ADV8003 Hardware Manual
Rev. B, August 2013
195
•
Pixel unpacker: reads field/frame from external memory and unpacks memory word to video pixel information
•
VOM cropper: reads cropped images from external memory
•
Output port: generates output timing and output video
Register update protection is provided in the ADV8003. Refer to
3.4 for more details regarding the update of the various VSP
registers.
svsp_lock_vom
, Secondary VSP Map,
Address 0xE610[4]
This bit is used to lock the Video Output Module (VOM). If the Secondary VSP is running and this bit is set to 1, the VOM will be
locked to the current register setting to display the last frame. The Secondary VSP registers can be configured safely in this state. All new
register settings will be updated after this bit is set back to 0.
Function
svsp_lock_vom
Description
0
Unlock VOM
1
Lock VOM
Note
: This register should be used only as part of the gentle reboot protocol. Refer to
Section
3.4.3 for more details.
svsp_update_vom
, Secondary VSP Map,
Address 0xE610[3]
Registers related to the VOM can be updated only when this bit is set to 0. All new register settings will be updated by VOM in next
frame after this bit is set back to 1.
Function
svsp_update_vom
Description
0
Do not update VOM
1
Update VOM
3.3.3.1.
Pixel Unpacker
The pixel unpacker in the VOM of the SVSP is similar to that in the VOM of the PVSP. The pixel unpacker is used to convert external
memory words (128 bits) into video pixel (YCbCr-8-8-8-bit) data. Pixels in external memory can have the following two different data
formats which are the same as those set by the VIM. This is configured in the same way as the VIM.
•
24-bit YCbCr
•
16-bit YCbCr 4:2:2
Data format details are described in
3.3.3.2.
VOM Cropper
The VOM cropper is also very similar to the cropper in the VOM of the PVSP. The following registers are used to configure the VOM
cropper.
•
•
•
•
•
The function of the VOM cropper can be seen in
. To enable the cropper in the SVSP VOM,
should be
asserted.
Summary of Contents for ADV8003
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