GV7704 Datasheet, PDF (25/52 Pages) Semtech Corporation – Quad HD-VLC Receiver

Table 4-7: Digital Output Specifications
Digital Parallel Video
Output Interface
Symbol Conditions
Parallel Clock Frequency
Parallel Clock Duty Cycle
Output Data Hold Time (HD)
Output Data Delay Time (HD)
Output Data Rise/Fall Time (HD)
f_PCLK
DC_PCLK
t_OH
t_OD
t_r/t_f
—
—
1.89V operation,
6pF C_LOAD, 0°C
1.71V operation,
6pF C_LOAD, 85°C
1.89V operation,
6 pF C_LOAD, 0°C
1.71V operation,
15 pF C_LOAD, 85°C
Min
Typ
Max Units Notes
—
148.5
—
MHz
—
40
—
60
%
1.0
—
—
ns
—
—
—
3.7
ns
—
—
—
0.4
ns
—
—
—
1.4
ns
—
4.6 Stream ID Packet Extraction
The GV7704 will automatically detect and extract HDcctv Stream ID packets from all four
video channels. Each channel’s 6 byte packet can be read from the host interface
through the bits EXTRACT_STREAM_ID_BYTE[1:6] located in registers
EXTRACT_STREAM_ID_REG[1:6] respectively. There are independent registers for each
of the four channels.
When the GV7704 is decoding HD-VLC streams, the device will automatically re-insert
the correct Stream ID in the HD parallel video output. Only bytes 1 and 2 of the Stream
ID packet will be updated, with all other bytes set to all zero. The re-inserted byte 1 and
2 data can be read from registers INS_ID_BYTE1_REG and INS_ID_BYTE_2_REG. Bytes 1
and 2 can be programmed from bits INS_ID_BYTE[1:2] located in registers
INS_ID_BYTE_REG[1:2] respectively.
Byte 1 of the Stream ID packet is interpreted according to Table 4-8 below.
Table 4-8: Stream ID Packet Extraction Byte 1
Input Video
Standard
720p25
625i25
720p29.97
525i29.97
720p30
525i30
1080i50
HD-VLC Encoding
OFF
ON
OFF
ON
OFF
ON
OFF
Byte 1 Value
14h
94h
12h
92h
11h
91h
E3h
Original Video
Standard
720p25
720p25
720p29.97
720p29.97
720p30
720p30
1080i50
GV7704
Preliminary Data Sheet Rev.3
PDS-060376
September 2015
www.semtech.com
25 of 52
Semtech