In our "What’s a board?" post, we described various ways that a board could be customized, and in the follow up " i.MX6 Device Tree customization", we showed how we created variants of our boards that re-purpose the parallel LCD pins. We also suggested the use of three common connectors when looking for additional I/O in a custom application.
This post contains the details of the functions available on those three most commonly replaced peripherals (parallel LCD, parallel camera, and Android buttons), and details the functions available on each.
If you’re designing a SOM carrier, or looking to enhance one of our standard boards, we strongly suggest that you look here first to see if these pins will provide what you need. Doing so will simplify your software development and may allow you to test the functionality before spinning a full custom board or SOM carrier.
Android button connector
| Pin | Pad / signal | Volts | Default | ALT0 | ALT1 | ALT2 | ALT3 | ALT4 | ALT5 | ALT6 |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | ON_OFF | N.O. switch | ||||||||
| 2 | KEY_VOL_UP | 3.3V | GP7:13 | ESAI_TX1 | ENET_RX_CLK | SD3_VSELECT | SDMA_EV1 | ASRC_CLK | GP7:13 | SNVS_VIO5 |
| 3 | HOME | 3.3V | GP2:04 | NAND_D04 | SD2_D4 | GP2:04 | ||||
| 4 | SEARCH | 3.3V | GP2:03 | NAND_D03 | SD1_D7 | GP2:03 | ||||
| 5 | BACK | 3.3V | GP2:02 | NAND_D02 | SD1_D6 | GP2:02 | ||||
| 6 | MENU | 3.3V | GP2:01 | NAND_D01 | SD1_D5 | GP2:01 | ||||
| 7 | KEY_VOL_DN | 3.3V | GP4:05 | KEY_COL5 | 1588/OUT | SPDIF_OUT | CLKO1 | SPI1_RDY | GP4:05 | ENET_TX_ER |
| 8 | GND |
J15 (Parallel RGB display)
| Pin | Pad / signal | Volts | Default | ALT0 | ALT1 | ALT2 | ALT3 | ALT4 | ALT5 | ALT6 | ALT7 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | GND | ||||||||||
| 2 | GND | ||||||||||
| 3 | GND | ||||||||||
| 4 | DISP0_CNTRST | 3.3V | N/A | IPU1_DI0_PIN04 | IPU2_DI0_PIN04 | AUD6_RXD | SD1_WP | GP4:20 | |||
| 5 | DISP0_DAT16 | 3.3V | IPU1_DI0_D16 | IPU1_DI0_D16 | IPU2_DI0_D16 | SPI2_MOSI | AUD5_TXC | SDMA_EV0 | GP5:10 | ||
| 6 | DISP0_DAT17 | 3.3V | IPU1_DI0_D17 | IPU1_DI0_D17 | IPU2_DI0_D17 | SPI2_MISO | AUD5_TXD | SDMA_EV1 | GP5:11 | ||
| 7 | DISP0_DAT18 | 3.3V | IPU1_DI0_D18 | IPU1_DI0_D18 | IPU2_DI0_D18 | SPI2_SS0 | AUD5_TXFS | AUD4_RXFS | GP5:12 | EIM_CS2_B | |
| 8 | DISP0_DAT19 | 3.3V | IPU1_DI0_D19 | IPU1_DI0_D19 | IPU2_DI0_D19 | SPI2_SCLK | AUD5_RXD | AUD4_RXC | GP5:13 | EIM_CS3_B | |
| 9 | DISP0_DAT20 | 3.3V | IPU1_DI0_D20 | IPU1_DI0_D20 | IPU2_DI0_D20 | SPI1_SCLK | AUD4_TXC | GP5:14 | |||
| 10 | DISP0_DAT21 | 3.3V | IPU1_DI0_D21 | IPU1_DI0_D21 | IPU2_DI0_D21 | SPI1_MOSI | AUD4_TXD | GP5:15 | |||
| 11 | DISP0_DAT22 | 3.3V | IPU1_DI0_D22 | IPU1_DI0_D22 | IPU2_DI0_D22 | SPI1_MISO | AUD4_TXFS | GP5:16 | |||
