VGA CMOS Camera Module Lens CMOS 640X480 SCCB W/ I2C

Description :

OV7670 FIFO VGA Camera Module 30W Pixel Image Sensor Board STM32 Microcontroller Driver for Arduino DIY Kit

The FIFO camera has more than a 3M cache, which can temporarily store the collected data in this cache. When using, it can read the image data in the cache, so it can reduce the MCU speed when the microcontroller captures image data. The request. (The routine stores image data in RGB565 mode)

1. Product Overview

OV7670 with FIFO module is a kind of module with buffer storage space for slow MCU to achieve image acquisition control. This module adds a FIFO (first-in, first-out) memory chip, which also contains a 30-pixel CMOS image sensor, a 3.6-mm focal length lens mount, and a lens mount. Various onboard power supplies are required for the CMOS chip. The data file of the chip), the board also leads out the control pin and the data pin, which is convenient for operation and use.

3V3: Input power supply voltage (3.3,5V is recommended but not recommended)

GDN: Grounding point

SIO_C: Control clock of the SCCB interface (Note: Some low-level microcontrollers require pull-up control, similar to the I2C interface)

SIO_D: serial data input (out) side of SCCB interface (Note: some low-level microcontrollers require pull-up control, similar to I2C interface)

VSYNC: Frame Sync Signal (Output Signal)

HREF: Line synchronization signal (output signal, generally not applicable, special circumstances)

D0-D7: Data port (output signal)

RESTE: reset the port (normal use pull high)

PWDN: power consumption selection mode (normal use pull low)

STROBE: camera flash control port (normal use may not need)

FIFO_RCK: FIFO Memory Read Clock Controller

FIFO_WR_CTR: FIFO Write Control (1 to enable CMOS write to FIFO, 0 is disabled)

FIFO_OE: FIFO Shutdown Control

FIFO_WRST: FIFO write pointer reset

FIFO_RRST: FIFO read pointer reset

3. Control instructions

Because FIFO is used as data buffering, data collection is simple and convenient. Users only need to care about how to read, and do not need to care about how specific data is collected. This can reduce or even eliminate CMOS control and timing relationships. It is able to achieve image acquisition.

The control sequence is as follows: