Analog Devices ADV8003, Руководство по оборудованию

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ADV8003 Hardware Manual
Rev. B, August 2013 271
Function
spdif_sf[3:0] Description
0000  44.1kHz
0001 NA
0010 48 kHz
0011 32kHz
0100 NA
0101 NA
0110 NA
0111 NA
1000 88.2kHz
1001 NA
1010 96kHz
1011 NA
1100 176.4kHz
1101 NA
1110 192kHz
1111 NA
6.11.2.3. DSD Audio
The ADV8003 uses 1-bit Audio Sample packets to transmit DSD audio data across the HDMI link to the downstream sink. The ADV8003
supports up to six channels of DSD data which can be input onto six data lines clocked by the signal input to DSD_CLK.
The ADV8003 can be configured to receive a DSD stream by setting
audio_input_sel[2:0] to 0b010. The mode of the DSD stream input to
the ADV8003 can be set via the audio_mode[1:0] field. The audio sampling frequency must be set via the audioif_sf[2:0] field. Note the
DSD clock input to SCLK has a frequency that is 64 times the audio sampling frequency programmed in the audioif_sf[2:0] field.
Refer to
Table 60 for additional details on the DSD modes supported by the ADV8003.
Table 61: Valid Configuration for audioif_sf[2:0] Address B8 (Main), Address 0x74[4:2]
audio_input_sel Value audioif_sf Value Options Corresponding Configuration
≠0b010
0b000 Not DSD Audio
0b011
0b001 DSD Audio, 64x32 kHz
0b010 DSD Audio, 64x44.1 kHz
0b011 DSD Audio, 64x48 kHz
0b100 DSD Audio, 64x88.2 kHz
0b101 DSD Audio, 64x96 kHz
0b110 DSD Audio, 64x176.4 kHz
0b111 DSD Audio, 64x192 kHz
6.11.2.4. HBR Audio
The ADV8003 uses an HBR audio packet to transmit across the TMDS link compressed audio streams conforming to IEC 61937 and with
high bit rate (that is, bit rate higher than 6.144 Mbps).
The ADV8003 can be configured to receive an HBR stream by setting
audio_input_sel[2:0] to 0b011. The use of one or four input
stream(s) with or without biphase mark (BPM) encoding can be selected via the audio_mode[1:0] field. Note that an audio master clock
input through the pin MCLK_IN is always required for the BPM encoding modes. For HBR mode, the audio sampling frequency must be
set via the
audioif_sf[2:0] field.
papb_sync can be toggled from 0 to 1 to synchronize the Pa and Pb syncword, which marks the beginning of a stream repetition with the
subpacket 0. For data bursts with a repetition period, which is a multiple of four frames, the synchronization will persist. If the data burst
does not have a repetition period of four frames, setting papb_sync is not needed but will not have any negative effects. The transition of
the bit from 0 to 1 causes the one time synchronization, so setting the bit from 1 to 0 will have no effect.