GS1559 Gennum Corp., GS1559 Datasheet - Page 46

• Manufacturer Part Number: GS1559
• Description: GS1559 HD-LINX-TM II Multi-Rate Deserializer with Loop-Through Cable Driver
• Manufacturer: Gennum Corp.

Table 4-5: Host Interface Description for Programmable Ancillary Data Type Registers (Continued)
4.10.3 SMPTE 352M Payload Identifier
Register Name
ANC_TYPE4
Address: 008h
ANC_TYPE5
Address: 009h
Bit
15-8
7-0
15-8
7-0
Name
ANC_TYPE4[15:8]
ANC_TYPE4[7:0]
ANC_TYPE5[15:8]
ANC_TYPE5[7:0]
The GS1559 can receive and detect the presence of the SMPTE 352M payload
identifier ancillary data packet. This four word payload identifier packet may be
used to indicate the transport mechanism, frame rate and line scanning / sampling
structure.
Upon reception of this packet, the device will extract the four words describing the
video format being transported and make this information available to the host
interface via the four VIDEO_FORMAT_OUT registers
The VIDEO_FORMAT_OUT registers will only be updated if the received
checksum is the same as the locally calculated checksum.
These registers will be cleared to zero, indicating an undefined format, if the device
loses lock to the input data stream (LOCKED = LOW), or if the SMPTE_BYPASS
pin is asserted LOW. This is also the default setting after device reset.
The SMPTE 352M packet should be received once per field for interlaced systems
and once per frame for progressive systems. If the packet is not received for two
complete video frames, the VIDEO_FORMAT_OUT registers will be cleared to
zero.
30572 - 4
July 2005
Description
Used to program the DID for ancillary data detection at
the YANC and CANC output
Used to program the SDID for ancillary data detection
at the YANC and CANC output.
Should be set to zero if no SDID is present in the
ancillary data packet to be detected.
Used to program the DID for ancillary data detection at
the YANC and CANC output
Used to program the SDID for ancillary data detection
at the YANC and CANC output.
Should be set to zero if no SDID is present in the
ancillary data packet to be detected.
GS1559 Data Sheet
(Table
4-6).
R/W
R/W
R/W
R/W
R/W
Default
46 of 74
0
0
0
0