Cirrus Logic CS8420 - Manual (Page 35)

DS245F4 35
CS8420
10.3 Miscellaneous Control 2 (02h)
TRUNC Determines whether the word length is set according to the incoming Channel Status data
0 - Data to the SRC is not truncated (default)
1 - Data to the SRC is set according to the AUX field in the incoming data stream
HOLD[1:0] The HOLD bits determine how the received audio sample is affected when a receiver
error occurs.
00 - Hold the last valid audio sample (default)
01 - Replace the current audio sample with 00 (mute)
10 - Do not change the received audio sample
11 - Reserved
RMCKF Select recovered master clock output pin frequency.
0 - RMCK is equal to 256 * Fsi (default)
1 - RMCK is equal to 128 * Fsi
MMR Select AES3 receiver mono or stereo operation
0 - Interpret A and B subframes as two independent channels (normal stereo operation, default)
1 - Interpret A and B subframes as consecutive samples of one channel of data.This data is
duplicated to both left and right parallel outputs of the AES receiver block. The input sample
rate (Fsi) is doubled compared to MMR=0
MMT Select AES3 transmitter mono or stereo operation
0 - Outputs left channel input into A subframe and right channel input into B subframe (normal
stereo operation, default).
1 - Output either left or right channel inputs into consecutive subframe outputs (mono mode, left
or right is determined by MMTLR bit)
MMTCS Select A or B channel status data to transmit in mono mode
0 - Use channel A CS data for the A sub-frame slot and use channel B CS data for the B sub-
frame slot (default)
1 - Use the same CS data for both the A and B sub-frame output slots. If MMTLR = 0, use the
left channel CS data. If MMTLR = 1, use the right channel CS data.
MMTLR Channel Selection for AES Transmitter mono mode
0 - Use left channel input data for consecutive sub-frame outputs (default)
1 - Use right channel input data for consecutive sub-frame outputs
7 6 5 4 3 2 1 0
TRUNC HOLD1 HOLD0 RMCKF MMR MMT MMTCS MMTLR