Other Parts Discussed in Thread: TAD5212, PCM9211
Evaluating the TAD5212 on TAx512EVM-K evaluation module (with AC-MB) I have trouble to get TOSLINK (optical) input working (from host to eval board).
I get just one channel from AC-MB (U11, PCM9211). The right channel data (FS=1) is always 0!
WHY?
I tried to "debug" the PCM9211 registers. I do not see anything wrong (all running in reset default mode, 48KHz, 24bit, I2S). Also trying some register config changes - ALWAYS just one channel.
Also using other formats on my TOSLINK Tx+Rx (UCSTR-B3) - the same.
The XMOS chip (on AC-MB) does not configure any register in PCM9211 (all as default, 48KHz, 24bit, with a 32bit frame).
BTW (for other users):
The AC-MB, U11, PCM9211, has the I2C address 0x80, e.g.:
r 80 38 01
gives me correct 48KHz (default) Fs.
Checking the I2S signals shows me: there is never data on one channel.
(TOSLINK out, PDM MICs to host PC via TOSLINK, works fine).
BTW: it is related to the PCM9211 chip on MC-AB, not the TAD5212 itself.
What is this?
FYI: my TAD5212 I2C config script (but not the root cause)
#Dual DAC config, single-ended out plus both PDM MICs
# Select page 0
w a0 00 00
w a0 01 01
w a0 7f 00
w a0 00 00
w a0 02 09
w a0 0a 41
w a0 0d 02
w a0 0e 02
w a0 0f 14
w a0 10 51
w a0 13 cc
w a0 1a 70 #I2S, 32bit
w a0 1e 20
w a0 1f 21
w a0 20 20
w a0 21 21
w a0 26 00 #bit offset = 0
w a0 27 0c
w a0 2a 20
w a0 2b 21
w a0 32 50
w a0 52 f4
w a0 57 f4
w a0 64 24
w a0 65 61
w a0 66 60
w a0 6b 24
w a0 6c 61
w a0 6d 60
w a0 73 08
w a0 76 cf
# Select page 3
w a0 00 03
w a0 32 80
w a0 34 90
w a0 38 09
w a0 39 28
w a0 3a 26
w a0 3b 20
w a0 3c 00
w a0 3d 00
w a0 3e 09
w a0 48 01
w a0 49 01
# Select page 10
w a0 00 0a
w a0 79 fd
w a0 7a db
w a0 7b 01
w a0 7c 80
w a0 7d 02
w a0 7e 24
w a0 7f ff
# Select page 11
w a0 00 0b
w a0 08 7f
w a0 09 fb
w a0 0a b6
w a0 0b 01
# Select page 25
w a0 00 19
w a0 6c 7f
w a0 6d fb
w a0 6e 00
w a0 6f 0f
# Select page 26
w a0 00 1a
w a0 40 00
w a0 41 0a
w a0 42 5c
w a0 43 b6
w a0 44 e0
w a0 45 00
w a0 46 00
w a0 47 00
# Select page 27
w a0 00 1b
w a0 64 e0
w a0 66 00
w a0 67 08
w a0 78 e0
w a0 7a 00
w a0 7b 05
# Select page 28
w a0 00 1c
w a0 24 0c
w a0 25 cc
w a0 26 cc
w a0 27 cc
w a0 28 7f
w a0 29 ff
w a0 2a ff
w a0 2b ff
w a0 50 08
w a0 51 ff
w a0 52 03
w a0 53 c0
# Select page 0
w a0 00 00
w a0 78 c0
r 80 38 01 #read PCM9211 register (get Fs recognized)
r 80 38 01
