Vaaman GPIO Description

Vicharak Vaaman board features a 40-pin GPIO (General-Purpose Input/Output) header that provides flexible options for connecting and controlling external devices. Through software settings, you can configure these pins as either input or output, making them adaptable for various applications.

Out of the 40 pins on the header, 27 are dedicated GPIO pins. These GPIO pins can also be repurposed for SPI (Serial Peripheral Interface), UART (Universal Asynchronous Receiver-Transmitter), and I2C (Inter-Integrated Circuit) functions.

This versatility opens up a wide array of possibilities for interfacing with different components and facilitating communication with other devices.

Tip

What? you want more GPIOs?

Fear not, we have a solution for you. Vaaman board has additional 40-FPGA GPIOs available to the user.
These GPIOs are accessible from the FPGA and can be configured to be used inside your project and applications

GPIO Voltage Level

RK3399 SoC has three multiple GPIO voltage levels. Below table shows the voltage level of vaaman GPIOs.

GPIO	Voltage Level	Tolerance
ADC_IN0	1.8V	~1.98V
GPIO3_C0 (Pin 32)	3.3V	~3.46V
Other GPIOs	3.0V	~3.15V

Available GPIOs on Vaaman

Vicharak Vaaman board has total 80 GPIOs available for user. 40 GPIOs are accessible on 40 pin header and 40 GPIOs are accessible from FPGA. Below table shows the GPIOs available on Vaaman board.

Warning

Not all functions can be used at the same time. Only one function can be used or assigned to a GPIO at a time.

SoC GPIOs Header

GPIO number	Function2	Function1	GPIO	Pin#	Pin#	GPIO	Function1	GPIO number
		+3.3V		1	2		+5.0V
		I2C7_SDA		3	4		+5.0V
		I2C7_SCL		5	6		GND
75		SPI2_CLK	GPIO2_B3	7	8	GPIO4_C4	UART2_TXD	148
		GND		9	10	GPIO4_C3	UART2_RXD	147
146		PWM0	GPIO4_C2	11	12	GPIO4_A3	I2S1_SCLK	131
150		PWM1	GPIO4_C6	13	14		GND
149		SPDIF_TX	GPIO4_C5	15	16	GPIO4_D2		154
		+3.3V		17	18	GPIO4_D4		156
		+5V		19	20		GND
		GND		21	22	GPIO4_D5		157
		+5V		23	24		GND
		GND		25	26		ADC_IN0
64		I2C2_SDA	GPIO2_A0	27	28	GPIO2_A1	I2C2_CLK	65
74	I2C6_SCL	SPI2_TXD	GPIO2_B2	29	30		GND
73	I2C6_SDA	SPI2_RXD	GPIO2_B1	31	32	GPIO3_C0	SPDIF_TX	112
76		SPI2_CSn	GPIO2_B4	33	34		GND
133		I2S1_LRCK_TX	GPIO4_A5	35	36	GPIO4_A4	I2S1_LRCK_RX	132
158			GPIO4_D6	37	38	GPIO4_A6	I2S1_SDI	134
		GND		39	40	GPIO4_A7	I2S1_SDO	135

Note

The default function of pins marked in orange are specific to this board. For example, Pins 3 and 5 cannot be used as GPIOs because they are connected to the I2C bus and are already in use.
All pins, except those for power supply, are directly connected to the System-on-Chip (SoC).
Pin 7 is directly connected to the MIPI CSI pin on the board. Instructions to use UART2 as serial console can be found in Serial Console, and to disable it, refer to Vicharak Config Device tree overlays section.
Both UART2 and UART4 support a wide range of baud rates, including 115200bps, 500000bps, 1500000bps, and more.

FGPA Header

Function	GPIO	Pin#	Pin#	GPIO	Function
+5.0V		1	2		+3.3V
+5.0V		3	4		+3.3V
LVDS/GPIO	GPIOT_RX28_P	5	6	GPIOT_RX28_N	LVDS/GPIO
GPIO	GPIO_73	7	8	GPIO_75	GPIO
GPIO	GPIO_173	9	10	GPIO_72	GPIO
GPIO	GPIO_174	11	12	GPIO_178	GPIO
LED	USER_LEDS3	13	14	GPIO_183	GPIO
LED	USER_LEDS2	15	16	USER_LED0	LED
GPIO	GPIO_63	17	18	USER_LED1	LED
GND		19	20		GND
GND		21	22		GND
LVDS/GPIO	RX29_CLK2_N	23	24	RX29_CLK2_P	LVDS/GPIO
CDI	CDI6	25	26		GND
GND		27	28		GND
GPIO	GPIO_168	29	30	GPIO_187	GPIO
GPIO	GPIO_17	31	32	CDI7	CDI
CDI	CDI5	33	34	GPIO_66	GPIO
CDI	CDI4	35	36	GPIO_62	GPIO
GND		37	38		GND
+3.3V		39	40		+3.3V

