Portsdown 4 GPIO Connections

From BATC Wiki
Jump to: navigation, search

RPi 4 GPIO pin out

GPIO-Pinout-Diagram-2.png

  • 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 Langstone band D5 -
8 14 15 GPIO 14 TXD0 ADF5355 LE Elcom LE For future Sig Gen
9 - - 0v - - - -
10 15 16 GPIO 15 RXD0 Atten LE - -
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 D4 -
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 (was ADF4351 LE) - DO NOT CONNECT
28 1 31 ID_SC SCL0 (was Band D0) (was Langstone band D7) DO NOT CONNECT
29 5 21 GPIO 5 GPCLK0 spi clock - -
30 - - 0v - - - -
31 6 22 GPIO 6 GPCLK2 spi data - -
32 12 26 GPIO 12 PWM0 new Band D0 new Langstone band D7 -
33 13 23 GPIO 13 PWM1 new ADF4351 LE - -
34 - - 0v - - - -
35 19 24 GPIO 19 SPI6_MESO Band D1 Langstone band D6 -
36 16 27 GPIO 16 FL0 - - -
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.

Note that no connections should be made to GPIO Pins 27 and 28, otherwise the RPi might get stuck on the Rainbow Screen at boot. Previous connections to these pins are being moved to other pins TBD.