GS2970A Datasheet, PDF (77/150 Pages) Gennum Corporation – Integrated audio clock generator

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).
GS2970A 3Gb/s, HD, SD SDI Receiver
Data Sheet
54244 - 2
September 2012
77 of 150