Portsdown 4 GPIO Connections
Jump to navigation
Jump to search
The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.
RPi 4 GPIO pin out
- Note the RPi4 (only) can be powered with 5v directly on to GPIO 2 and 4.
GPIO Connections for the Portsdown 4
Here is the initial list of GPIO connections.
Pin No | BCM No | Wiring Pi | RPi Pri | RPi Alt0 | Primary Use | Secondary Use | Notes |
---|---|---|---|---|---|---|---|
1 | - | - | 3.3v | - | - | - | - |
2 | - | - | 5v | - | - | - | - |
3 | 2 | 8 | GPIO 2 | SDA1 | - | - | - |
4 | - | - | 5v | - | - | - | - |
5 | 3 | 9 | GPIO 3 | SCL1 | - | - | - |
6 | - | - | 0v | - | - | - | - |
7 | 4 | 7 | GPIO 4 | GPCLK0 | Band D2 | - | For 8-way switch |
8 | 14 | 15 | GPIO 14 | TXD0 | ADF5355 LE | Elcom LE | For future Sig Gen |
9 | - | - | 0v | - | - | - | - |
10 | 15 | 16 | GPIO 15 | RXD0 | - | Active low | |
11 | 17 | 0 | GPIO 17 | FL1 | Langstone PTT | Active low | |
12 | 18 | 1 | GPIO 18 | SPI6_CE0_N | Transmit Demand | Langstone CW Key | - |
13 | 27 | 2 | GPIO 27 | SD0_DAT3 | "Active" LED | - | Active high |
14 | - | - | 0v | - | - | - | - |
15 | 22 | 3 | GPIO 22 | SD0_CLK | Shutdown Button | - | Active high |
16 | 23 | 4 | GPIO 23 | SD0_CMD | - | Langstone band D3 | - |
17 | - | - | 3.3v | - | - | - | - |
18 | 24 | 5 | GPIO 24 | SD0_DAT0 | - | Langstone band D2 | - |
19 | 10 | 12 | GPIO 10 | SPI0_MOSI | - | Langstone band D1 | - |
20 | - | - | 0v | - | - | - | - |
21 | 9 | 13 | GPIO 9 | SPI0_MISO | - | Langstone band D0 | - |
22 | 25 | 6 | GPIO 25 | SD0_DAT1 | - | Langstone band D2 | - |
23 | 11 | 14 | GPIO 11 | SPI0_SCLK | - | - | - |
24 | 8 | 10 | GPIO 8 | SPI0_CE0_N | - | - | - |
25 | - | - | 0v | - | - | - | - |
26 | 7 | 11 | GPIO 7 | SPI0_CE1_N | - | - | - |
27 | 0 | 30 | ID_SD | SDA0 | ADF4351 LE | - | (Reserved) |
28 | 1 | 31 | ID_SC | SCL0 | - | Langstone band D7 | - |
29 | 5 | 21 | GPIO 5 | GPCLK0 | spi clock | - | - |
30 | - | - | 0v | - | - | - | - |
31 | 6 | 22 | GPIO 6 | GPCLK2 | spi data | - | - |
32 | 12 | 26 | GPIO 12 | PWM0 | Band D0 | - | - |
33 | 13 | 23 | GPIO 13 | PWM1 | - | - | - |
34 | - | - | 0v | - | - | - | - |
35 | 19 | 24 | GPIO 19 | SPI6_MESO | - | Langstone band D6 | - |
36 | 16 | 27 | GPIO 16 | FL0 | Band D1 | - | - |
37 | 26 | 25 | GPIO 26 | SD0_DAT2 | - | - | - |
38 | 20 | 28 | GPIO 20 | SPI6_MOSI | - | - | - |
39 | - | - | 0v | - | - | - | - |
40 | 21 | 29 | GPIO 21 | SPI6_SCLK | TX LED/PTT Drive out | - | - |
Note that the GPIO pin names are markedly different from the RPi 3B. Each pin on the RPi4 GPIO can be referred to in many ways: its physical pin number, the Broadcom I/O number, the Wiring Pi number or the primary or alternate names. Source for GPIO designations was the Raspberry Pi 4 Model B datasheet.