SPEAR1340 datasheet(29/200 Pages) STMICROELECTRONICS

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SPEAr1340

Device functions

Doc ID 023063 Rev 4

29/200

2.24

Camera input interfaces (CAM)

The SPEAr1340 device integrates 4 instances of a camera input (CAM) digital block,

identified as CAM1, CAM2, CAM3, CAM4.

Each CAM interface enables SPEAr1340 to interface with an external image sensor. An

incoming image is stored in CAMIF memory per a programmed mode, and then transferred

to external memory using system direct memory access.

Main features:

●

AMBA 2.0 compatible

●

Slave interface with connection to external system DMA

●

8-bit parallel data interface

●

YCbCr4:2:2, RGB888 packed, RGB888 un-packed, RGB565, JPEG mode

●

Video mode with all running frame

●

Compliant with ITU-R BT.601 (External synchronization) as well as ITU-R BT.656

(embedded synchronization)

●

Image cropping

●

Programmable polarity of pixel clock and external synchronization signals (HSYNCH,

VSYNCH)

Note:

For 1080p 30 Hz video maximum pixel clock frequency for CAM required is

(2x2200x1125x30)=148.5 MHz.

2.25

Video input parallel port (VIP)

The video input parallel port is used to interface with some external image sensors.

Incoming images are stored inside its internal FIFO as per some programmed mode and

then transferred to the external memory through the master interface.

Main features:

●

Supports HDMI, DVI, DP and CVBS

●

Supports output format RGB along with HSYNC, VSYNC and pixel clock

●

Clock polarity configuration provided (Positive edge/Negative edge)

●

HSYNC and VSYNC polarity configurable

●

Handling of data enable signal

●

Dual-port display in DVI mode for 16 bpp and 24 bpp supported

●

Input bit width 16 bpp, 24 bpp and 32 bpp supported

●

Only unpacked data format supported

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