14 | 17 | 18 | XE.INT11 | GPX1.3 (#19) | I(PUDN) |
| I(PUDN) | GPX2.6 (#30) | XE.INT22 | 19 | 20 | XE.INT20 | GPX2.4 (#28) | I(PUDN) |
| I(PUDN) | GPX2.5 (#29) | XE.INT21 | 21 | 22 | XE.INT23 | GPX2.7 (#31) | I(PUDN) |
| I | XADC0AIN_3 | ADC_0.AIN3 | 23 | 24 | XE.INT17 | GPX2.1 (#25) | I(PUDN) |
| I(PUDN) | GPX1.7 (#23) | XE.INT15 | 25 | 26 | XE.INT16 | GPX2.0 (#24) | I(PUDN) |
| I(PUDN) | GPX3.1 (#33) | XE.INT25 | 27 | 28 | GND | - | - |
| - | - | VDD_IO(1.8V) | 29 | 30 | GND | - | - |
CON 11 - 2x6 pins
CON11 is available only in XU4 not XU3.
All signals on expansion headers are 1.8V
| Default Pin State | GPIO & Export No | Net Name | Pin Number | Pin Number | Net Name | GPIO & Export No | Default Pin State |
|---|---|---|---|---|---|---|---|
| - | - | 5V0 | 1 | 2 | GND | - | - |
| - | - | VDD_IO(1.8V) | 3 | 4 | I2C_5.SDA | GPA2.2 (#187) | I(PUDN) |
| I(PUDN) | GPX3.2 (#34) | XE.INT26 | 5 | 6 | I2C_5.SCL | GPA2.3 (#188) | I(PUDN) |
| I(PUDN) | GPZ.0 (#225) | I2S_0.SCLK | 7 | 8 | GND | - | - |
| I(PUDN) | GPZ.1 (#226) | I2S_0.CDCLK | 9 | 10 | I2S_0.SDO | GPZ.4 (#229) | I(PUDN) |
| I(PUDN) | GPZ.2 (#227) | I2S_0.LRCK | 11 | 12 | I2S_0.SDI | GPZ.3 (#228) | I(PUDN) |
GPIO Map for WiringPi Library (CON10 2 x 15)
| Net Name | GPIO & Export No | WiringPi GPIO | Header Pin | Header Pin | WiringPi GPIO | GPIO & Export No | Net Name |
|---|---|---|---|---|---|---|---|
| 5V0 | 5V0 | 1 | 2 | GND | GND | ||
| ADC_0.AIN0 | AIN0(1.8V Max) | GPIO_25 | 3 | 4 | GPIO_01 | GPA0.2(#173) | UART_0.RTSN |
| UART_0.CTSN | GPA0.3(#174) | GPIO_00 | 5 | 6 | GPIO_16 | GPA0.0(#171) | UART_0.RXD |
| SPI_1.MOSI | GPA2.7(#192) | GPIO_12 | 7 | 8 | GPIO_15 | GPA0.1(#172) | UART_0.TXD |
| SPI_1.MISO | GPA2.6(#191) | GPIO_13 | 9 | 10 | GPIO_14 | GPA2.4(#189) | SPI_1.CLK |
| SPI_1.CSN | GPA2.5(#190) | GPIO_10 | 11 | 12 | PWR_ON(INPUT) | PWR_ON | |
| XE.INT13 | GPX1.5(#21) | GPIO_02 | 13 | 14 | GPIO_09 | GPB3.3(#210) | I2C_1.SCL |
| XE.INT10 | GPX1.2(#18) | GPIO_07 | 15 | 16 | GPIO_08 | GPB3.2(#209) | I2C_1.SDA |
| XE.INT14 | GPX1.6(#22) | GPIO_03 | 17 | 18 | GPIO_19 | GPX1.3(#19) | XE.INT11 |
| XE.INT22 | GPX2.6(#30) | GPIO_22 | 19 | 20 | GPIO_21 | GPX2.4(#28) | XE.INT20 |
| XE.INT21 | GPX2.5(#29) | GPIO_26 | 21 | 22 | GPIO_23 | GPX2.7(#31) | XE.INT23 |
| ADC_0.AIN3 | AIN3(1.8V Max) | GPIO_29 | 23 | 24 | GPIO_11 | GPX2.1(#25) | XE.INT17 |
| XE.INT15 | GPX1.7(#23) | GPIO_05 | 25 | 26 | GPIO_06 | GPX2.0(#24) | XE.INT16 |
| XE.INT25 | GPX3.1(#33) | GPIO_27 | 27 | 28 | GND | GND | |
| VDD_IO | VDD_IO(1.8V) | 29 | 30 | GND | GND |
GPIO Map for WiringPi Library (Shifter-Shield 40 Pin)
| GPIO | WiringPi | Name | Mode | Initial Level | Header Pin | Header Pin | Initial Level | Mode | Name | WiringPi | GPIO |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 3.3V | 1 | 2 | 5v | ||||||||
| 209 | 8 | I2C1.SDA | ALT1 | 1 | 3 | 4 | 5v | ||||
| 210 | 9 | I2C1.SCL | ALT1 | 1 | 5 | 6 | 0v | ||||
| 18 | 7 | GPIO. 18 | IN | 1 | 7 | 8 | 1 | ALT1 | UART0.TX | 15 | 172 |
| 0v | 9 | 10 | 1 | ALT1 | UART0.RX | 16 | 171 | ||||
| 174 | 0 | GPIO.174 | ALT1 | 1 | 11 | 12 | 1 | ALT1 | GPIO.173 | 1 | 173 |
| 21 | 2 | GPIO. 21 | IN | 1 | 13 | 14 | 0v | ||||
| 22 | 3 | GPIO. 22 | IN | 1 | 15 | 16 | 1 | IN | GPIO. 19 | 4 | 19 |
| 3.3v | 17 | 18 | 1 | IN | GPIO. 23 | 5 | 23 | ||||
| 192 | 12 | MOSI | ALT1 | 1 | 19 | 20 | 0v | ||||
| 191 | 13 | MISO | ALT1 | 1 | 21 | 22 | 1 | IN | GPIO. 24 | 6 | 24 |
| 189 | SCLK | ALT1 | 0 | 23 | 24 | 1 | OUT | CE0 | 10 | 190 | |
| 0v | 25 | 26 | 1 | OUT | GPIO. 25 | 11 | 25 | ||||
| 187 | 30 | I2C5.SDA | ALT2 | 1 | 27 | 28 | 1 | ALT2 | I2C_5.SCL | 31 | 188 |
| 28 | 21 | GPIO. 28 | IN | 1 | 29 | 30 | 0v | ||||
| 30 | 22 | GPIO. 30 | IN | 1 | 31 | 32 | 1 | IN | GPIO. 29 | 26 | 29 |
| 31 | 23 | GPIO. 31 | IN | 1 | 33 | 34 | 0v | ||||
| 24 | POWER ON | 35 | 36 | 1 | IN | GPIO. 33 | 27 | 33 | |||
| 25 | AIN.0 | 37 | 38 | 1v8 | 28 | ||||||
| 0v | 39 | 40 | AIN.3 | 29 |
The “gpio readall” shows the pin-map of 40-pin-Shifter-Shield not 30-Pin-header.
joshua