GS1500 Gennum Corporation, GS1500 Datasheet - Page 5

• Manufacturer Part Number: GS1500
• Description: Hd-linx (tm) THDTV Serial Digital Deformatter With Anc Fifos
• Manufacturer: Gennum Corporation

1.2 PIN DESCRIPTIONS
GENNUM CORPORATION
PIN NUMBER
13
15
16
17
18
21
22
23
26
ANC_DATA_Y
FAST_LOCK
CRC_INS
TRS_INS
LN_INS
(Continued)
(Continued)
(Continued)
(Continued)
RESET
NAME
H
V
F
Synchronous
Synchronous
Synchronous
Synchronous
Synchronous
synchronous
synchronous
synchronous
wrt PCLK_IN
synchronous
wrt PCLK_IN
wrt PCLK_IN
wrt PCLK_IN
wrt PCLK_IN
TIMING
Non-
Non-
Non-
Non-
Output
Output
Output
Output
TYPE
Input
Input
Input
Input
Input
5
Control Signal Input. Used to enable or disable re-insertion of the
TRS into the data stream. When TRS_INS is high, the device re-
inserts TRS into the incoming data stream based on the internal
calculation. The original TRS packets are set to the blanking
levels. If the flywheel is enabled, TRS calculated by the flywheel is
used for insertion. When TRS_INS is low, the device will not re-
insert TRS even if errors in TRS signals are detected.
Control Signal Input. Used to enable or disable re-insertion of the
line number into the data stream. When LN_INS is high, the device
re-inserts the line number into the incoming data stream based on
the internal calculation. The original line number packets are set to
the blanking levels. If the flywheel is enabled, the line number
calculated by the flywheel is used for insertion. When LN_INS is
low, the device will not re-insert the line number.
Control Signal Input. Used to enable or disable re-insertion of the
CRC into the data stream. When CRC_INS is high, the device is
enabled to re-insert line CRCs based on the internal calculation.
When CRC_INS is low, the device will not re-insert the CRCs.
Control Signal Input. Used to control the flywheel synchronization
when a switch line occurs. When a low to high transition occurs on
the FAST_LOCK signal, the internal flywheel will immediately re-
synchronize to the next valid EAV or SAV TRS in the incoming data
stream. See Fig. 5 for timing information.
Control Signal Input. Used to reset the system state registers to
their default 720p parameters. When RESET is high, the fly wheel,
TRS Detection, and ANC Detection operate normally. When
RESET is low, the flywheel, TRS Detection, and ANC Detection are
reset to the 720p parameters after a rising edge on PCLK_IN. The
read and write counters are not affected.
Control Signal Output. This signal indicates the Horizontal
blanking period of the video signal. Refer to Fig. 2 for timing
information of H relative to DATA_OUT[19:10] and DATA_OUT[9:0],
LUMA and CHROMA respectively.
Control Signal Output. This signal indicates the Vertical blanking
period of the video signal. Refer to Fig. 2 for timing information of
V relative to DATA_OUT[19:10] and DATA_OUT[9:0], LUMA and
CHROMA respectively.
Control Signal Output. This signal indicates the ODD/EVEN field of
the video signal. Refer to Fig. 2 for timing information of F relative
to DATA_OUT[19:10] and DATA_OUT[9:0], LUMA and CHROMA
respectively. When locked and the input signal is of a progressive
scan nature, F stays low at all times.
Control Signal Output. This signal indicates the position of the
embedded ANC data in the outgoing LUMA (DATA_OUT [19:10])
data stream. ANC_DATA_Y goes high for the entire time that an
ANC_DATA packet is present in the LUMA (DATA_OUT[19:10])
data stream whether it be in the active video area or the ANC
area. Refer to Fig. 17 for timing of ANC_DATA_Y relative to LUMA
(DATA_OUT[19:10]). During detection of ANC data, any errors in
the data count (DC) packet will consequently cause errors in the
duration of the flags. Bit errors in an ANC header will prevent the
packet from being detected.
DESCRIPTION
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