GS2960A Datasheet, PDF (71/99 Pages) Gennum Corporation – Ancillary data extraction

Application Layer
Read Pointer
Bank A
0 ANCDATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
Internal Write
800h Pointer
Bank B
0
800h
1023
BFFh
1023
BFFh
ANC_DATA_SWITCH = HIGH
Figure 4-32: Ancillary Data Extraction - Step B
To read the new data, toggle the ANC_DATA_SWITCH bit LOW. The old data in Bank A
is cleared to zero and extraction continues in Bank B (see Figure 4-33: Ancillary Data
Extraction - Step C).
Bank A
0
Application Layer
Read Pointer
800h
0
Internal Write
Pointer
Bank B
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
ANC DATA
800h
1023
BFFh
1023
BFFh
ANC_DATA_SWITCH = LOW
Figure 4-33: Ancillary Data Extraction - Step C
GS2960A 3Gb/s, HD, SD SDI Receiver
Data Sheet
54384 - 2
September 2012
71 of 99