GS2961A Datasheet, PDF (59/104 Pages) Gennum Corporation – Ancillary data extraction

4.13.1 2K Support
In order to fully support 2K standards without customer intervention, Semtech provides
FPGA code for enhancing the GS2961A's 2K capability.
The features of the 2K FPGA enhancement are:
• Automatic video standard detection for 2K standards
• 1/1.001 rate detection for 2K standards
• CEA-861 timing generation for 2K standards
• Automatic enabling of audio extraction
This enhancement is an interface between the GS2961A and the customer system. The
behaviour of the GS2961A with or without the additional 2K enhancement FPGA code
is identical from a user-perspective.
GS2961A
Level_B
FPGA
GIb_MUX
PLL
÷1
÷2
0
1
GIb_Buf
Pclk_div2
Pclk
GS2961A_GSPI_SDI
Host_GSPI_CS
GS2961A_GSPI_CS
Host_GSPI_SCLK
GS2961A_GSPI_SCLK
Host_GSPI_SDI
GS2961A_GSPI_SDOUT
Host_GSPI_SDOUT
STAT3
Host_GSPI_busy
STAT4
Level_B
STAT5
clk_27M_ref
WO_2K
rate_m_o
std_2K_det_o
reset
dy_out_o[9:0]
smpte_bypass_i
dc_out_o[9:0]
tim_861
fvh_o[2:0]
dy_in_i[9:0]
dc_in_i[9:0]
fvh_i[2:0]
Level_B
Host
Interface
Control
Vid_Out[19:0]
HVF[2:0]
Figure 4-30:2K Feature Enhancement
GS2961A 3Gb/s, HD, SD SDI Integrated Receiver
Data Sheet
54385 - 2
September 2012
59 of 104