TMC22091/TMC22191
PRODUCT SPECIFICATION
Control Register Definitions (continued)
Format Control Register (01)
7
6
5
4
3
2
1
0
Reserved
LCREN
RAMPEN
CB
FORMAT
INMODE
Reg
Bit
Name
Function
Reserved.
01
01
7
6
LCREN
(TMC22191) Layering Control Register enable. When LOW, the Layering
Control Register is not available and Key Control Register functions are
enabled. In this mode, the TMC22191 functions like the TMC22091. When
HIGH, the Layering Control Register takes the place of the Key Control
Register and enables the layering functions. Data loaded into the Key or
Layering Control Registers will remain but have a different meaning if this bit is
changed.
01
01
01
5
RAMPEN
CB
Modulated ramp test. When LOW (normal), the TMC22x91 encodes and
outputs video corresponding to input data. When RAMPEN and CB are both
HIGH, an internally generated 40 IRE modulated ramp is produced, preempting
input data.
4
Color bar test. When HIGH (normal), the TMC22x91 encodes and outputs
video corresponding to input data. When CB, RAMPEN, and Format Control
Register bit 0 are LOW, internally generated color bars are produced,
preempting input data.
3-2
FORMAT
PD input format select. Two bits select RGB, GBR, or YC C input data.
23-0 B R
When bits 3 and 2 are:
0 0 the CLUT output is interpreted as RGB and is converted to YC C .
B
R
0 1 is reserved. Bits 3 and 2 must be 00 or 10 when the Layering Control
Register is enabled (TMC22191).
1 0 the CLUT output is interpreted as GBR, and is converted to YC C .
B
R
1 1 the CLUT output is interpreted as YC C .
B
R
01
1-0
INMODE
PD
input mode select. These two bits set up the TMC22x91 for either 444,
422, 15-bit, or 8-bit input modes.
23-0
0 0 24-bit/pixel GBR, RGB, or YC C 444 data enters from PD
B
R
23-0
0 1 YC C 422 data enters from PD
; C and C alternate from PD
B
R
23-8
R
B
15-8
1 0 15-bit/pixel GBR or RGB data from PD
14-0
1 1 8-bit/pixel color indexed data enters from PD
.
7-0
Bits 1 and 0 must be 00, 01, or 11 when the Layering Control Register is
enabled (TMC22191).
14
CADEKA [ CADEKA MICROCIRCUITS LLC. ]
