Ryde GPIO Connections

RPi 4 GPIO pin out

• Note the Rpi4 (only) can be powered with 5v directly on to GPIO 2 and 4.

Proposed GPIO Connections for the Ryde Receiver

Here is the proposed 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	Valid RX Signal	-	Active High
8	14	15	GPIO 14	TXD0	-	-	-
9	-	-	0v	-	-	-	-
10	15	16	GPIO 15	RXD0	-	-	-
11	17	0	GPIO 17	FL1	IR Sensor Input	Active low
12	18	1	GPIO 18	PCM_CLK	Button - Up	-	Active low
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	-	-	-
20	-	-	0v	-	-	-	-
21	9	13	GPIO 9	SPI0_MISO	-	-	-
22	25	6	GPIO 25	SD0_DAT1	Button - Back	-	Active low
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	Reserved	-	-
28	1	31	ID_SC	SCL0	Reserved	-	-
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	-	-
33	13	23	GPIO 13	PWM1	Band NSB	-	-
34	-	-	0v	-	-	-	-
35	19	24	GPIO 19	PCM_FS	Band MSB	-	-
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	PCM_DIN -	-	Future Use?
39	-	-	0v	-	-	-	-
40	21	29	GPIO 21	PCM_DOUT	-	-	Future Use?

Note that the GPIO pin names are markedly different from the RPi 3B. Each pin on the RPi4 GPIO can be referred to in 4 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.