參數(shù)資料
型號： TMC2192KHC
廠商： FAIRCHILD SEMICONDUCTOR CORP
元件分類： 顏色信號轉(zhuǎn)換
英文描述： 10 Bit Encoder
中文描述： COLOR SIGNAL ENCODER, PQFP100
封裝： MQFP-100
文件頁數(shù)： 27/69頁
文件大?。?/td> 457K
代理商： TMC2192KHC
PRODUCT SPECIFICATION
TMC2192
REV. 1.0.0 8/13/03
27
Ancillary frequency data is used to program the 32 bits of the
FREQ3-0 registers. ANCFREN and FRV determine how
ancillary frequency data is used. When ancillary data is not
present, the TMC2192 assumes FRV = LOW.
Table 16. Ancillary Data Control Frequency
Note:
1. The F bit is part of the EAV timing reference code and tracks the F0 bit.
Operating Modes
The field number bits (F
2-0
) from the ancillary data packet
FIELD word, are used to program the encoder’s field counter
depending upon the state of the synchronous video flag
(SVF) and the ANCTREN bit in the control register.
In the basic operating mode (ANCTREN = LOW), all timing
is found in the F bit of EAV. F
2-0
and SVF are ignored and
the encoder subcarrier synthesizer is reset to the PHASE
value every eight fields (when the field counter transitions
from 111 (field 8) to 000 (field 1).
In the basic mode, ANCFREN and ANCPHEN are typically
set LOW, ignoring ancillary frequency and phase data. If
ANCFREN and ANCPHEN are HIGH, the TMC2192 uses
the incoming ancillary frequency and phase data on a line-
by-line basis.
In genlocking mode (ANCTREN and SVF = HIGH), the
subcarrier synthesizer is allowed to free run, with phase and
frequency being set from the ancillary data packet PH
12-0
and FR
31-0
data. The field counter increments just like it
does in basic mode.
Field sequence mode (ANCTREN = HIGH and SVF =
LOW), is the same as basic mode except that the field
counter is set by the F
2-0
bits in the FIELD word of ancillary
data. If ancillary data is not present on a line, the field
counter will continue to count as it does in basic mode.
When ancillary data is present, the contents of the field
counter are loaded with field data (F
2-0
). In this way, the
TMC2192 may be synchronized with an external source by
sending field data only once.
Table 15. Ancillary Data Control
–
Phase
ANCPHEN
0
PHV
x
Description
Ignore ancillary phase data,
set PHASE = 0
Ignore ancillary phase data,
no change to PHASE
Load ancillary phase data into
PHASE registers
1
0
1
1
ANCFREN
0
FRV
x
Description
Ignore ancillary frequency
data
Ignore ancillary frequency
data
Load ancillary frequency data
into FREQ3-0 registers
1
0
1
1
Table 17. Field Identi
fi
cation and Subcarrier Reset Modes
ANCTREN
Basic Mode
SVF
F
2
F
1
F
0
F (EAV)
Field ID / Subcarrier Reset Mode
0
0
x
x
x
x
x
x
x
x
0
1
Odd
fi
eld, reset subcarrier every 8
fi
elds
Even field
Genlocking Mode
1
1
Field Sequence Mode
1
1
1
1
1
1
1
1
1
1
x
x
x
x
x
x
0
1
Odd
fi
eld, subcarrier free run
Even
fi
eld
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Field 1, reset subcarrier at field 1
Field 2
Field 3
Field 4
Field 5
Field 6
Field 7
Field 8
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