Analog Devices ADV8003, Руководство по оборудованию

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ADV8003 Hardware Manual
Rev. B, August 2013 185
Function
svsp_vin_h[10:0] Description
0x000  Default
0xXXX Horizontal resolution of input video
svsp_vin_v[10:0] , Secondary VSP Map, Address 0xE618[7:0]; Address 0xE619[7:5]
This signal is used to set the vertical resolution of the input video. This register's value will be used while svsp_man_input_res is 1 or
svsp_autocfg_input_vid is 1.
Function
svsp_vin_v[10:0] Description
0x000  Default
0xXXX Vertical resolution of input video
Similarly, if the output timing is not in the SVSP output format table, the output format needs to be set manually. The detailed
configuration instruction is given in the SVSP VOM output port description.
3.3.1.3. Frame Buffer Number
Depending on the type of conversion that is to take place, a certain number of buffers must be allocated for the input/output video data.
Depending on the conversion required, this should be set in the
svsp_fieldbuf_num[2:0] register. svsp_fieldbuf_num[2:0] can be
automatically set per svsp_autocfg_input_vid[7:0] and svsp_autocfg_output_vid[7:0] . The svsp_fieldbuf_num[2:0] register will not
change when crop or album mode is enabled.
svsp_fieldbuf_num[2:0]
, Secondary VSP Map, Address 0xE610[2:0]
This signal is used to set the number of field/frame buffers. This signal needs to be configured while svsp_osd_mode_en is 1.
Function
svsp_fieldbuf_num[2:0] Description
000  Default
XXX Number of field/frame buffers
3.3.1.4. Frame Buffer Address and Size
In order to store video data in external memory in the correct size frames, the buffer size of the external DDR2 memory must be
programmed by the user. These programmed field buffers or frame buffers are allocated by setting the
svsp_fieldbuffer0_addr[31:0] ,
svsp_fieldbuffer1_addr[31:0] , svsp_fieldbuffer2_addr[31:0] and svsp_fieldbuffer3_addr[31:0] registers.
The value programmed into each of these registers is determined in
Equation 19 .
pixel per bytes no height video active width video active size frame _ _ _ _ _ _ _ _
× × =
Equation 19: Calculating External Memory Field Buffers
For example, for an output video resolution of 720p, Equation 19 would yield the following field size:
Field_size = ((1280)x(720))x2 = 1843200
where no_bytes_per_pixel indicates the number of bytes required to store each pixel. Refer to
Table 26 for more details of the number of
bytes required to store each pixel of data.