參數(shù)資料
型號(hào): ZR36506
英文描述: Fast Recovery Rectifier Diodes
中文描述: 外圍芯片
文件頁(yè)數(shù): 54/99頁(yè)
文件大?。?/td> 452K
代理商: ZR36506
Zoran ZR36506 USBV ision – Datasheet
Zoran Proprietary and Confidential
8-12
Video Input Interface
Special V ideo Control bits
The ZR36506 has two special bits in the VIN_REG2 register, which may alter the input video
sequence. These bits are normally used during still capture operation and are specified in the
following table:
Parameter
Register
address
Usage
SEND_FID
Reg.28/d5
VIN_REG2
Send FID information in frame header data.
The FID information is used for
reconstructing a 2-field frame from an
Interlaced camera.
0:
1:
Default value.
FID bit overrides bit 0 of
Frame_Phase[4..0].
KEEP_BLANK
Reg.28/d7
VIN_REG2
Force a "blank" position on the input video
frame source, and drop new frames. Software
driver must switch this bit from '0' to '1'
during a true blank position.
0:
Default value.
1:
Keep existing blank longer by
forcing "blank".
US B Pipe V ideo Data Format
Data Packets
Video data is received by the host computer as a stream of bytes via the End-Point #2
Isochronous pipe. There is an incoming data packet every 1 millisecond (every USB-Frame) and
its size is limited by the maximum bandwidth that was initially set for End-Point #2. The
maximum byte-count for each packet is one of the following numbers: 959 (for 7.5Mb/sec), 895,
831, 767, 703, 639, 575, 511, 447, 383, 319, 255, 191, 127, or 63 (for 0.5Mb/sec). Regarding the
data on the USB - the data of a new video frame always starts in a new data packet, so in most
cases the last packet of a video frame is shorter than a normal packet. The ZR36506 sends one or
more empty packets between every two video frames.
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