Ccap; Figure 111: Cgms (525I) Waveform - Analog Devices Advantiv ADV7604 Hardware Manual

11.11.3 CCAP

Two bytes of decoded closed caption data are available in the I
the decoded CCAP data can be obtained from the CC_EVEN_FIELD bit.
STATUS_CLEAR_CCAP , VDP Map, Address 0x78, [0], Write only
Function
STATUS_CLEAR_CCAP
0
1
STATUS_CCAP , VDP Map, Address 0x40, [0], Read only
Function
STATUS_CCAP
0
1
STATUS_CCAP_EVEN_FIELD , VDP Map, Address 0x40, [1], Read only
The STATUS_CCAP_EVEN_FIELD identifies the field from which the CCAP data was decoded.
Function
STATUS_CCAP_EVEN_FI
ELD
0
1
VDP_CCAP_DATA_1 VDP Closed Caption Readback 1 , VDP Map, Address 0x41, [7:0], Read
only
Function
VDP_CCAP_DATA_1
xxxx xxxx
0x41[7:0]
Rev. F August 2010

Figure 111: CGMS (525i) Waveform

Description
Not necessary to write 0 since STATUS_CLEAR_CCAP is a self
clearing bit
Refreshes the CCAP readback registers
Description
Closed captioning not detected
Closed captioning detected
Description
Closed captioning on odd field
Closed captioning on even field
Description
Decoded byte 0 of CCAP data[7:0]
VDP_CCAP_DATA[7:0]
345
2
C registers. The field information of
ADV7604