參數(shù)資料
型號: MCIMX537CVV8C
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 800 MHz, RISC PROCESSOR, PBGA529
封裝: 19 X 19 MM, 0.80 MM PITCH, ROHS COMPLIANT, PLASTIC, TEPBGA-529
文件頁數(shù): 155/172頁
文件大小: 4562K
代理商: MCIMX537CVV8C
Electrical Characteristics
i.MX53 Applications Processors for Industrial Products, Rev. 3
Freescale Semiconductor
83
4.7.8.2
Sensor Interface Timings
There are three camera timing modes supported by the IPU.
4.7.8.2.1
BT.656 and BT.1120 Video Mode
Smart camera sensors, which include imaging processing, usually support video mode transfer. They use
an embedded timing syntax to replace the SENSB_VSYNC and SENSB_HSYNC signals. The timing
syntax is defined by the BT.656/BT.1120 standards.
This operation mode follows the recommendations of ITU BT.656/ ITU BT.1120 specifications. The only
control signal used is SENSB_PIX_CLK. Start-of-frame and active-line signals are embedded in the data
stream. An active line starts with a SAV code and ends with a EAV code. In some cases, digital blanking
is inserted in between EAV and SAV code. The CSI decodes and filters out the timing-coding from the data
stream, thus recovering SENSB_VSYNC and SENSB_HSYNC signals for internal use. On BT.656 one
component per cycle is received over the SENSB_DATA bus. On BT.1120 two components per cycle are
received over the SENSB_DATA bus.
4.7.8.2.2
Gated Clock Mode
The SENSB_VSYNC, SENSB_HSYNC, and SENSB_PIX_CLK signals are used in this mode. See
Figure 44. Gated Clock Mode Timing Diagram
A frame starts with a rising edge on SENSB_VSYNC (all the timings correspond to straight polarity of the
corresponding signals). Then SENSB_HSYNC goes to high and hold for the entire line. Pixel clock is valid
as long as SENSB_HSYNC is high. Data is latched at the rising edge of the valid pixel clocks.
2 The MSB bits are duplicated on LSB bits implementing color extension
3 The two MSB bits are duplicated on LSB bits implementing color extension
4 RGB 16 bits – supported in two ways: (1) As a “generic data” input – with no on-the-fly processing; (2) With on-the-fly
processing, but only under some restrictions on the control protocol.
5 YCbCr 16 bits - supported as a “generic-data” input – with no on-the-fly processing.
6 YCbCr 16 bits - supported as a sub-case of the YCbCr, 20 bits, under the same conditions (BT.1120 protocol).
7 YCbCr, 20 bits, supported only within the BT.1120 protocol (syncs embedded within the data stream).
SENSB_VSYNC
SENSB_HSYNC
SENSB_PIX_CLK
SENSB_DATA[19:0]
invalid
1st byte
n+1th frame
invalid
1st byte
nth frame
Active Line
Start of Frame
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