ADV8003 Hardware Manual
Rev. B, August 2013
149
Function
pvsp_vin_v[10:0]
Description
0x000
Default
0xXXX
Vertical resolution of input video
Similarly, if the output timing is not in the PVSP output format table, customized output format needs to be set manually. The detailed
configuration instructions are given in the PVSP VOM output port description.
3.2.1.3.
Field/Frame Buffer Number
Depending on the type of conversion that is to take place, a number of buffers must be allocated for the input/output video data.
Depending on the conversion required, this should be set in the
can be automatically set
and
The
register does not change when crop or album
mode is enabled.
pvsp_fieldbuf_num[2:0]
, Primary VSP Map,
Address 0xE829[2:0]
Sets the number of field/frame buffers.
Function
pvsp_fieldbuf_num[2:0]
Description
000
Default
XXX
Number of field/frame buffers
3.2.1.4.
Field/Frame Buffer Address and Size
In order to store video data in external memory in the correct size fields, the buffer size of the external DDR2 memory must be
programmed by the user. Configuring this manually allows the user to have very flexible control over the external DDR memory.
These programmed field buffers or frame buffers are allocated by setting the following registers:
The value programmed into each of these registers is determined by
pixel
per
xbytes
height
video
active
width
video
active
size
field
_
_
TO_P
PVSP_IS_I_
1
)
_
_
_
_
(
_
+
×
≡
Equation 16: Calculating External Memory Field Buffers
where:
•
PVSP_IS_I_TO_P indicates whether the input timing is interlaced or progressive (interlaced = 1, progressive = 0)
•
bytes_per_pixel
indicates the number of bytes required to store each pixel (refer to
for more details on the number of
bytes required per pixel)
For example, for an input video resolution of 720p,
would yield the following field size:
Field_size = ((720)x(1280))x4 = 3686400
The following values would then need to be programmed to the above registers:
= 0
= 38400 (3686400 in hex)
Summary of Contents for ADV8003
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