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Arducam Shield Mini 5MP Plus

1. Introduction

ArduCAM Shield Mini 5MP Plus is latest version compared to its predecessor ArduCAM-M-5MP. It is a general purpose high definition 5MP SPI camera, which reduce the complexity of the camera control interface. It integrates 5MP CMOS image sensor OV5642, and provides miniature size, as well as the easy to use hardware interface and open source code library. This camera can be used in any platforms like Arduino, Raspberry Pi, Maple, Chipkit, Beaglebone black, as long as they have SPI and I2C interface and can be well mated with standard Arduino boards. ArduCAM mini not only offers the capability to add a camera interface which doesn’t have in some low cost microcontrollers, but also provides the capability to add multiple cameras to a single microcontroller.

2. Feature

  • 5MP image sensor OV5642
  • M12 mount or CS mount lens holder with changeable lens options
  • IR sensitive with proper lens combination
  • I2C interface for the sensor configuration
  • SPI interface for camera commands and data stream
  • All IO ports are 5V/3.3V tolerant
  • Support JPEG compression mode, single and multiple shoot mode, one time capture multiple read operation, burst read operation, low power mode and etc.
  • Well mated with standard Arduino boards
  • Provide open source code library for Arduino, STM32, Chipkit, Raspberry Pi, BeagleBone Black
  • Small form of factor

3. Key Specifications

Power Consumption
Normal :5V/300mA
Low power mode: 5V/20mA
Active pixel size: 2592×1944
SPI speed: 8MHz Lens: 1/4 inch
Frame buffer: 8MByte Resolution support:
5MP, 1080P, 720P, VGA, QVGA
Format support: RAW, YUV, RGB, JPEG Size: 34 x 24 mm
Weight: 30g Temperature: -10℃~+55℃

4. Pin Definition

Pin No. PIN NAME TYPE DESCRIPTION
1 CS Input SPI slave chip select input
2 MOSI Input SPI master output slave input
3 MISO Output SPI master input slave output
4 SCLK Input SPI serial clock
5 GND Ground Power ground
6 VCC POWER 3.3V ~ 5V Power supply
7 SDA Bi-directional Two-Wire Serial Interface Data I/O
8 SCL Input Two-Wire Serial Interface Clock

5. Functions

5.1 Single Capture Mode

Single capture mode is the default capture mode of the camera. After issuing a capture command via SPI port, the ArduCAM will wait for a new frame and buffer the one entire image data to the frame buffer, and then assert the completion flag bit in the register. User only needs to poll the flag bit from the register to check out if the capture is done.

5.2 Multiple Capture Mode

Multiple capture mode is advanced capture mode. By setting the number of frames in the capture register, the ArduCAM will capture consequent frames after issuing capture command.

5.3 Short Movie Recording Mode

Short movie recording mode is advanced capture mode. By setting the maximum number of frames in the corresponding register, the ArduCAM will capture continuous frames until the 8MByte frame buffer is full.

5.4 JPEG Compression

The JPEG compression function is implemented in the image sensor. With proper register settings to the sensor, user can get different resolution with JPEG image stream output.

5.5 Normal Read and Burst Read Operation

Normal read operation reads each image data by sending a read command in one SPI read operation cycle. While burst read operation only need to send a read command then read multiple image data in one SPI read operation cycle. It is recommended to use burst read operation to get better throughput performance.

5.6 Rewind Read Operation

Sometimes user wants to read the same frame of image data multiple times for processing, the rewind read operation is designed for this purpose. By resetting the read pointer to the beginning of the image data, user can read the same image data from the start point again.

5.7 Low Power Mode

Some battery power device need save power when in the idle status, the ArduCAM offers the low power mode to reduce power consumption, by shutdown the sensor and memory circuits.

5.8 Image Sensor Control

Image sensor control function is implemented in the image sensor. By setting proper set of register settings, user can control the exposure, white balance, brightness, contrast, color saturation and etc.

6. Hardware Wiring

6.1 Single Camera Wiring

The typical connection between ArduCAM shield and Arduino or etc platform is shown in the Figure 1. More typically the Figure 2 shows the wiring for Arduino UNO R3 board.

Figure 1 Typical Wiring

Figure 2 Wiring for Arduino UNO R3

6.2 Multi Cameras Wiring

The multi-cameras connection between ArduCAM shield and Arduino or etc platform is shown in the Figure 3. More typically the Figure 4 shows the multi-cameras wiring for Arduino UNO R3 board.

Figure 3 Multi-Cameras Wiring

Figure 4 Mult-Cameras Wiring on Arduino UNO

7. I2C Interface

The I2C interface is directly connected to the image sensor OV5642. It should be well initialized before normal operation, or else there is no output from the sensor. The OV5642 I2C slave address is 0x78 for write and 0x79 for read. User can use I2C master to read and write all the registers in the OV5642 sensor. For more information about the OV5642 register, please refer the OV5642 datasheet. The Figure 4 shows writing value 0x80 to the OV5642 register 0x3008. The Figure 5 shows reading value 0x56 from the OV5642 register 0x300A.

Figure 5 I2C Write Bus Timing

Figure 6 I2C Read Bus Timing

8. SPI Slave Interface

The ArduCAM SPI slave interface is fixed SPI mode 0 with POL = 0 and PHA = 0. The maximum speed of SCLK is designed for 8MHz, care should taken do not over clock the maximum 8MHz. The SPI protocol is designed with a command phase with variable data phase. The chip select signal should always keep asserted during the SPI read or write bus cycle. For SPI detail timing, please continue to read Arduchip chapter.

9. Lens Options

The ArduCAM Shield Mini 5MP Plus camera shield is shipped with default LS-27227 (S mount) . There are more lens options which can be found from our lens product page.

There are two lens kits selected for Arducam cameras, please check the LK001 and LK002 for detail.

10. Mechanical Dimension

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