| 12 | DISP0_DAT23 | 3.3V | IPU1_DI0_D23 | IPU1_DI0_D23 | IPU2_DI0_D23 | SPI1_SS0 | AUD4_RXD | GP5:17 | |||
| 13 | DISP0_DAT8 | 3.3V | IPU1_DI0_D8 | IPU1_DI0_D8 | IPU2_DI0_D8 | PWM1_OUT | WDOG1_B | GP4:29 | |||
| 14 | DISP0_DAT9 | 3.3V | IPU1_DI0_D9 | IPU1_DI0_D9 | IPU2_DI0_D9 | PWM2_OUT | WDOG2_B | GP4:30 | |||
| 15 | DISP0_DAT10 | 3.3V | IPU1_DI0_D10 | IPU1_DI0_D10 | IPU2_DI0_D10 | GP4:31 | |||||
| 16 | DISP0_DAT11 | 3.3V | IPU1_DI0_D11 | IPU1_DI0_D11 | IPU2_DI0_D11 | GP5:05 | |||||
| 17 | DISP0_DAT12 | 3.3V | IPU1_DI0_D12 | IPU1_DI0_D12 | IPU2_DI0_D12 | GP5:06 | |||||
| 18 | DISP0_DAT13 | 3.3V | IPU1_DI0_D13 | IPU1_DI0_D13 | IPU2_DI0_D13 | AUD5_RXFS | GP5:07 | ||||
| 19 | DISP0_DAT14 | 3.3V | IPU1_DI0_D14 | IPU1_DI0_D14 | IPU2_DI0_D14 | AUD5_RXC | GP5:08 | ||||
| 20 | DISP0_DAT15 | 3.3V | IPU1_DI0_D15 | IPU1_DI0_D15 | IPU2_DI0_D15 | SPI1_SS1 | SPI2_SS1 | GP5:09 | |||
| 21 | DISP0_DAT0 | 3.3V | IPU1_DI0_D0 | IPU1_DI0_D0 | IPU2_DI0_D0 | SPI3_SCLK | GP4:21 | ||||
| 22 | DISP0_DAT1 | 3.3V | IPU1_DI0_D1 | IPU1_DI0_D1 | IPU2_DI0_D1 | SPI3_MOSI | GP4:22 | ||||
| 23 | DISP0_DAT2 | 3.3V | IPU1_DI0_D2 | IPU1_DI0_D2 | IPU2_DI0_D2 | SPI3_MISO | GP4:23 | ||||
| 24 | DISP0_DAT3 | 3.3V | IPU1_DI0_D3 | IPU1_DI0_D3 | IPU2_DI0_D3 | SPI3_SS0 | GP4:24 | ||||
| 25 | DISP0_DAT4 | 3.3V | IPU1_DI0_D4 | IPU1_DI0_D4 | IPU2_DI0_D4 | SPI3_SS1 | GP4:25 | ||||
| 26 | DISP0_DAT5 | 3.3V | IPU1_DI0_D5 | IPU1_DI0_D5 | IPU2_DI0_D5 | SPI3_SS2 | AUD6_RXFS | GP4:26 | |||
| 27 | DISP0_DAT6 | 3.3V | IPU1_DI0_D6 | IPU1_DI0_D6 | IPU2_DI0_D6 | SPI3_SS3 | AUD6_RXC | GP4:27 | |||
| 28 | DISP0_DAT7 | 3.3V | IPU1_DI0_D7 | IPU1_DI0_D7 | IPU2_DI0_D7 | SPI3_RDY | GP4:28 | ||||
| 29 | GND | ||||||||||
| 30 | DISP0_CLK | 3.3V | IPU1_DI0_CLK | IPU1_DI0_CLK | IPU2_DI0_CLK | GP4:16 | |||||
| 31 | GND | ||||||||||
| 32 | DISP0_HSYNC | 3.3V | IPU1_DI0_PIN02 | IPU1_DI0_PIN02 | IPU2_DI0_PIN02 | AUD6_TXD | GP4:18 | ||||
| 33 | DISP0_VSYNC | 3.3V | IPU1_DI0_PIN03 | IPU1_DI0_PIN03 | IPU2_DI0_PIN03 | AUD6_TXFS | GP4:19 | ||||
| 34 | DISP0_DRDY | 3.3V | IPU1_DI0_PIN15 | IPU1_DI0_PIN15 | IPU2_DI0_PIN15 | AUD6_TXC | GP4:17 | ||||
| 35 | I2C3_SCL | 3.3V | I2C3_SCL | ESAI_TX2_RX3 | KEY_ROW7 | CLKO1 | GP1:05 | I2C3_SCL | ARM_EVENTI | ||
| 36 | I2C3_SDA | 3.3V | I2C3_SDA | ESAI_TX3_RX2 | 1588/IN | ENET_REF_CLK | SD1_LCTL | SPDIF_IN | GP7:11 | I2C3_SDA | JTAG_DE_B |
| 37 | PWM1 | 3.3V | PWM1_OUT | SD1_D3 | SPI5_SS2 | GPT_CMP3 | PWM1_OUT | WDOG2_B | GP1:21 | WDOG2_RST | |
| 38 | +5V | ||||||||||
| 39 | +5V | ||||||||||
| 40 | +5V |
J5 (CSI0 parallel camera interface)
| Pin | Pad / signal | Volts | Default | ALT0 | ALT1 | ALT2 | ALT3 | ALT4 | ALT5 | ALT6 | ALT7 | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | GND | ||||||||||||
