Hardware Connection

Main Board Interfaces Overview

Top side Interfaces:

• Type-C for UART and Power Supply
• MicroSD Slot
• Reset Button
• Wireless Module Connector
• Sanp Button
• Uart Port for Debug
• USB Camera Connector
• LED Board Connector
• Camera Module Interface

Bottom side Interfaces:

• Power Input Connector
• Alarm Input Connector
• PIR Input Connector
• Expansioin GPIOs, include UART、I2C、SPI、Power Output
• Boot Button

Demo Kit quick start guide

• After unpacking, inspect the Main Board and accessories to ensure they are intact.
• Connect the Camera Module (OV5640 Module or USB Module) to the main board.
• Attach the communication module (Cat-1 or WiFi-Halow) to the main board (optional).
• Connect the debug UART port via the Type-C or 4Pin Wafer connector.
• Supply power through the Type-C port or the power connector.
• After completing the above steps, you may begin the related debugging procedures.

For program and debug, please ref：AI Camera System Flashing

Interfaces description

Peripherals power Ctrl

Before using the camera, ISP, battery level detection, flash, or light sensor, the CAM_PWR pin must be set high to enable their operation. Similarly, the TF_PWR pin must be set high before using the TF card.

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	Alternate Function
16	CAM_PWR	GPIO3	O	PD 10K
35	TF_PWR	GPIO42	O	PD 100K

PIR GPIOs Defined

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	Alternate Function
1	VDD	Power supply	S
2	GND	GND	S
3	Serial_IN	Config Port	I/O/T		GPIO41
4	INT/Dout	AlarmIN	I/O/T		GPIO2

16Pin GPIOs Expansion

The 16 pins expansion header provide communication interface like uart, I2C, SPI and GPIOs. Developer can use these interfaces to expand sensor modules like PIR sensor, OLED module as their needed.

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	Alternate Function
1	TXD0	Uart0 TX	I/O/T	PU 10K	GPIO43
2	GND	GND	S
3	RXD0	Uart0 RX	I/O/T	PU 10K	GPIO44
4	GND	GND	S
5	GPIO	GPIO41	I/O/T
6	5V0	5V0 Input	S
7	SPI_MISO	SPI_MISO	I/O/T		GPIO40
8	3V3	3V3 Output	S
9	SPI_CLK	SPI_CLK	I/O/T		GPIO39
10	Alarm_IN	Alarm Input	I		GPIO2,ADC1_CH1
11	SPI_MOSI	SPI_MOSI	I/O/T		GPIO38
12	SPI_CS	SPI_CS	I/O/T		GPIO45
13	GPIO	GPIO19	I/O/T		USB_D-,ADC2_CH8
14	GPIO	GPIO48	I/O/T
15	GPIO	GPIO20	I/O/T		USB_D+,ADC2_CH9
16	GPIO	GPIO46	I/O/T

Camera Sensor IOs

Camera Module OV5640 support 8-bit paralle input interface. The IOs of main board config as below

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	ESP32-S3 PINs
1	Null
2	GND	GND	S
3	I2C_SDA	I2C_Data	I/O	PU 4K7	GPIO4
4	AVDD	2.8V	S
5	I2C_SCL	I2C_Clock	O	PU 4K7	GPIO5
6	CAM_RST	Reset#low			RC circuit
7	CSI_VSYNC	V-Sync	I		GPIO6
8	CSI_PWDN			PD 1K
9	CSI_HSYNC	H-Sync	I		GPIO7
10	DVDD	1V2	S
11	DOVDD	2V8	S
12	CSI_D7	Data_Bit7	I		GPIO16
13	CSI_MCLK	Clock_output	O		GPIO15
14	CSI_D6	Data_Bit6	I		GPIO17
15	GND	GND	S
16	CSI_D5	Data_Bit5	I		GPIO18
17	CSI_PCLK	Pixel Clock	I		GPIO13
18	CSI_D4	Data_Bit4	I		GPIO12
19	CSI_D0	Data_Bit0	I		GPIO11
20	CSI_D3	Data_Bit3	I		GPIO10
21	CSI_D1	Data_Bit1	I		GPIO9
22	CSI_D2	Data_Bit2	I		GPIO8
23	Null
24	Null

Note: 1. Set the CAM_PWR pin high before use.

