The geographical pin-out diagrams are useful when describing the controller hardware. However, the GPIOs are not all made equal, we see that there are three different voltage levels, and some GPIOs support interrupts and some GPIOs have special functions such as i2c or UARTs, an alternate diagram, where the GPIOs are ordered by voltage level and port-number and thus related special functions, can be more useful.
In addition to the actual programmable GPIOs, there are other connections present, these are also shown here.
Pin numbers legend
| P | PI-2-BUS | (40) |
| E | Euler Bus | (34) |
| X | Expansion Connector | (10) |
| W | Wifi | (14) |
| B | Bluetooth | (16) |
| T | TP connector | (6) |
| P8 PB0 G32 (E) UART2_TX |
| P10 PB1 G33 (E) UART2_RX |
| E27 PB2 G34 (E) UART2_RTS |
| E11 PB3 G35 (E) UART2_CTS I2S_MCK |
| E12 PB4 G36 (E) I2S_SYNC |
| E13 PB5 G37 (E) I2S_BCK |
| E15 PB6 G38 (E) I2S_DOUT |
| E16 PB7 G39 (E) I2S_DIN |
| E29 PB8 G40 (E) UART0_TX |
| X7 PB8 G40 (E) UART0_TX |
| E30 PB9 G41 (E) UART0_RX |
| X8 PB9 G41 (E) UART0_RX (G) |
| T3 PH0 G224 (E) TWI0_SCL |
| T4 PH1 G225 (E) TWI0_SDA |
| P5 PH2 G226 (E) TWI1_SCL |
| P3 PH3 G227 (E) TWI1_SDA |
| T2 PH4 G228 (E) CTP_INT |
| P29 PH5 G229 (E) |
| P31 PH6 G230 (E) |
| P26 PH7 G231 (E) SPK Note 1 |
| E10 PH8 G232 (E) SPDIF OWA_OUT |
| P13 PH9 G233 (E) |
| T1 PH11 G235 (E) CTP_RST |
| P19 PC0 G64 SPI0_MOSI |
| P21 PC1 G65 SPI0_MISO |
| P23 PC2 G66 SPI0_CLK |
| P24 PC3 G67 SPI0_CS |
| P32 PC4 G68 |
| P33 PC5 G69 |
| P36 PC6 G70 |
| P11 PC7 G71 |
| P12 PC8 G72 1w |
| P35 PC9 G73 |
| P38 PC10 G74 |
| P40 PC11 G75 |
| P15 PC12 G76 |
| P16 PC13 G77 |
| P18 PC14 G78 |
| P22 PC15 G79 |
| P37 PC16 G80 |
Note 1: The PH7/GPIO231 on P26 has been seen as being set as Output and used by something identifying itself as SPK from /sys/kernel/debug/gpio In the device-tree file, this relates to something identified as codec@0 there. Which further shows as a device at 0x01c22c00, identified as "AC", Audio Codec in the documentation, page 280. This is associated with the internal sound-card.
| E24 PD0 G96 UART3_TX SPI1_CS |
| E23 PD1 G97 UART3_RX SPI1_SCK |
| E19 PD2 G98 UART4_TX SPI1_MOSI |
| E21 PD3 G99 UART4_RX SPI1_MISO |
| E18 PD4 G100 UART4_RTS |
| E22 PD5 G101 UART4_CTS |
| E26 PD6 G102 |
| E28 PD7 G103 |
| W3 PG0 G192 (E) SDC1-CK SDIO-CLK |
| W7 PG1 G193 (E) SDC1-CMD SDIO-CMD |
| W2 PG2 G194 (E)SDC1-D0 SDIO-D0 |
| W4 PG3 G195 (E) SDC1-D1 SDIO-D1 |
| W6 PG4 G196 (E) SDC1-D2 SDIO-D2 |
| W8 PG5 G197 (E) SDC1-D3 SDIO-D3 |
| B2 PG6 G198 (E) UART1-TX BT-UART-RX |
| B4 PG7 G199 (E) UART1-RX BT-UART-TX |
| B6 PG8 G200 (E) UART1-RTS BT-UART-CTS |
| B8 PG9 G201 (E) UART1-CTS BT-UART-RTS |
| B1 PG10 G202 (E) AIF3-SYNC PCB1-SYNC BT-PCM-SYNC |
| B3 PG11 G203 (E) AIF3-CLK PCB1-BCLK BT-PCM-BCLK |
| B5 PG12 G204 (E) AIF3-DOUT PCB1-DOUT BT-PCM-DIN |
| B7 PG13 G205 (E) AIF3-DIN PCB1-DIN BT-PCM-DOUT |
| W9 PL2 G354 (E) S-UART-TX WL-REG-ON |
| W11 PL3 G355 (E) S-UART-RX WL-WAKE-AP |
| B12 PL4 G356 (E) S-JTAG-MS BT-RST-N |
| B11 PL5 G357 (E) S-JTAG-CK BT-WAKE-AP |
| B13 PL6 G358 (E) S-JTAG-DO AP-WAKE-BT |
| X2 PL7 G359 (E) System LED -K |
| P28 PL8 G360 (E) S_TWI_SCK |
| P27 PL9 G361 (E) S_TWI_SDA |
| P7 PL10 G362 (E) S_PWM |
| E7 PL11 G363 (E) IR_RX |
| P6 Gnd |
| P9 Gnd |
| P14 Gnd |
| P20 Gnd |
| P25 Gnd |
| P30 GND |
| P34 GND |
| P39 Gnd |
| E6 Gnd |
| E9 Gnd |
| E14 Gnd |
| E20 Gnd |
| E25 Gnd |
| E34 GND |
| X6 Gnd |
| X9 Gnd |
| W1 GND |
| W5 GND |
| W12 GND |
| B9 GND |
| B10 GND |
| B15 GND |
| B16 GND |
| T6 Gnd |
| P1 3.3V |
| P17 3.3V |
| E1 3.3V |
| E17 3.3V |
| X1 3.3V |
| T5 VCC-CTP (3.3V) |
| P2 5.0V |
| P4 5.0V |
| E8 5 V |
| W13 VCC-WIFI (3.3V) |
| W14 VCC-WIFI (3.3V) |
| B14 VCC-WIFI-IO (1.8V) |
| E2 DC IN |
| E4 DC IN |
| E3 Lithium Batt+ |
| X3 Charger LED -K |
| X4 Reset Sw |
| X5 Pwr Stb Sw |
| X10 KeyADC |
| E5 Temp Sensor |
| W10 X32KFOUT AP-CK32KO |
| E31 EAROUTP |
| E32 EAROUTN |
| E33 NC |
