PRODUCT SPECIFICATION
TMC2490A
Control Register Definitions
(continued)
Video Output Control Register (05)
7
PALN
Reg
05
Bit
7
6
BURSTF
Name
PALN
5
CHRBW
4
SYNCDIS
3
BURDIS
2
LUMDIS
1
CHRDIS
0
PEDEN
Description
Select PAL-N Subcarrier.
When HIGH, selects PAL-N subcarrier
frequency. When LOW, the encoder produces the PAL-B,G,H,I subcarrier.
Program LOW for NTSC and PAL-M video.
Burst flag disable.
When BURSTF is LOW, a clamp gate signal is
produced on the D1 output and register 0E bit 1.
Chroma bandwidth select.
When LOW, the chrominance bandwidth is
±650
kHz. When HIGH, the chrominance bandwidth is
±1.3
MHz.
Sync pulse disable.
When HIGH, horizontal and vertical sync pulses on the
COMPOSITE video output are suppressed (to blanking level). Color burst,
active video, and the CSYNC output remain active. Set LOW for normal
composite video operation.
Color burst disable.
When HIGH, color burst is suppressed to the blanking
level. Set LOW for normal operation.
Luminance disable.
When HIGH, incoming Y values are forced to black
level. Color burst, CHROMA, and sync are not affected. Set LOW for normal
operation.
Chrominance disable.
When HIGH, incoming color components C
B
and
C
R
are suppressed, enabling monochrome operation. Output color burst is
not affected. Set LOW for normal color operation.
Pedestal enable.
When LOW, black and blanking are the same level for
ALL lines. When HIGH, a 7.5 IRE pedestal is inserted into the output video
for NTSC and PAL-M lines 23-262 and 286-525 only. Chrominance and
luminance gain factors are adjusted to keep video levels within range.
PEDEN is valid for NTSC and PAL-M only and should be LOW for all other
formats.
05
05
05
6
5
4
BURSTF
CHRBW
SYNCDIS
05
05
3
2
BURDIS
LUMDIS
05
1
CHRDIS
05
0
PEDEN
Field Data Register (06)
7
Reserved
Reg
06
06
06
Bit
7–6
5–3
2–0
Name
Reserved
FIELD
Reserved
6
5
4
FIELD
Description
Program LOW.
Field ID (Read only).
A value of 000 corresponds to field 1 and 111
corresponds to field 8.
Program LOW.
3
2
1
Reserved
0
7
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
