ADV8003 Hardware Manual
Rev. B, August 2013
264
channel 0 left position, I2S3 right channel in channel 3 right position, and so on) but this mapping is completely programmable if desired.
The ADV8003 can receive standard I2S, left-justified, right-justified, and direct AES3 stream formats with a sample word width between
16 bits and 24 bits. The format of the input I2S stream is set via
while the audio sample word width is set via the
field. The ADV8003 can also receive an I2S stream in both 64-bit and 32-bit modes, so either 32- or 16-bit clock (that is,
the signal input through SCLK pin) edges or cycles per channel are valid. The ADV8003 will adapt to 32- or 64-bit modes automatically,
and the current mode can be read in the
field. Refer to
for timing diagrams on I2S streams input to
the ADV8003.
When the ADV8003 is configured to receive a direct AES3 stream, the stream it receives should have IEC60958-like subframes (refer to
) with the stream formatted as follows:
•
Data should be aligned as shown in
•
Preamble left out as shown in
•
Parity bit is replaced by the block start flag. The ADV8003 automatically computes the parity bit.
The channel status data collected from the audio stream input to the AUD_IN[0] pin is used in the Audio Sample packets sent by the
ADV8003 to the downstream sink. The channel status data can alternately be programmed by setting the
allows the programming of the audio sampling frequency used for the channel
status bits while all other channel status data is extracted from the audio stream input to I2S0. The sampling frequency is set via the
field.
Note:
All four stereo channels (AUD_IN[3:0]) are enabled by setting
to 0x7. If one stereo channel
only is needed, the I2S audio stream data must be input to AUD_IN[0]. The
and
control fields must be set to 1.
is set to 1, the audio sampling frequency programmed via I2S_SF is used for the determination of the
pixel repetition factor (refer to Section
for more details).
audioif_sf[2:0]
, TX2 Main Map,
Address 0xF474[4:2]
This signal is used to specify the Audio Sampling Frequency in the Audio InfoFrame.
000 = Case 1: Not DSD audio (Audio Select register bits 0x0A[64]
≠
0b010) or Case 2: DSD audio (Audio Select register bits 0x0A[6:4]
= 0b010)
001 = 64x32kHz
010 = 64x44.1kHz
011 = 64x48kHz
100 = 64x88.2kHz
101 = 64x96kHz
110 = 64x176.4kHz
111 = 64x192kHz
Function
audioif_sf[2:0]
Description
000
See description
001
See description
010
See description
011
See description
100
See description
101
See description
110
See description
111
See description
audioif_cc[2:0]
, TX2 Main Map,
Address 0xF473[2:0]
This signal is used to set the Audio Channel Count (Audio InfoFrame).
Summary of Contents for ADV8003
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