MCH2022 badge pinouts

Connectors

SAO (Shitty AddOn)

Addon connector following the SHITTY ADD-ON V1.69BIS standard.

Pin	Description	Direction	Connection
1	VCC	Power output	3.3v supply voltage output
2	GND	Power output	Ground reference
3	SDA	Data IO	I2C bus data
4	SCL	Data output	I2C bus clock
5	GPIO1	Data IO	User configurable IO, connected to RP2040 GPIO18
6	GPIO2	Data IO	User configurable IO, connected to RP2040 GPIO19

PMOD (peripheral module interface)

PMOD

The PMOD connector is wired up to the iCE40 FPGA. Note that while the connector is physically located on the backside of the badge, it has been wired up such that the PMOD’s top side must be pointed in the same direction as the badge’s top.

PMOD pin	ICE40 pin	Note
1	47	`IOB_2a` (paired with PMOD pin 7 `IOB_3b_G6`)
2	48	`IOB_4a` (paired with PMOD pin 8 `IOB_5b`)
3	4	`IOB_8a` (paired with PMOD pin 9 `IOB_9b`)
4	2	`IOB_6a`
7	44	`IOB_3b_G6` (paired with PMOD pin 1 `IOB_2a`)
8	45	`IOB_5b` (paired with PMOD pin 2 `IOB_4a`)
9	3	`IOB_9b` (paired with PMOD pin 3 `IOB_8a`)
10	46	`IOB_0a`

Chips

ESP32

ESP32 GPIO	Direction	Function	Note
0	Both	I2S master clock output / UART download select input	Drives I2S DAC / driven by RP2040 through resistor
1	Output	UART TX	Connected to RP2040
2	Both	SD card data 0	SD card slot
3	Input	UART RX	Connected to RP2040
4	Output	I2S bit clock
5	Output	LED data	Connected to the SK6805 LEDs in the kite
12	Output	I2S LR channel select
13	Output	I2S data
14	Output	SD clock	SD card slot
15	Output	SD command	SD card slot
18	Output	SPI clock	Connected to LCD and FPGA
19	Output	SD card and kite LED power control	Set high to enable power to LEDs and SD card
21	Output	I2C clock	Connected to RP2040, BNO055, BME680, Qwiic connector and SAO addon connector
22	Both	I2C data	Connected to RP2040, BNO055, BME680, Qwiic connector and SAO addon connector
23	Output	SPI MOSI	Data from ESP32 to LCD / FPGA
25	Both	LCD reset	Set to output low to reset LCD, leave floating normally
26	Output	LCD mode	Low: LCD in SPI mode, high: LCD in parallel mode
27	Output	SPI chip select for ICE40	Low: select ICE40, high: deselect ICE40
32	Both	SPI chip select for LCD	Low: select LCD, high: deselect LCD. Note: output in LCD SPI mode, input in LCD parallel mode
33	Both	LCD DC (data or command) selection	Note: output in LCD SPI mode, input in LCD parallel mode
34	Input	Interrupt from RP2040
35	Input	SPI MISO	Connected to ICE40
36 (SENSOR_VP)	Input	Interrupt from position sensor (BNO055)
39 (SENSOR_VN)	Input	Interrupt from ICE40 FPGA

RP2040

RP2040 GPIO	Direction	Pull	Function	Description
0	Output		UART0 TX	ESP32 UART
1	Input		UART0 RX	ESP32 UART
2	Both		I2C1 SDA	I2C bus data (RP2040 is in slave mode)
3	Input		I2C1 SCL	I2C bus clock
4	Input	Up	GPIO	Button: MENU
5	Input	Up	GPIO	Button: HOME
6	Input	Up	GPIO	Button: ACCEPT
7	Input	Up	GPIO	Button: Joystick A
8	Input	Up	GPIO	Button: Joystick B
9	Input	Up	GPIO	Button: Joystick C
10	Input	Up	GPIO	Button: Joystick D
11	Input	Up	GPIO	Button: Joystick E
12	Both		GPIO	ESP32 bootloader mode¹
13	Output		GPIO	ESP32 enable
14	Both		GPIO	ESP32 interrupt¹
15	Output		PWM	LCD backlight brightness
16	Both		GPIO	Available next to prototyping area
17	Both		GPIO	Available next to prototyping area
18	Both		GPIO	SAO GPIO1
19	Both		GPIO	SAO GPIO2
20	Input		GPIO	FPGA done
21	Output		GPIO	FPGA reset
22	Input	Up	GPIO	Button: START
23	Input		GPIO	LiPo charger state
24	Output		UART1 TX	FPGA UART
25	Input		UART1 RX	FPGA UART
26	Input	Up	GPIO	Button: BACK
27	Output		GPIO	Infrared LED
28	Input		ADC	Voltage measurement: USB input
29	Input		ADC	Voltage measurement: Battery

¹: Set to input normally and force low to activate

ICE40 FPGA

ICE40 pin	ICE40 GPIO	Direction	Description	Notes
2	`IOB_6a`	Both	PMOD pin 4
3	`IOB_8a`	Both	PMOD pin 3
4	`IOB_9b`	Both	PMOD pin 9
6	`IOB_13b`	Input	UART RX
9	`IOB_16a`	Output	UART TX
10	`IOB_18a`	Output	Interrupt	Active-low
11	`IOB_20a`	Output	LCD register select
12	`IOB_22b`	Both	RAM SPI D2
13	`IOB_24a`	Both	RAM SPI D1
14	`IOB_32a_SPI_SO`	Output	SPI MISO
15	`IOB_34b_SPI_SCK`	Input	SPI SCK
16	`IOB_35b_SPI_SS`	Input	SPI SS
17	`IOB_33b_SPI_SI`	Input	SPI MOSI
18	`IOB_31b`	Output	RAM SPI CS
19	`IOB_29b`	Output	RAM SPI SCK
20	`IOB_25b_G3`	Both	RAM SPI D3
21	`IOB_23b`	Both	RAM SPI D0
23	`IOT_37a`	Output	LCD write
25	`IOT_36b`	Input	LCD frame sync
26	`IOT_39a`	Output	LCD data 0
27	`IOT_38a`	Output	LCD data 1
28	`IOT_41a`	Output	LCD CS
31	`IOT_42b`	Output	LCD data 2
32	`IOT_43a`	Output	LCD data 3
34	`IOT_44b`	Output	LCD data 4
35	`IOT_46b_G0`	Input	12MHz clock
36	`IOT_48b`	Output	LCD reset	Active-low, drive open-drain
37	`IOT_45a_G1`	Output	LCD data 5
38	`IOT_50b`	Output	LCD data 6
39	`RGB0`	Output	LED
40	`RGB1`	Output	LED
41	`RGB2`	Output	LED
42	`IOT_51a`	Output	LCD data 7
43	`IOT_49a`	Input	LCD mode	Should be driven by ESP and monitored by FPGA
44	`IOB_3b_G6`	Both	PMOD pin 7
45	`IOB_5b`	Both	PMOD pin 8
46	`IOB_0a`	Both	PMOD pin 10
47	`IOB_2a`	Both	PMOD pin 1
48	`IOB_4a`	Both	PMOD pin 2

Last modified December 13, 2024: Remove WHY2025 badge (8f6c078)