GS9021 Datasheet, PDF (1/26 Pages) Gennum Corporation – EDH Coprocessor

GENLINX ^™II GS9021
EDH Coprocessor
FEATURES
• Error Detection and Handling (EDH) according to
SMPTE RP-165
• EDH insertion and extraction in one device
• auto-standard operation with override via host
interface
• noise immune extraction of HVF timing signals
• TRS insertion/correction and ANC header correction
for all standards
• ITU-R-601 output clipping for active picture area
• selectable I²C interface or 8-bit parallel port for access
to EDH flags and device configuration bits
• all error flags available on dedicated output pins
• 24-bit Errored Field counter
• BYPASS mode to bypass EDH insertion/updating
• dynamic blanking control input
• 8-bit or 10-bit compatibility
• up to 54MHz operating frequency
• seamless flag-mapping with GS9020 serial digital
video input processor
• 64 pin LQFP
DESCRIPTION
DATA SHEET
The GS9021 implements error detection and handling
(EDH) according to SMPTE RP-165. Interfacing to the
parallel inputs of either the GS9002, GS9022 or GS9032
serial digital encoders, the GS9021 is primarily used on the
transmit end of the SDI interface. The GS9021 provides
EDH insertion and extraction for 4ƒsc NTSC, 4ƒsc PAL and
all component PAL and NTSC standards including 4:2:2
(13.5MHz and 18MHz luminance sampling), and 4:4:4:4.
The GS9021 generates noise immune timing signals such
as horizontal sync, vertical blanking and field ID. In
addition, TRS-ID correction/insertion and data blanking are
implemented for all standards.
A host interface, configurable as an 8-bit parallel interface
or an I²C (I²C is a registered trademark of Philips) serial
interface allows for communication with a microcontroller.
The interface can be used to read and/or write the
complete set of error flags and override the flag status prior
to re-transmission. A 5-bit flag port provides access to all
error flags on dedicated pins for applications where the
microcontroller is not used. The device automatically
determines the operating standard, but this can be
overridden through the programming interface.
APPLICATIONS
EDH processing for SMPTE 259M serial digital interfaces for
composite and component standards including 4:4:4:4 at
540Mb/s; Noise immune digital sync and timing generation.
Source, destination, distribution and test equipment;
General purpose, TRS formatted, blank video stream
generator with EDH.
ORDERING INFORMATION
PART NUMBER
PACKAGE
GS9021-CFU
64 pin LQFP Tray
GS9021-CTU
64 pin LQFP Tape
TEMPERATURE
0°C to 70°C
0°C to 70°C
HOSTIF_MODE FLAG_MAP
DIN
VBLANKS/L
FLYWDIS
H, V, F
TRS_ ERROR
BLANK_EN
CLIP_TRS
10
HVF
TRS
5 ^{FLYWHEEL DETECTION}
TRS
COMPARE
EDH FLAG
EXTRACTION
CRC
COMPARISON/
CALCULATION
ANCILLARY
CHECKSUM
CALCULATION/
COMPARISON
ANCILLARY
CHECKSUM
CORRECTION
10
ITU-R-601 CLIPPING
TRS BLANKING
TRS INSERTION/
CORRECTION
HOST INTERFACE/
FLAG PORT
ERRORED
FIELD
COUNTER
FLAGS
ERROR FLAGS
&
FORMAT PACKET
10
10
MUX
DATA BUS ¹⁰
REVERSAL
NEW CRC
CALCULATION
I²C INTERFACE
DEDICATED
FLAG PORT
8-BIT
PARALLEL
INTERFACE
BYPASS_EDH
LSB_TOP
DOUT
CRC_MODE
R/T
10
I²C is a registered
Trademark of Philips
BLOCK DIAGRAM
Revision Date: November 1999
Document No. 521 - 65 - 05
GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3
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