GS1500 Datasheet, PDF (1/17 Pages) Gennum Corporation – HDTV Serial Digital Deformatter with ANC FIFOs

FEATURES
• SMPTE 292M compliant
• standards detection/indication for SMPTE 292M levels
A/B,C,D/E,F,G/H,I,J/K,L/M
• NRZI decoding and SMPTE descrambling with
BYPASS option
• line CRC calculation, comparison
• selectable line based CRC re-insertion
• H, V, F timing reference signal (TRS) extraction
• selectable flywheel for noise immune H, V, F extraction
• selectable automatic switch line handling
• selectable TRS and line number re-insertion
• selectable active picture illegal code re-mapping
• ANC data position indication
• ANC data extraction via internal FIFOs
(1024 bytes on Y and C channels)
• configurable FIFO LOAD pulse
• 20 bit 3.3V CMOS input data bus
• optimized input interface to GS1545 or GS1540
• single +3.3V power supply
• 5V tolerant I/O
APPLICATIONS
SMPTE 292M Serial Digital Interfaces.
HD-LINX ^™ GS1500
HDTV Serial Digital Deformatter
with ANC FIFOs
PRELIMINARY DATA SHEET
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.
ORDERING INFORMATION
PART NUMBER
PACKAGE
GS1500-CQR
128 pin MQFP
TEMPERATURE
0°C to 70°C
DATA_IN
[19:0]
INPUT
BUFFER
PCLK_IN
WB_NI
BP_DSC
BP_FR
3
FW_EN/DIS
FAST_LOCK
TRS_Y/C
F_E/S
2
RESET
2 _MUTE
EX/CP
FM_I/E
R_CLK
CODE
PROTECT
2
ANC_Y/C ANC/DATA
DESCRAMBLE
FRAME
TRS DETECTION
FLYWHEEL
STANDARD
DETECTION
TRS
EXTRACTION
CRC
CALCULATION
CRC
COMPARISON
ILLEGAL CODE REMAPPING
ANC DATA DETECTION &
EXTRACTION FIFO'S
TRS_INS
LN_INS
CRC_INS
3
TRS,
LNUM,
AND CRC
INSERTION
DATA_OUT
[19:10]
(LUMA)
DATA_OUT
[9:0]
(CHROMA)
3
[H:V:F] 3 _{FIFO_L 4}
10
ANC_OUT
[9:0]
3
2
2 _{FFRST FF_STA 2}
FOEN ² [2:0]
LN_ERR
SAV_ERR
EAV_ERR
VD_STD
2
[3:0]
LINE_CRC_ERR[Y:C]
ANC_DATA
[Y:C]
REN
WEN
YCS_ERR
CCS_ERR
OEN
BLOCK DIAGRAM
Revision Date: November 2000
Document No. 522 - 33 - 00
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
Tel. [phone] Fax. [phone] E-mail: [e-mail]
www.gennum.com