Datasheet
ADV7320/ADV7321
Rev. A | Page 61 of 88
HSYNC/VSYNC OUTPUT CONTROL
The ADV7320/ADV7321 have the ability to accept either embedded time codes in the input data, or external Hsync and Vsync signals on
P_HSYNC
/
P_VSYNC
, outputting the respective signals on the
S_HSYNC
and
S_VSYNC
pins.
Table 36. Hsync Output Control
1
HD/ED
2
Slave Mode
(0x10, Bit 2)
HD/ED Sync
Output Enable
(0x02, Bit 7)
SD Sync
Output Enable
(0x02, Bit 6)
I2C_Hsync_gen_sel
(0x14, Bit 1)
Signal on
S_HSYNC
Pin
Duration
x 0 0 x Tristate –
x 0 1 x Pipelined SD Hsync
See
Appendix 5—
SD Timing Modes
External Hsync and
Vsync/Field Mode
1 x 0
External Pipelined HD/ED
Hsync
As per Hsync
timing
EAV/SAV Mode 1 x 0
Pipelined HD/ED Hsync based
on AV Code H bit
Same as line
blanking interval
x 1 x 1
Pipelined HD/ED Hsync
based on horizontal counter
Same as
embedded Hsync
1
In all HD/ED standards where there is an Hsync o/p, the start of the Hsync pulse is aligned with the falling edge of the embedded Hsync in the output video.
2
ED = enhanced definition.
Table 37. Vsync Output Control
1
HD/ED
2
Slave Mode
(0x10, Bit 2)
HD/ED Sync
Output Enable
(0x02, Bit 7)
SD Sync
Output Enable
(0x02, Bit 6)
I2C_Vsync _gen_sel
(0x14, Bit 2)
Video Standard
Signal on
S_VSYNC
Pin
Duration
x 0 0 x x Tristate –
x 0 1 x Interlaced
Pipelined SD
Vsync/field
See
Appendix
5—SD Timing
Modes
External Hsync and
Vsync/Field Mode
1 x 0 x
External pipelined
HD/ED Vsync or
field signal
As per external
Vsync or field
signal
EAV/SAV Mode 1 x 0
All HD interlace
standards
External pipelined
field signal based
on AV Code F bit
Field
EAV/SAV Mode 1 x 0
All HD/ED
progressive
standards
Pipelined Vsync
based on AV
Code V bit
Vertical
blanking
interval
x 1 x 1
All HD/ED stan-
dards except
525p
External pipelined
HD/ED Vsync based
on vertical counter
Aligned with
serration lines
x 1 x 1 525p
External pipelined
HD/ED
VSYNC
based on vertical
counter
Vertical
blanking
interval
1
In all HD/ED standards where there is an Hsync o/p, the start of the Hsync pulse is aligned with the falling edge of the embedded Hsync in the output video.
2
ED = enhanced definition = progressive scan 525p or 625p.