Note

The default function of pins marked in orange is specific to this board. For example, pin 13, 15, 16 and 16 are used as LEDs and they cannot be used as GPIOs.
The pins layout from 29 to 40 follows the standard PMOD pinout. Check the PMOD page for more information.
LVDS/GPIO pins can either be used as GPIOs or as LVDS pins. To use them as GPIOs, refer to Vicharak FPGA LVDS. section.
CDI can be normally used as GPIOs.

GPIO Numbers translation

GPIO0	Number	GPIO1	Number	GPIO2	Number	GPIO3	Number	GPIO4	Number
A0	0	A0	32	A0	64	A0	96	A0	128
A1	1	A1	33	A1	65	A1	97	A1	129
A2	2	A2	34	A2	66	A2	98	A2	130
A3	3	A3	35	A3	67	A3	99	A3	131
A4	4	A4	36	A4	68	A4	100	A4	132
A5	5	A5	37	A5	69	A5	101	A5	133
A6	6	A6	38	A6	70	A6	102	A6	134
A7	7	A7	39	A7	71	A7	103	A7	135
B0	8	B0	40	B0	72	B0	104	B0	136
B1	9	B1	41	B1	73	B1	105	B1	137
B2	10	B2	42	B2	74	B2	106	B2	138
B3	11	B3	43	B3	75	B3	107	B3	139
B4	12	B4	44	B4	76	B4	108	B4	140
B5	13	B5	45	B5	77	B5	109	B5	141
B6	14	B6	46	B6	78	B6	110	B6	142
B7	15	B7	47	B7	79	B7	111	B7	143
C0	16	C0	48	C0	80	C0	112	C0	144
C1	17	C1	49	C1	81	C1	113	C1	145
C2	18	C2	50	C2	82	C2	114	C2	146
C3	19	C3	51	C3	83	C3	115	C3	147
C4	20	C4	52	C4	84	C4	116	C4	148
C5	21	C5	53	C5	85	C5	117	C5	149
C6	22	C6	54	C6	86	C6	118	C6	150
C7	23	C7	55	C7	87	C7	119	C7	151
D0	24	D0	56	D0	88	D0	120	D0	152
D1	25	D1	57	D1	89	D1	121	D1	153
D2	26	D2	58	D2	90	D2	122	D2	154
D3	27	D3	59	D3	91	D3	123	D3	155
D4	28	D4	60	D4	92	D4	124	D4	156
D5	29	D5	61	D5	93	D5	125	D5	157
D6	30	D6	62	D6	94	D6	126	D6	158
D7	31	D7	63	D7	95	D7	127	D7	159

GPIO0	Number	GPIO1	Number	GPIO2	Number	GPIO3	Number	GPIO4	Number
A0	0	A0	32	A0	64	A0	96	A0	128
A1	1	A1	33	A1	65	A1	97	A1	129
A2	2	A2	34	A2	66	A2	98	A2	130
A3	3	A3	35	A3	67	A3	99	A3	131
A4	4	A4	36	A4	68	A4	100	A4	132
A5	5	A5	37	A5	69	A5	101	A5	133
A6	6	A6	38	A6	70	A6	102	A6	134
A7	7	A7	39	A7	71	A7	103	A7	135
B0	8	B0	40	B0	72	B0	104	B0	136
B1	9	B1	41	B1	73	B1	105	B1	137
B2	10	B2	42	B2	74	B2	106	B2	138
B3	11	B3	43	B3	75	B3	107	B3	139
B4	12	B4	44	B4	76	B4	108	B4	140
B5	13	B5	45	B5	77	B5	109	B5	141
B6	14	B6	46	B6	78	B6	110	B6	142
B7	15	B7	47	B7	79	B7	111	B7	143
C0	16	C0	48	C0	80	C0	112	C0	144
C1	17	C1	49	C1	81	C1	113	C1	145
C2	18	C2	50	C2	82	C2	114	C2	146
C3	19	C3	51	C3	83	C3	115	C3	147
C4	20	C4	52	C4	84	C4	116	C4	148
C5	21	C5	53	C5	85	C5	117	C5	149
C6	22	C6	54	C6	86	C6	118	C6	150
C7	23	C7	55	C7	87	C7	119	C7	151
D0	24	D0	56	D0	88	D0	120	D0	152
D1	25	D1	57	D1	89	D1	121	D1	153
D2	26	D2	58	D2	90	D2	122	D2	154
D3	27	D3	59	D3	91	D3	123	D3	155
D4	28	D4	60	D4	92	D4	124	D4	156
D5	29	D5	61	D5	93	D5	125	D5	157
D6	30	D6	62	D6	94	D6	126	D6	158
D7	31	D7	63	D7	95	D7	127	D7	159

