TMC22191 CADEKA [Cadeka Microcircuits LLC.], TMC22191 Datasheet - Page 16

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

TMC22091/TMC22191
Control Register Definitions
Test Control Register (03)
16
Reg
03
03
03
03
03
03
03
03
Reserved
7
Bit
7
6
5
4
3
2
1
0
Name
LIMEN
TESTEN
HOLDEN
TSTMSB
LUMTST
8FSUBR
CHRTST
LIMEN
6
TESTEN
Function
Reserved.
Luminance limiter enable. When LOW, all luminance values are passed to
modulator. when HIGH, luminance values are limited to 101 IRE.
Test enable. When LOW, normal operation is enabled. When HIGH,
TESTDAT
D/A converters (WRITE) for test.
MSBs/LSBs hold select. When LOW, alternates MSBs and LSBs in test, at
PXCK rate. When HIGH, reads/writes only MSBS or LSBS in test (per
TSTMSB, bit 3)
LSBS,MSBS hold select. When LOW, connects 2 LSBs to TESTDAT
for testing when TESTEN is HIGH. When HIGH, connects 8 MSBs to
TESTDAT
LUMA channel test. When LOW (normal), the luminance D/A converter is
driven from luminance channel. When HIGH, the luminance D/A converter is
driven from TESTDAT for testing when TESTEN is HIGH.
8-field subcarrier reset enable. When LOW, the internal subcarrier generator is
reset with frequency and phase data from FREQ, SYSPH, and BURPH
registers every eight fields. When HIGH, the internal subcarrier generator free-
runs on the basis of frequency and phase data from the last time it was reset.
When RESET goes LOW, the subcarrier frequency and phase will be reset
from FREQ, SYSPH, and BURPH after field 8.
CHROMA channel test. When LOW (normal), the chrominance D/A converter is
driven from chrominance channel. When HIGH, the chrominance D/A converter
is driven from TESTDAT when TESTEN is HIGH.
5
(continued)
7-0
7-0
HOLDEN
(Register 40) is connected to the composite output (READ) and
for testing when TESTEN is HIGH.
4
TSTMSB
3
LUMTST
2
8FSUBR
PRODUCT SPECIFICATION
1
1-0
CHRTST
0