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GS1501 Schematic ( PDF Datasheet ) - Gennum Corporation

Teilenummer GS1501
Beschreibung HDTV Serial Digital Formatter
Hersteller Gennum Corporation
Logo Gennum Corporation Logo 




Gesamt 15 Seiten
GS1501 Datasheet, Funktion
www.DataSheet4U.com
KEY FEATURES
• SMPTE 292M compliant
• NRZ(I) encoding
• SMPTE 292M scrambler with BYPASS option
• internal FIFOs for ANC data insertion
(1024 Bytes on Y and C channels)
• selectable TRS insertion
• selectable line number insertion
• selectable line based CRC insertion
• selectable active picture illegal code re-mapping
• 20 bit 3.3V CMOS compatible input data bus
• optimized output interface to GS1522
• single +3.3V power supply
• 5V tolerant I/O
APPLICATIONS
SMPTE 292M Serial Digital Interfaces
+'/,1; GS1501
HDTV Serial Digital Formatter
with ANC FIFOs
DATA SHEET
DESCRIPTION
The GS1501 HDTV Serial Digital Formatter formats the
HDTV Luma and Chroma data according to SMPTE 292M
prior to serialization by the GS1522 HDTV Serializer. The
GS1501 optionally inserts TRS and line number signals
based on externally supplied H, V and F signals. The
device also allows the insertion of CRCs based on TRS
signals embedded in the input data streams, should the
user choose not to supply external HVF signals.
Following the insertion of TRS, Line Number, and CRC,
protected words of 000-003 and 3FC to 3FF occurring
during the active video period are optionally re-mapped to
004 and 3FB respectively. In addition, ANC data may be
inserted into the video stream through an internal FIFO
interface. Prior to exiting the device SMPTE 292M compliant
NRZ(I) encoding and scrambling may be performed on the
data stream.
TRS_Y/C
DET_TRS
2
FOEN
FM_I/E
ANC_Y/C
FFRST
2
CODE
PROTECT
TRS_INS
LN_INS
CRC_INS
3
DATA_IN
[19:10]
(LUMA)
DATA_IN
[9:0]
(CHROMA)
PCLK_IN
INPUT
BUFFER
and
BLANKER
BLANK
TRS
and
LINE NUMBER
DETECTION
ANC DATA
INSERTION
FIFOS
ILLEGAL CODE
REMAPPING
TRS
INSERTION
LINE NUMBER
INSERTION
CRC INSERTION
3 10 2
[H:V:F]
RSTLN
ANC_IN[9:0] W_CLK
FM_I/E
2
3
REN
WEN
FF_STA
[2:0]
GS1501 FUNCTIONAL BLOCK DIAGRAM
BP_SC
NRZI
ENCODER
SMPTE
SCAMBLER
DATA_OUT
[19:0]
SRST OEN
Revision Date: July 2002
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. +1 (905) 632-2996 Fax. +1 (905) 632-5946 E-mail: [email protected]
www.gennum.com
Document No. 52234 - 4






GS1501 Datasheet, Funktion
1.2 PIN DESCRIPTIONS (Continued)
PIN NUMBER
NAME
75, 74, 73
FF_STA[2:0]
76, 77, 80, 83,
84, 85, 86, 87,
88, 89
ANC_IN[9:0]
92 W_CLK
TIMING
Synchronous
wrt W_CLK
N/A
TYPE
Output
Input
Input
DESCRIPTION
Control Signal Output. FF_STA[2:0] is the FIFO status output to
indicate the content level of the internal FIFO.
FF_STA[2:0]=000: Error flag, FIFO is under run.
FF_STA[2:0]=001: FIFO is empty.
FF_STA[2:0]=010: FIFO is almost empty (32 bytes filled).
FF_STA[2:0]=011: FIFO is ready.
FF_STA[2:0]=100: FIFO is half full.
FF_STA[2:0]=101: FIFO is almost full (992 bytes filled).
FF_STA[2:0]=110: FIFO is full.
FF_STA[2:0]=111: Error flag, FIFO is over run.
When ANC_Y/C is high, FF_STA indicates the status of the
LUMA ANC data buffer. When ANC_Y/C is low, it indicates the
status of the CHROMA ANC data buffer. See timing diagrams
Figures 5 to 14 and Table 1.
ANC Data Input Bus. ANC data to be inserted into the video
stream is supplied via the ANC_IN[9:0] input data port.
ANC_IN[9] is the MSB (pin 76) and ANC_IN[0] is the LSB (pin
89). When FM_I/E=1, ANC data intended to be placed into the
current HANC region is written into the internal FIFO during the
time that the preceding active video region is passing through
the device. The device begins inserting ANC data stored in the
FIFO immediately after the line based CRC words regardless of
any other ANC data that may be present in the stream (i.e. the
device will over-write existing ANC data in the data stream).
Input Clock. Used to write information to the internal FIFO. On
the rising edge of W_CLK, externally supplied ANC data may
be written into the internal LUMA or CHROMA FIFO as
determined by ANC_Y/C.
GENNUM CORPORATION
6
52234 - 4

6 Page









GS1501 pdf, datenblatt
PCLK_IN
DATA_IN[19:10]
(LUMA)
REN
WORD521 WORD522 WORD523 WORD524 WORD525 WORD526
(Low)
W_CLK
FF_STA[2:0]
100
(Half Full)
Fig. 7 FIFO Half Full to Ready Read Timing
011
(Ready)
PCLK_IN
DATA_IN[19:10]
(LUMA)
REN
WORD998 WORD999
WORD
1000
WORD
1001
WORD
1002
WORD
1003
(Low)
W_CLK
FF_STA[2:0]
011
(Ready)
010
(Almost Empty)
Fig. 8 FIFO Ready to Almost Empty Read Timing
PCLK_IN
DATA_IN[19:10]
(LUMA)
REN
WORD
1028
WORD
1029
WORD
1030
WORD
1031
WORD
1032
WORD
1033
Set High 9 Cycles Before Point Where Reading
Data From FIFO And Writing It Into The Luma
Stream Is To Stop
WORD
1034
WORD
1035
WORD
1036
WORD
1037
WORD
1038
WORD
1039
W_CLK
FF_STA[2:0]
010
(Almost Empty)
001
(Empty)
000
(Read Error)
001
(Empty)
GENNUM CORPORATION
Fig. 9 FIFO Almost Empty to Empty to Read Error Timing
12
52234 - 4

12 Page





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