GPIO0	Number	GPIO1	Number	GPIO2	Number	GPIO3	Number	GPIO4	Number
A0	0	A0	32	A0	64	A0	96	A0	128
A1	1	A1	33	A1	65	A1	97	A1	129
A2	2	A2	34	A2	66	A2	98	A2	130
A3	3	A3	35	A3	67	A3	99	A3	131
A4	4	A4	36	A4	68	A4	100	A4	132
A5	5	A5	37	A5	69	A5	101	A5	133
A6	6	A6	38	A6	70	A6	102	A6	134
A7	7	A7	39	A7	71	A7	103	A7	135
B0	8	B0	40	B0	72	B0	104	B0	136
B1	9	B1	41	B1	73	B1	105	B1	137
B2	10	B2	42	B2	74	B2	106	B2	138
B3	11	B3	43	B3	75	B3	107	B3	139
B4	12	B4	44	B4	76	B4	108	B4	140
B5	13	B5	45	B5	77	B5	109	B5	141
B6	14	B6	46	B6	78	B6	110	B6	142
B7	15	B7	47	B7	79	B7	111	B7	143
C0	16	C0	48	C0	80	C0	112	C0	144
C1	17	C1	49	C1	81	C1	113	C1	145
C2	18	C2	50	C2	82	C2	114	C2	146
C3	19	C3	51	C3	83	C3	115	C3	147
C4	20	C4	52	C4	84	C4	116	C4	148
C5	21	C5	53	C5	85	C5	117	C5	149
C6	22	C6	54	C6	86	C6	118	C6	150
C7	23	C7	55	C7	87	C7	119	C7	151
D0	24	D0	56	D0	88	D0	120	D0	152
D1	25	D1	57	D1	89	D1	121	D1	153
D2	26	D2	58	D2	90	D2	122	D2	154
D3	27	D3	59	D3	91	D3	123	D3	155
D4	28	D4	60	D4	92	D4	124	D4	156
D5	29	D5	61	D5	93	D5	125	D5	157
D6	30	D6	62	D6	94	D6	126	D6	158
D7	31	D7	63	D7	95	D7	127	D7	159

GPIO0	Number	GPIO1	Number	GPIO2	Number	GPIO3	Number	GPIO4	Number
A0	0	A0	32	A0	64	A0	96	A0	128
A1	1	A1	33	A1	65	A1	97	A1	129
A2	2	A2	34	A2	66	A2	98	A2	130
A3	3	A3	35	A3	67	A3	99	A3	131
A4	4	A4	36	A4	68	A4	100	A4	132
A5	5	A5	37	A5	69	A5	101	A5	133
A6	6	A6	38	A6	70	A6	102	A6	134
A7	7	A7	39	A7	71	A7	103	A7	135
B0	8	B0	40	B0	72	B0	104	B0	136
B1	9	B1	41	B1	73	B1	105	B1	137
B2	10	B2	42	B2	74	B2	106	B2	138
B3	11	B3	43	B3	75	B3	107	B3	139
B4	12	B4	44	B4	76	B4	108	B4	140
B5	13	B5	45	B5	77	B5	109	B5	141
B6	14	B6	46	B6	78	B6	110	B6	142
B7	15	B7	47	B7	79	B7	111	B7	143
C0	16	C0	48	C0	80	C0	112	C0	144
C1	17	C1	49	C1	81	C1	113	C1	145
C2	18	C2	50	C2	82	C2	114	C2	146
C3	19	C3	51	C3	83	C3	115	C3	147
C4	20	C4	52	C4	84	C4	116	C4	148
C5	21	C5	53	C5	85	C5	117	C5	149
C6	22	C6	54	C6	86	C6	118	C6	150
C7	23	C7	55	C7	87	C7	119	C7	151
D0	24	D0	56	D0	88	D0	120	D0	152
D1	25	D1	57	D1	89	D1	121	D1	153
D2	26	D2	58	D2	90	D2	122	D2	154
D3	27	D3	59	D3	91	D3	123	D3	155
D4	28	D4	60	D4	92	D4	124	D4	156
D5	29	D5	61	D5	93	D5	125	D5	157
D6	30	D6	62	D6	94	D6	126	D6	158
D7	31	D7	63	D7	95	D7	127	D7	159