OV5640: 500万像素OmniBSI色彩CMOS传感器，支持镜像与翻转模式

OV5640

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color CMOS QSXGA (5 megapixel) image sensor with OmniBSI™ technology

OV5640

proprietary to OmniVision Technologies PRODUCT SPECIFICATION version 2.03

D1 PWDN input power down (active high with internal pull-down resistor)

D2 DVDD power power for digital circuit

D10 NC – no connect

D11 AGND ground ground for analog circuit

E1 STROBE I/O strobe output

E2 RESETB input reset (active low with internal pull-up resistor)

E10 NC – no connect

E11 NC – no connect

F1 GPIO0 I/O GPIO port 0

F2 FREX I/O frame exposure / mechanical shutter

F10 NC – no connect

F11 SGND ground ground for sensor circuit

G1 GPIO1 I/O GPIO port 1

G2 DOGND ground ground for I/O circuit

G10 SIOC input SCCB input clock

G11 SIOD I/O SCCB data

H1 VSYNC I/O DVP VSYNC output

H2 HREF I/O DVP HREF output

H10 D3 I/O DVP data output port 3

H11 XVCLK input system input clock

I1 PCLK I/O DVP PCLK output

I2 DGND ground ground for digital circuit

I8 D6/MCN I/O DVP data output port 6/ MIPI TX clock lane negative output

I9 D7/MCP I/O DVP data output port 7/ MIPI TX clock lane positive output

I10 PVDD power power for PLL circuit

I11 DVDD power power for digital circuit

J1 DVDD power power for digital circuit

J2 DOVDD power power for I/O circuit

J3 DOVDD power power for I/O circuit

J4 DOGND ground ground for I/O circuit

table 1-1 signal descriptions (sheet 2 of 3)

number

signal name

type

description

05.26.2011 PRODUCT SPECIFICATION proprietary to OmniVision Technologies

2-1

2 system level description

2.1 overview

The OV5640 (color) image sensor is a low voltage, high-performance, 1/4-inch 5 megapixel CMOS image sensor that

provides the full functionality of a single chip 5 megapixel (2592x1944) camera using OmniBSI™ technology in a small

footprint package. It provides full-frame, sub-sampled, windowed or arbitrarily scaled 8-bit/10-bit images in various

formats via the control of the Serial Camera Control Bus (SCCB) interface.

The OV5640 has an image array capable of operating at up to 15 frames per second (fps) in 5 megapixel resolution with

complete user control over image quality, formatting and output data transfer. All required image processing functions,

including exposure control, gamma, white balance, color saturation, hue control, defective pixel canceling, noise

canceling, etc., are programmable through the SCCB interface or embedded microcontroller. The OV5640 also includes

a compression engine for increased processing power. In addition, OmniVision image sensors use proprietary sensor

technology to improve image quality by reducing or eliminating common lighting/electrical sources of image

contamination, such as fixed pattern noise, smearing, etc., to produce a clean, fully stable, color image.

The OV5640 has an embedded microcontroller, which can be combined with an internal autofocus engine and

programmable general purpose I/O modules (GPIO) for external autofocus control. It also provides an anti-shake

function with an internal anti-shake engine. For identification and storage purposes, the OV5640 also includes a one-time

programmable (OTP) memory.

The OV5640 supports both a digital video parallel port and a serial MIPI port.

2.2 architecture

The OV5640 sensor core generates streaming pixel data at a constant frame rate, indicated by HREF and VSYNC.

figure 2-1 shows the functional block diagram of the OV5640 image sensor.

The timing generator outputs signals to access the rows of the image array, precharging and sampling the rows of the

array in series. In the time between pre-charging and sampling a row, the charge in the pixels decreases with the time

exposed to the incident light. This is known as exposure time.

The exposure time is controlled by adjusting the time interval between precharging and sampling. After the data of the

pixels in the row has been sampled, it is processed through analog circuitry to correct the offset and multiply the data

with corresponding gain. Following analog processing is the ADC which outputs 10-bit data for each pixel in the array.

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