Difference between revisions of "Repeater GPIO Connections"

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(Created page with "==RPi 4 GPIO pin out== 600px * Note the RPi4 (only) can be powered with 5.2 v directly on Pins 2 and 4. Ground is Pins 6, 9, 14, 20, 25,...")
 
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| 7 || 4 || 7 || GPIO 4 || GPCLK0 || - || - || Future Clock module?
 
| 7 || 4 || 7 || GPIO 4 || GPCLK0 || - || - || Future Clock module?
 
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| 8 || 14 || 15 || GPIO 14 || TXD0 || Button - Up || - || Active low
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| 8 || 14 || 15 || GPIO 14 || TXD0 || - || - || Future RS-232?
 
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| 9 || - || - || 0v || - || - || - || Future Clock module?
 
| 9 || - || - || 0v || - || - || - || Future Clock module?
 
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| 10 || 15 || 16 || GPIO 15 || RXD0 || Band MSB D2 || - || -
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| 10 || 15 || 16 || GPIO 15 || RXD0 || - || - || Future RS-232?
 
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| 11 || 17 || 0 || GPIO 17 || FL1 || IR Sensor Input  || Active low ||  
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| 11 || 17 || 0 || GPIO 17 || FL1 || - || - || IR Sensor Input?
 
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| 12 || 18 || 1 || GPIO 18 || SPI6_CE0_N || - || - || Future 2nd TS
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| 12 || 18 || 1 || GPIO 18 || - || IR Sender Output || - || To control HDMI Switch
 
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| 13 || 27 || 2 || GPIO 27 || SD0_DAT3 || Button - Down || - || Active low
 
| 13 || 27 || 2 || GPIO 27 || SD0_DAT3 || Button - Down || - || Active low

Revision as of 10:20, 12 January 2022

RPi 4 GPIO pin out

GPIO-Pinout-Diagram-2.png

  • Note the RPi4 (only) can be powered with 5.2 v directly on Pins 2 and 4. Ground is Pins 6, 9, 14, 20, 25, 30, 34 and 39.

GPIO Connections for the ATV Repeater

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 - - - Future Clock module?
2 - - 5v - - - -
3 2 8 GPIO 2 SDA1 - - Future Clock module?
4 - - 5v - - - -
5 3 9 GPIO 3 SCL1 - - Future Clock module?
6 - - 0v - - - -
7 4 7 GPIO 4 GPCLK0 - - Future Clock module?
8 14 15 GPIO 14 TXD0 - - Future RS-232?
9 - - 0v - - - Future Clock module?
10 15 16 GPIO 15 RXD0 - - Future RS-232?
11 17 0 GPIO 17 FL1 - - IR Sensor Input?
12 18 1 GPIO 18 - IR Sender Output - To control HDMI Switch
13 27 2 GPIO 27 SD0_DAT3 Button - Down - Active low
14 - - 0v - - - -
15 22 3 GPIO 22 SD0_CLK Button - Left - Active low
16 23 4 GPIO 23 SD0_CMD Button - Right - Active low
17 - - 3.3v - - - -
18 24 5 GPIO 24 SD0_DAT0 Button - Select - Active low
19 10 12 GPIO 10 SPI0_MOSI - - Future Pri TS
20 - - 0v - - - -
21 9 13 GPIO 9 SPI0_MISO - - Future Pri TS
22 25 6 GPIO 25 SD0_DAT1 Button - Back - Active low
23 11 14 GPIO 11 SPI0_SCLK - - Future Pri TS
24 8 10 GPIO 8 SPI0_CE0_N - - Future Pri TS
25 - - 0v - - - -
26 7 11 GPIO 7 SPI0_CE1_N Hardware Shutdown - Active low if enabled
27 0 30 ID_SD SDA0 Reserved - Not Available
28 1 31 ID_SC SCL0 Reserved - Not Available
29 5 21 GPIO 5 GPCLK0 Button - Menu - Active low
30 - - 0v - - - -
31 6 22 GPIO 6 GPCLK2 Button - Mute - Active Low
32 12 26 GPIO 12 PWM0 Band LSB D0 - -
33 13 23 GPIO 13 PWM1 Band NSB D1 - -
34 - - 0v - - - -
35 19 24 GPIO 19 SPI6_MESO - - Future 2nd TS
36 16 27 GPIO 16 FL0 Button - Power - Active low
37 26 25 GPIO 26 SD0_DAT2 Button - OSD Info - Active low
38 20 28 GPIO 20 SPI6_MOSI - - Future 2nd TS
39 - - 0v - - - -
40 21 29 GPIO 21 SPI6_SCLK - - Future 2nd TS

The clock module that may be used (not tested yet) on pins 1, 3, 5, 7 and 9 is this https://thepihut.com/blogs/raspberry-pi-tutorials/17209332-adding-a-real-time-clock-to-your-raspberry-pi. This would allow the repeater to keep track of time without an internet connection and reset correctly after power outages.

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.