Flash and Light Sensor IOs

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	ESP32-S3 PINs
24	FLASH_LED	LEDC_PWM	O	PD 100K	GPIO47
39	LIGHT_RESISTOR	ADC	A		GPIO1

Note: 1. Set the CAM_PWR pin high before use; 2. A light intensity of 0% to 100% corresponds to an output voltage of 0 to 2.5V.

TF Card IOs

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	ESP32-S3 PINs
31	CMD	SDIO_CMD	O	PU 10K	GPIO38
32	CLK	SDIO_CLK	O	PU 10K	GPIO39
33	DAT0	SDIO_DA0	I	PU 10K	GPIO40
34	CD	SDIO_IRQ	I	PU 1M	GPIO41

Note: 1. Set the TF_PWR pin high before use; 2. Please use MMC 1-bit mode protocol driver; 3. Cannot be used simultaneously with WiFi-Halow and 4G Cat1 modules due to pin conflicts.

Other IOs

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	ESP32-S3 PINs
23	CFG_KEY	IRQ_IN	I	PU 10K	GPIO21
22	BAT_DET	ADC	A		GPIO14

Note: 1. Before starting battery level detection, the CAM_PWR pin must be set high; 2. The battery level from 0% to 100% corresponds to a voltage range of 1.8 to 3V.

Communication Module Pins Header defined

Communication Module is mounted on J11 & J15 Pins Header. The J11 16 Pins Header provide related signals. The J15 12 Pins Header only for phsical support. Please note that for IOs sources lack, the IO configuration conflit with some IOs

16 Pins Expansion Header

Detailed information please reference the comparison table.

PIN#	Pin Name	Functions	Pin Type	Pull Up/Down	ESP32-S3 PINs
1	VCC_IN	Power Output	S
2	3V3	3V3 Output	S
3	VCC_IN	Power Output	S
4	3V3	3V3 Output	S
5	WIFI_PWR_H	Power Enable	I/O/T		GPIO48
6	GND		GND
7	SPI_MOSI	SPI_MOSI	I/O/T		GPIO38
8	SPI_MISO	SPI_MISO	I/O/T		GPIO40
9	SPI_CS	SPI_CS	I/O/T		GPIO45
10	SPI_CS	SPI_CS	I/O/T		GPIO45
11	WIFI_BUSY	Status	I/O/T		GPIO20,USB_D+,ADC2_CH9
12	IRQ	Interrupt	I/O/T		GPIO41
13	GND		GND
14	WIFI_WAKE	Wake_Up	I/O/T		GPIO19,USB_D-,ADC2_CH8
15	SPI_CLK	SPI_CLK	I/O/T		GPIO39
16	WIFI_RST	Reset#low	I/O/T		GPIO46

IO Conflict table

If you use the Cat-1 or WiFi-Halow Module,the IOs occupancy by the module should not be used or connected anything on 16 Pins Expansion header.

PIN#	Pin Name	Functions	Cat-1 Module	WiFi-Halow Module
1	TXD0	Uart0 TX
2	GND	GND
3	RXD0	Uart0 RX
4	GND	GND
5	GPIO	GPIO41		IRQ
6	3V3	3V3 Output
7	SPI_MISO	SPI_MISO	UART_TXD	SPI_MISO
8	3V3	3V3 Output
9	SPI_CLK	SPI_CLK	UART_RXD	SPI_CLK
10	Alarm_IN	Alarm Input
11	SPI_MOSI	SPI_MOSI		SPI_MOSI
12	SPI_CS	SPI_CS		SPI_CS
13	GPIO	GPIO19		WIFI_WAKE
14	GPIO	GPIO48	CAT1_PWR_H	WIFI_PWR_H
15	GPIO	GPIO20		WIFI_RST
16	GPIO	GPIO46		WIFI_BUSY