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參數(shù)資料
| 型號： | CLC031VEC |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SMPTE 292M/259M Digital Video Deserializer / Descrambler with Video and Ancilliary Data FIFOs |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | TQFP-64 |
| 文件頁數(shù)： | 22/31頁 |
| 文件大?。?/td> | 383K |
| 代理商： | CLC031VEC |
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Device Operation
(Continued)
TABLE 4. Video Raster Format Parameters
Format
Code
[4,3,2,1,0]
00001
00010
00011
01001
01010
01011
10001
10010
10011
11001
11010
11100
11101
10100
Format
Spec.
Frame
Rate
Lines
Active Lines
Samples
Active
Samples
SDTV, 54
SDTV, 36
SDTV, 27
SDTV, 54
SDTV, 36
SDTV, 27
HDTV, 74.25
HDTV, 74.25
HDTV, 74.25
HDTV, 74.25
HDTV, 74.25
HDTV, 74.25
HDTV, 74.25
HDTV, 74.25
RP 174
SMPTE 267
SMPTE 125
ITU-R BT 601.5
ITU-R BT 601.5
ITU-R BT 601.5
SMPTE 260
SMPTE 274
SMPTE 274
SMPTE 274
SMPTE 274
SMPTE 295
SMPTE 274
SMPTE 296 (1, 2)
60I
60I
60I
50I
50I
50I
30I
30I
30P
25I
25P
25I
24P
60P
525
525
525
625
625
625
1125
1125
1125
1125
1125
1250
1125
750
507/487*
507/487*
507/487
*
577
577
577
1035
1080
1080
1080
1080
1080
1080
720
3432
2288
1716
3456
2304
1728
2200
2200
2200
2640
2640
2376
2750
1650
2880
1920
1440
2880
1920
1440
1920
1920
1920
1920
1920
1920
1920
1280
The
HD Only
bit when set to a logic-1 locks the CLC031 into
the high definition data range and frequency. In systems
designed to handle only high definition signals, enabling
HD
Only
reduces the time required for the CLC031 to establish
frequency lock and determine the HD format being pro-
cessed.
The
SD Only
bit when set to a logic-1 locks the CLC031 into
the standard definition data ranges and frequencies. In sys-
tems designed to handle only standard definition signals,
enabling
SD Only
reduces the time required for the CLC031
to establish frequency lock and determine the format being
processed. When
SD Only
and
HD Only
are set to logic-0,
the device operates in SD/HD mode.
The
Framing Mode
bit in the
Format 0
register and
Fram-
ing Enable
in the
Video Info 0
register combine with
Fram-
ing Enable
to control the manner in which the CLC031
aligns framing. When
Framing Mode
and
Framing Enable
are both reset, the CLC031 aligns on the first valid TRS
character. If another TRS occurs that is not on a word
boundary, the NSP bit is set until the next TRS that is on a
word boundary occurs. When
Framing Mode
is set to a
logic-1, the CLC031 operates similarly to the CLC011 when
NSP is tied to FE. An alternative configuration that operates
identically can be achieved with the CLC031 by mapping
NSP
as an output and
Framing Enable
as an input on the
Multifunction I/O bus and externally connecting them. In this
case
Framing Mode
should be reset to a logic-0. When
Framing Mode
is reset and
Framing Enable
is set, the
CLC031 realigns on every valid TRS. The initial state of
Framing Mode
is set following a reset or at power-on.
FORMAT 1 (Address 0Ch)
The CLC031 automatically determines the format of the
incoming serial data. The result of this operation is stored in
the
FORMAT 1
register. The
Format[4:0]
bits identify which
of the many possible video data standards that the CLC031
can process is being received. These format codes follow
the same arrangement as for the
Format Set[4:0]
bits.
These formats and codes are given in
Table 4
. Bit
Format[4]
when set indicates that HD data is being processed. When
reset, SD data is indicated.
Format[3]
when set indicates
that PAL data is being processed. When reset NTSC data is
being processed.
Format[2:0]
correspond with one of the
sub-standards given in the table. Note that the CLC031 does
not distinguish or log the data rate differences between HD
data at 74.25Mhz and 74.25MHz/1.001.
The
H, V, and F
bits correspond to input TRS data bits 6, 7
and 8, respectively. The meaning and function of this data is
the same for both standard definition (SMPTE 125M) and
high definition (SMPTE 292M luminance and colour differ-
ence) video data. Polarity is logic-1 equals HIGH-true. These
bits are registered for the duration of the applicable field.
TEST 0 REGISTER (Address 0Dh)
The
Test Pattern Select
bits determine which test pattern is
output when the Test Pattern Generator (TPG) mode or the
Built-in Self-Test (BIST) mode is enabled.
Table 5
gives the
codes corresponding to the various test patterns. All HD
colour bar test patterns are inherently BIST data. BIST test
patterns for SD are: NTSC, 27MHz, 4x3 Colour Bars and
PAL, 27MHz, 4x3 PLL Pathological.
The
TPG Enable
bit when set to a logic-1 enables the Test
Pattern Generator function and built-in self-test (BIST).
The
Pass/Fail
bit indicates the result of the built-in self-test.
This bit is a logic-1 for a pass condition.
C
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