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TMC2192
PRODUCT SPECIFICATION
26
REV. 1.0.0 8/13/03
Analog outputs of the TMC2192 are driven by three 10 bit
D/A converters, operating at twice the pixel rate. The outputs
drive standard video levels into 37.5 or 75 Ohm loads. An
internal voltage reference is used to provide reference cur-
rent for the D/A converters. For more accurate levels, an
external fixed or variable voltage reference source is accom-
modated. The video signal levels from the TMC2192 may be
adjusted by varying the common Vref or the 3 independent
Rrefs. Each video D/A converter has an independent refer-
ence resistor that can adjust the output gain. D/A Matching
is achieved by trimming the each external reference resistor
of each D/A.
Digital Composite Output
In addition, the TMC2192 supplies a 10 bit digital composite
signal on pins D[7:0] and FLD[2:1]. The digital composite
output can be either an interpolated signal on a non-interpo-
lated signal, this controlled by the control register
SEL_CLK.
Ancillary Data
Control Registers for this section
The TMC2192 is designed to accept 15 words of ancillary
data after the active video pixels at the end of each horizontal
line. Ancillary data may occur once per line, once per field,
once per eight fields, on random lines, or not al all. The
TMC2192 does not assume ancillary data is present on a reg-
ular basis.
Note:
1. P = odd parity bit, x = reserved bit will be ignored
The first three words of ancillary data comprise the TRS sig-
nal (ANC2-0) which indicates the end of active video. Also
known as the Ancillary data header, the TRS signal is a 00
h
,
FF
h
, FF
h
sequence. Except for the TRS words, ancillary data
bit 0 (B
0
, LSB) is odd parity for B
7-1
.
The data type word (TT) is used to specify the ancillary data
type. The TMC2192 compares this 7 bit value with the con-
tents of the ANCID control register. If there is a match, the
ancillary data will be processed. If there is no match, the
TMC2192 ignores ancillary data.
The word count data (D
11-0
in MM, LL) in the ancillary data
packet indicate the number of words in ancillary data.
Ancillary phase data is used to program the MSBs of the
PHASE register. ANCPHEN and PHV determine how ancil-
lary phase data is used. When ancillary data is not present,
the TMC2192 assumes PHV = LOW.
Address
0x07
0x07
0x07
0x08
Bit(s)
2
1
0
7-0
Name
ANCFREN
ANCPHEN
ANCTREN
ANCID
Table 14. Ancillary Data Format
Word ID
ANC2
ANC1
ANC0
TT
MM
LL
FIELD
Description
Ancillary Data Header (Timing
Reference Signal)
B
7
0
1
1
TT6
0
0
x
x
PHV
PH
6
FRV
FR
27
FR
20
FR
13
FR
6
B
6
0
1
1
TT5
D11
D5
x
x
PH
12
PH
5
x
FR
26
FR
19
FR
12
FR
5
B
5
0
1
1
TT4
D10
D4
x
x
PH
11
PH
4
x
FR
25
FR
18
FR
11
FR
4
B
4
0
1
1
TT3
D9
D3
SVF
x
PH
10
PH
3
FR
31
FR
24
FR
17
FR
10
FR
3
B
3
0
1
1
TT2
D8
D2
F2
x
PH
9
PH
2
FR
30
FR
23
FR
16
FR
9
FR
2
B
2
0
1
1
TT1
D7
D1
F1
x
PH
8
PH
1
FR
29
FR
22
FR
15
FR
8
FR
1
B
1
0
1
1
TT0
D6
D0
F0
x
PH
7
PH
0
FR
28
FR
21
FR
14
FR
7
FR
0
B
0
0
1
1
P
P
P
P
P
P
P
P
P
P
P
P
Data Type
Word
Count
Field ID/Synchronous Video Flag
reserved
Subcarrier Phase
PH1
PH0
FR4
FR3
FR2
FR1
FR0
Subcarrier Frequency