I have Rock Pi E v1.1 which was an engineering version, it has a micro hdmi and a wifi, such a nice board, hardware acceleration and hardware encoder / decoder seems to be working but later radxa decided to remove the micro hdmi.
Now, I’ve decided to revive the board for a project. The project needs two PWMs, but the Rock Pi E has pwm_ir and pwm2.
My question for the hardware experts is: can I use pwm_ir as a PWM? pwm_ir is linked to pwm3, so changing it to pwm3 seems feasible, but will it work as a PWM?
Key GPIO and Power Pin Assignments (V1.0/V1.1 & V1.2)
| Pin # | V1.0/V1.1 Function | V1.2 Function | Notes |
|---|---|---|---|
| 1 | +3.3V | +3.3V | Power |
| 2 | +5.0V | +5.0V | Power |
| 3 | I2C1_SDA / GPIO2_A4 | UART1_TX / GPIO3_A4 | V1.2 uses UART |
| 4 | +5.0V | +5.0V | Power |
| 5 | I2C1_SCL / GPIO2_A5 | UART1_RX / GPIO3_A6 | V1.2 uses UART |
| 6 | GND | GND | Ground |
| 7 | GPIO2_A0 / UART2_TX_M1 | GPIO1_D4 | Power/GPIO |
| 8 | GPIO2_A1 / UART2_RX_M1 | GND | Power/GPIO |
| 9 | GND | GND | Ground |
| 10 | GPIO2_D2 / SPI0_CLK | GPIO2_C2 | V1.1 sleep pin |
| 11 | SPI0_CLK / GPIO3_A0 | GPIO2_C2 | V1.2 alternate |
| 12 | GPIO2_D2 | GPIO2_C2 | PMIC Sleep Pin |
| 13 | SPI0_CSN0 / GPIO3_B0 | GND | V1.2 Ground |
| 14 | GND | GND | Ground |
| 15 | SPI0_RXD / GPIO3_A2 | GPIO0_D3 | V1.2 alternate |
| 16 | USB20DM | USB20DP | V1.2 alternate |
| 17 | +3.3V | +3.3V | Power |
| 18 | USB20DP | USB20DP | Power |
| 19 | GPIO0_D3 / SPDIF_TX_M0 | GPIO3_A1 | V1.2 alternate |
| 20 | GND | GND | Ground |
| 21 | GPIO2_C3 / I2S1_SDI | GPIO3_A2 | V1.2 alternate |
| 22 | GPIO2_B4 | ADC_IN1 | V1.2 alternate |
| 23 | GPIO1_D4 / CLK32KOUT_M1 | GPIO3_B0 | V1.2 alternate |
| 24 | GPIO2_A3 | SPI0_CLK | V1.2 alternate |
| 25 | GND | GND | Ground |
| 26 | GPIO2_C7 / I2S1_SDO | SPI0_CSN0 | V1.2 alternate |
| 27 | GPIO3_A1 / SPI0_TXD | GPIO2_A5 | V1.2 alternate |
| 28 | GPIO2_C1 / I2S1_LRCK_TX | I2C1_SDA | V1.2 alternate |
| 29 | GPIO2_C0 / I2S1_LRCK_RX | I2C1_SCL | V1.2 alternate |
| 30 | GND | GND | Ground |
| 31 | GPIO3_A6 / I2S1_MCLK | GPIO2_A6 | V1.2 alternate |
| 32 | GPIO2_B7 / TSP_SYNC_M1 | GND | V1.2 alternate |
| 33 | GPIO2_C5 / ADC_IN1 | GPIO2_C4 | V1.2 alternate |
| 34 | GND | GND | Ground |
| 35 | GPIO2_C6 / I2S1_SDIO2 | GPIO2_C0 | V1.2 alternate |
| 36 | GPIO2_C4 / I2S1_SDIO1 | GPIO2_B7 | V1.2 alternate |
| 37 | GPIO2_A2 / IR_RX | GPIO2_C3 | V1.2 alternate |
| 38 | GPIO2_C4 / I2S1_SDIO1 | GPIO2_C7 | V1.2 alternate |
| 39 | GND | GND | Ground |
| 40 | GPIO2_C6 / I2S1_SDIO3 | GPIO2_C7 | V1.2 alternate |
From Radxa:
** Note: Actual compatibility is based on usage. ** ** Note: 40-Pin GPIO for V1.20, V1.21 and V3.0 are functionally identical **
| GPIO Number | Function3 | Function2 | Function1 | Pin# | Pin# | Function1 | Function2 | Function3 | GPIO Number |
|---|---|---|---|---|---|---|---|---|---|
| +3.3V | 1 | 2 | +5.0V | ||||||
| 100 | UART1_TX | GPIO3_A4 | 3 | 4 | +5.0V | ||||
| 102 | UART1_RX | GPIO3_A6 | 3 | 6 | GND | ||||
| 60 | GPIO1_D4 | 7 | 8 | GPIO2_A0 | UART2_TX | 64 | |||
| GND | 9 | 10 | GPIO2_A1 | UART2_RX | 65 | ||||
| 66 | PWM_IR | GPIO2_A2 | 11 | 12 | GPIO2_C2 | PDM_CLK | I2S_SCLK | 82 | |
| 67 | GPIO2_A3 | 13 | 14 | GND | |||||
| 27 | GPIO0_D3 | 15 | 16 | USB20DM | |||||
| +3.3V | 17 | 18 | USB20DP | ||||||
| 97 | SPI0_TXD | GPIO3_A1 | 19 | 20 | GND | ||||
| 98 | SPI0_RXD | GPIO3_A2 | 21 | 22 | ADC_IN1 | ||||
| 96 | SPI0_CLK | GPIO3_A0 | 23 | 24 | GPIO3_B0 | SPI0_CSN0 | 104 | ||
| GND | 25 | 26 | GPIO2_B4 | 76 | |||||
| 68 | I2C1_SDA | GPIO2_A4 | 27 | 28 | GPIO2_A5 | I2C1_SCL | 69 | ||
| 84 | I2S1_SDIO1 | PDM_SDI1 | GPIO2_C4 | 29 | 30 | GND | |||
| 85 | I2S1_SDIO2 | PDM_SDI2 | GPIO2_C5 | 31 | 32 | GPIO2_C0 | I2S1_LRCK_RX | 80 | |
| 70 | PWM2 | GPIO2_A6 | 33 | 34 | GND | ||||
| 81 | I2S1_LRCK_TX | GPIO2_C1 | 35 | 36 | GPIO2_B7 | I2S1_MCLK | 79 | ||
| 86 | PDM_SDI3 | GPIO2_C6 | 37 | 38 | GPIO2_C3 | PDM_SDIO | I2S1_SDI | 83 | |
| GND | 39 | 40 | GPIO2_C7 | PDM_FSYNC | I2S1_SDO | 87 |