Av Code Block - Analog Devices Advantiv ADV7619 Hardware User's Manual

UG-237
C_OFFSET[9:0] , Addr 44 (CP), Address 0x79[1:0]; Address 0x7A[7:0]
A control to set the manual offset for Channel C.
This field stores an unsigned value. To change C_OFFSET[9:0], Register Address 0x79 and Register Address 0x7A must be written to in
2
this order with no I C access in between.
Function
C_OFFSET[9:0]
0x3FF (default)
Any other value
Note: To change the A_OFFSET[9:0] value, Register 0x77 and Register 0x78 must be written to in this order with no other I
between.

AV CODE BLOCK

The AV code block is used to insert AV codes into the video data stream. The codes follow the standards outlined in ITU-R BT.656 - 4.
The following functions are supported by this block:
•
AV code insertion can be enabled or disabled.
•
Data between the end of active video (EAV) and the start of active video (SAV) can be blanked, for example, overwritten with default
values. This function can be enabled or disabled. In addition, the default blanking value can be set for RGB or YPbPr.
•
AV codes can be output on all channels or spread across the Y and PrPb buses for 20-bit output modes.
•
F and V bits within the codes can be inserted directly or can be inverted before insertion.
•
The position of the codes within the data stream (timing of the insertion) can be set to a default or can be slaved off the signal from
the selected HS input pin.
The insertion point for the AV codes is predetermined by default and is adjusted automatically to suit the current video standard as per
the PRIM_MODE[3:0] and VID_STD[5:0] settings. To cater for nonstandard signals, however, the AV code insertion point can also be
taken off the HSync signal before it goes to the selected HS input pin. This gives the user great flexibility since the HSync signal position
can be programmed to quite a wide range with LLC accuracy.
AVCODE_INSERT_EN , IO, Address 0x05[2]
A control to select AV code insertion into the data stream.
Function
AVCODE_INSERT_EN Description
0 Does not insert AV codes into data stream
1 (default) Inserts AV codes into data stream
AV_POS_SEL , Addr 44 (CP), Address 0x7B[2]
A control to select AV codes position.
Function
AV_POS_SEL Description
0 SAV code at HS falling edge and EAV code at HS rising edge
1 (default) Uses predetermined (default) positions for AV codes
AV_INV_V , Addr 44 (CP), Address 0x7B[6]
A control to invert V bit in AV codes.
Function
AV_INV_V Description
0 (default) Do not invert V bit polarity before inserting it into the AV code
1 Invert V bit polarity before inserting it into the AV code
Description
Auto offset to Channel C
Channel C offset
Rev. A | Page 124 of 204
Hardware User Guide
2
C access in