| 2 | CSI0_DAT19 | 2.5V | IPU1_CSI0_D19 | IPU1_CSI0_D19 | EIM_D15 | UART5_CTS | GP6:05 | ||||||
| 3 | CSI0_DAT18 | 2.5V | IPU1_CSI0_D18 | IPU1_CSI0_D18 | EIM_D14 | UART5_RTS | GP6:04 | ARM_TR15 | |||||
| 4 | CSI0_DAT17 | 2.5V | IPU1_CSI0_D17 | IPU1_CSI0_D17 | EIM_D13 | UART4_CTS | GP6:03 | ARM_TR14 | |||||
| 5 | CSI0_DAT16 | 2.5V | IPU1_CSI0_D16 | IPU1_CSI0_D16 | EIM_D12 | UART4_RTS | GP6:02 | ARM_TR13 | |||||
| 6 | CSI0_DAT15 | 2.5V | IPU1_CSI0_D15 | IPU1_CSI0_D15 | EIM_D11 | UART5_RXD | GP6:01 | ARM_TR12 | |||||
| 7 | CSI0_DAT14 | 2.5V | IPU1_CSI0_D14 | IPU1_CSI0_D14 | EIM_D10 | UART5_TXD | GP6:00 | ARM_TR11 | |||||
| 8 | CSI0_DAT13 | 2.5V | IPU1_CSI0_D13 | IPU1_CSI0_D13 | EIM_D09 | UART4_RXD | GP5:31 | ARM_TR10 | |||||
| 9 | CSI0_DAT12 | 2.5V | IPU1_CSI0_D12 | IPU1_CSI0_D12 | EIM_D08 | UART4_TXD | GP5:30 | ARM_TR09 | |||||
| 10 | CSI0_DAT11 | 2.5V | N/A | IPU1_CSI0_D11 | AUD3_RXFS | SPI2_SS0 | UART1_RXD | GP5:29 | ARM_TR08 | ||||
| 11 | CSI0_DAT10 | 2.5V | N/A | IPU1_CSI0_D10 | AUD3_RXC | SPI2_MISO | UART1_TXD | GP5:28 | ARM_TR07 | ||||
| 12 | CSI0_DAT9 | 2.5V | N/A | IPU1_CSI0_D09 | EIM_D07 | SPI2_MOSI | KEY_ROW7 | I2C1_SCL | GP5:27 | ARM_TR06 | |||
| 13 | CSI0_DAT8 | 2.5V | N/A | IPU1_CSI0_D08 | EIM_D06 | SPI2_SCLK | KEY_COL7 | I2C1_SDA | GP5:26 | ARM_TR05 | |||
| 14 | I2C2_SCL | 3.3V | I2C2_SCL | SPI1_SS3 | ENET_CRS | HDMI_SCL | KEY_COL3 | I2C2_SCL | GP4:12 | SPDIF_IN | |||
| 15 | I2C2_SDA | 3.3V | I2C2_SDA | 32K_OUT | ASRC_CLK | HDMI_SDA | KEY_ROW3 | I2C2_SDA | GP4:13 | SD1_VSEL | |||
| 16 | GND | ||||||||||||
| 17 | GPIO_3_CLKO2 | 3.3V | CLKO2 | ESAI_RXC | I2C3_SCL | CLK_24M | CLKO2 | GP1:03 | USB_H1OC | MLB_CLK | |||
| 18 | GND | ||||||||||||
| 19 | +2.5V | ||||||||||||
| 20 | +2.5V | ||||||||||||
| 21 | +2.5V | ||||||||||||
| 22 | +2.5V | ||||||||||||
| 23 | GND | ||||||||||||
| 24 | CSI0_DATA_EN | 2.5V | IPU1_CSI0_EN | IPU1_CSI0_EN | EIM_D00 | GP5:20 | ARM_TRCLK | ||||||
| 25 | GND | ||||||||||||
| 26 | CSI0_RST | 3.3V | GP1:08 | ESAI_TX5_RX0 | REF_CLK_32K | EPIT2_OUT | CAN1_RX | UART2_RXD | GP1:08 | SPDIF_CLK | OTG_PWAKE | ||
| 27 | CSI0_VSYNC | 2.5V | IPU1_CSI0_VSYN | IPU1_CSI0_VSYN | EIM_D01 | GP5:21 | ARM_TR00 | ||||||
| 28 | CSI0_HSYNC | 2.5V | IPU1_CSI0_HSYN | IPU1_CSI0_HSYN | CLKO1 | GP5:19 | ARM_TRCTL | ||||||
| 29 | GND | ||||||||||||
| 30 | CSI0_PIXCLK | 2.5V | IPU1_CSI0_CLK | IPU1_CSI0_CLK | GP5:18 | ARM_EVENTO | |||||||
| 31 | GP6 | 3.3V | GP1:06 | ESAI_TX_CLK | I2C3_SDA | GP1:06 | SD2_LCTL | MLB_SIG | |||||
| 32 | GND | ||||||||||||
| 33 | GP1_16 | 3.3V | N/A | SD1_D0 | SPI5_MISO | GPT_CAP1 | GP1:16 |
The post Commonly replaced peripherals appeared first on Boundary Devices.