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GS1500-CQR Datasheet

  • GS1500-CQR

  • HDTV Serial Digital Deformatter with ANC FIFOs

  • 17頁

  • ETC

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HD-LINX
鈩?/div>
GS1500
HDTV Serial Digital Deformatter
with ANC FIFOs
PRELIMINARY DATA SHEET
FEATURES
鈥?SMPTE 292M compliant
鈥?standards detection/indication for SMPTE 292M levels
A/B,C,D/E,F,G/H,I,J/K,L/M
鈥?NRZI decoding and SMPTE descrambling with
BYPASS option
鈥?line CRC calculation, comparison
鈥?selectable line based CRC re-insertion
鈥?H, V, F timing reference signal (TRS) extraction
鈥?selectable flywheel for noise immune H, V, F extraction
鈥?selectable automatic switch line handling
鈥?selectable TRS and line number re-insertion
鈥?selectable active picture illegal code re-mapping
鈥?ANC data position indication
鈥?ANC data extraction via internal FIFOs
(1024 bytes on Y and C channels)
鈥?configurable FIFO LOAD pulse
鈥?20 bit 3.3V CMOS input data bus
鈥?optimized input interface to GS1545 or GS1540
鈥?single +3.3V power supply
鈥?5V tolerant I/O
APPLICATIONS
SMPTE 292M Serial Digital Interfaces.
ORDERING INFORMATION
PART NUMBER
GS1500-CQR
PACKAGE
128 pin MQFP
TEMPERATURE
0擄C to 70擄C
DESCRIPTION
When interfaced to the Gennum GS1545 HDTV Equalizing
Receiver or GS1540 Non-Equalizing Receiver, the GS1500
performs the final conversion to word aligned data. The
device performs NRZI decoding and de-scrambling as per
SMPTE 292M and word-aligns to the incoming data stream.
Line based CRCs are calculated on the incoming data
stream and are compared against the CRCs embedded
within the data stream.
HVF timing information is extracted from the data stream. A
selectable internal HVF flywheel provides superior noise
immunity against TRS signal errors. The device also detects
and indicates the input video signal standard.
The GS1500 can detect and re-map illegal code words
contained within the active portion of the video signal. The
positions of the embedded ANC data are indicated and the
ANC data may be extracted and accessed by the user
through an internal FIFO interface. Prior to exiting the
device, TRS, Line Numbers and CRCs based on internal
calculations may be re-inserted into the data stream.
GS1500
WB_NI
BP_DSC
BP_FR
3
FW_EN/DIS
FAST_LOCK
2
RESET
TRS_Y/C
F_E/S
2
MUTE
EX/CP
CODE
PROTECT
FM_I/E
R_CLK
2
ANC/DATA
ANC_Y/C
TRS_INS
LN_INS
CRC_INS
3
DATA_OUT
[19:10]
(LUMA)
DATA_IN
[19:0]
INPUT
BUFFER
DESCRAMBLE
FRAME
TRS DETECTION
FLYWHEEL
STANDARD
DETECTION
TRS
EXTRACTION
CRC
CALCULATION
ILLEGAL CODE REMAPPING
ANC DATA DETECTION &
EXTRACTION FIFO'S
CRC
COMPARISON
TRS,
LNUM,
AND CRC
INSERTION
DATA_OUT
[9:0]
(CHROMA)
PCLK_IN
3
2
2 FFRST
ANC_OUT
FF_STA 2
2 [2:0]
[9:0]
FOEN
ANC_DATA
YCS_ERR
REN
[Y:C]
CCS_ERR
WEN
10
3
[H:V:F]
3
FIFO_L
4
2
OEN
LN_ERR
SAV_ERR
EAV_ERR
VD_STD
[3:0]
LINE_CRC_ERR[Y:C]
BLOCK DIAGRAM
Revision Date: November 2000
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: info@gennum.com
www.gennum.com
Document No. 522 - 33 - 00

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