Vitc Readback Registers; Figure 109: Ccap Waveform And Decoded Data Correlation - Analog Devices ADV7850 Hardware Manual

vdp_status_ccap, Addr 48 (VDP), Address 0x40[0] (Read Only)
This readback displays the closed caption data detection status.
Function
vdp_status_ccap
0 
1
vdp_status_ccap_even_field, Addr 48 (VDP), Address 0x40[1] (Read Only)
This readback displays the closed caption data in the even field status.
Function
vdp_status_ccap_even_
field
0 
1
vdp_ccap_data[15:8], Addr 48 (VDP), Address 0x42[7:0] (Read Only)
This readback displays byte 2 of the decoded closed caption data.
Function
vdp_ccap_data[15:8]
xxxxxxxx

VITC Readback Registers

10.3.4
The decoded VITC data bytes are available in the vdp_vitc_data registers (refer to
decoded data bytes and is made available in the vdp_vitc_calc_crc control.
Rev. A May 2012
Description
Closed caption data not detected
Closed caption data detected
Description
Closed caption data not detected in even field
Closed caption data detected in even field
Description
Byte 2 of decoded closed caption data

Figure 109: CCAP Waveform and Decoded Data Correlation

Table 66). The VDP also calculates a CRC for the
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ADV7850