TMC22091/TMC22191
PRODUCT SPECIFICATION
Control Register Definitions (continued)
Standards Control Register (0F)
7
6
5
4
3
2
1
0
EFEN
SIX25
PALID
SETUP
YGAIN
CGAIN
Reg
Bit
7
Name
EFEN
SIX25
Function
0F
0F
Same as Register 0E bit 7, but read-only.
6
Select 625 lines per frame. When HIGH, the encoder assumes 625 line per
frame. When LOW, 525 lines per frame are assumed.
0F
0F
0F
5
PALID
SETUP
YGAIN
PAL select. When HIGH, Phase alternate line (PAL) operation is selected.
When LOW, operation conforms to NTSC standards.
4
Setup enable. When HIGH, a 7.5 IRE Pedestal is added to the output video.
when LOW, no pedestal is added.
3-2
Luminance gain settings are adjusted to conform to the following NTSC and
PAL standards:
0 0 NTSC without SETUP
0 1 NTSC-A and PAL-M
1 0 PAL-I and PAL-N
1 1 Reserved
0F
1-0
CGAIN
Chrominance gain settings are adjusted to conform to the following NTSC and
PAL standards:
0 0 NTSC without SETUP
0 1 NTSC-A and PAL-M
1 0 PAL-I and PAL-N
1 1 Reserved
Timing Registers (10-17)
Reg
Bit
Name
Function
10
7-0
SY
Horizontal sync tip length. This 8-bit register holds a value extending from 0 to
255 PCK cycles.
11
12
13
14
7-0
7-0
7-0
7-0
BR
Breezeway length. This 8-bit register holds a value extending from 0 to 255
PCK cycles.
BU
Burst length. This 8-bit register holds a value extending from 0 to 255 PCK
cycles.
CBP
XBP
Color back porch length. This 8-bit register holds a value extending from 0 to
255 PCK cycles.
Extended color back porch 8 LSBs. This 8-bit register holds the LSBs of a
10-bit value extending from 0 to 1023 PCK cycles. The two MSBs are located in
control register 18.
15
16
17
7-0
7-0
7-0
VA
VC
VB
Active video 8 LSBs. This 8-bit register holds the LSBs of a 10-bit value
extending from 0 to 1023 PCK cycles. The two MSBs are located in control
register 18.
Active video start 8 LSBs. This 8-bit register holds the LSBs of a 10-bit value
which is the initial half active video length extending from 0 to 1023 PCK cycles.
The two MSBs are located in control register 18.
Active video end 8 LSBs This 8-bit register holds the LSBs of a 10-bit value
which is the end half active video length extending from 0 to 1023 PCK cycles.
The two MSBs are located in control register 18.
20
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