TMC22191 CADEKA [Cadeka Microcircuits LLC.], TMC22191 Datasheet - Page 18

• Manufacturer Part Number: TMC22191
• Description: Digital Video Encoders/Layering Engine
• Manufacturer: CADEKA [Cadeka Microcircuits LLC.]

TMC22091/TMC22191
Control Register Definitions
Layering Control Register (04) (TMC22191)
Key Value Registers (05-07)
18
Reg
04
04
04
04
04
04
Reg
05
06
07
LAYMODE
7
Bit
7
6
5
4
3-1
0
Bit
7-0
7-0
7-0
Name
LAYMODE
HKEN
BUKEN
SKEXT
LAYMODE
SKEN
Name
DKEY
EKEY
FKEY
HKEN
6
BUKEN
Function
MSB of Layer Assignments select.
Hardware key enable. When LOW, the KEY input pin ignored. When HIGH, the
KEY input pin is enabled.
Burst key enable. When LOW, output video burst is generated on TMC22191.
When HIGH, output burst is taken from genlock input data.
Data key operation select. When LOW, data keying is allowed only during
active video. When HIGH, data keying is allowed during active video and
blanking.
Three LSBs of Layer Assignments select.
Data key enable. When LOW, data keying is disabled. When HIGH, data keying
is enabled.
Function
Green/red/Y data key value. Eight bits hold the match value which triggers
keying on red/Y.
Blue/green/U data key value. Eight bits hold the match value which triggers
keying on green/U.
Red/blue/V key value. Eight bits hold the match value which triggers keying on
blue/V.
5
(continued)
SKEXT
4
3
LAYMODE
2
PRODUCT SPECIFICATION
1
SKEN
0