I'm trying to make sense of the settings of the dit4192 in hardware mode. Some stuff I get, some I don't. A search through the forum doesn't bring many definitive solutions. If someone with some experience of the IC had some ideas, I'd gladly get some suggestions. It will be used to connect an adc to a minidsp ministreamer.
The datasheet is here: http://www.ti.com/lit/ds/symlink/dit4192.pdf
So, pin by pin, with the problematic ones highlighted...
* pin 1 - CSS=0 : set to 0 to keep things simple
* pin 2 - Copy=? and pin 3 - L=? : not very clear. Here's the table given in the datasheet:
copy=0, L=0 - Consumer Mode, PRO = 0, COPY = 0, L = 0
copy=0, L=1 - Consumer Mode, PRO = 0, COPY = 0, L = 1
copy=1, L=0 - Consumer Mode, PRO = 0, COPY = 1, L = 0
copy=1, L=1 - Professional Mode, PRO = 1, No Copy Protection
Not exactly crystal clear what I should use.
* pin 4 - clk1=0 and pin 5 - clk0=1 : that's easier, that gives me the 256fs I want.
* pin 6 - mclk: the master clock input, ok
* pin 7 - vio: obvious too
* pin 8 - dgnd : ok
* pin 9 - fmt0=1 and pin 10 - fmt1=0: that gives me the 24bit i2s I need.
* pin 11 - sclk : is connected to the adc bck
* pin 12 - sync : is connected to the adc lrck
* pin 13 - sdata : is connected to the adc data line
* pin 14 - M/S=1 : is set high to put the dit4192 in master mode (the adc being slave)
* pin 15 - rst : the usual stuff, should be kept low at start
* pin 16 - dgnd : ok
* pin 17 - tx- and pin 18 - tx+ : obvious stuff again
* pin 19 - vdd : ok
* pin 20 - mdat=? : not of interest to me as I won't be using the dit4192 in mono mode. But what should I do with it? Keep it low, high, open ?
* pin 21- mono=0 : should be kept low to have the dit4192 in stereo mode
* pin 22 - audio=0 : should be kept low to signal Digital (or Linear PCM) Audio Data
* pin 23 - emph=1 : tell the dit4192 preemphasis has been applied (0) or not (1)
* pin 24 - blsm=? : defines if the bls pin is input (0) or output (1). As I've no idea what to do with bls, I've no idea what to do with that one.
* pin 25 - bls, pin 26 - V, pin 27 - U : I've read the datasheet a few times and I still can't make sense of it. Any suggestion would be welcome here.
* pin 28 - mode=1: for hardware mode
Thanks in advance for any help. 🙂
The datasheet is here: http://www.ti.com/lit/ds/symlink/dit4192.pdf
So, pin by pin, with the problematic ones highlighted...
* pin 1 - CSS=0 : set to 0 to keep things simple
* pin 2 - Copy=? and pin 3 - L=? : not very clear. Here's the table given in the datasheet:
copy=0, L=0 - Consumer Mode, PRO = 0, COPY = 0, L = 0
copy=0, L=1 - Consumer Mode, PRO = 0, COPY = 0, L = 1
copy=1, L=0 - Consumer Mode, PRO = 0, COPY = 1, L = 0
copy=1, L=1 - Professional Mode, PRO = 1, No Copy Protection
Not exactly crystal clear what I should use.
* pin 4 - clk1=0 and pin 5 - clk0=1 : that's easier, that gives me the 256fs I want.
* pin 6 - mclk: the master clock input, ok
* pin 7 - vio: obvious too
* pin 8 - dgnd : ok
* pin 9 - fmt0=1 and pin 10 - fmt1=0: that gives me the 24bit i2s I need.
* pin 11 - sclk : is connected to the adc bck
* pin 12 - sync : is connected to the adc lrck
* pin 13 - sdata : is connected to the adc data line
* pin 14 - M/S=1 : is set high to put the dit4192 in master mode (the adc being slave)
* pin 15 - rst : the usual stuff, should be kept low at start
* pin 16 - dgnd : ok
* pin 17 - tx- and pin 18 - tx+ : obvious stuff again
* pin 19 - vdd : ok
* pin 20 - mdat=? : not of interest to me as I won't be using the dit4192 in mono mode. But what should I do with it? Keep it low, high, open ?
* pin 21- mono=0 : should be kept low to have the dit4192 in stereo mode
* pin 22 - audio=0 : should be kept low to signal Digital (or Linear PCM) Audio Data
* pin 23 - emph=1 : tell the dit4192 preemphasis has been applied (0) or not (1)
* pin 24 - blsm=? : defines if the bls pin is input (0) or output (1). As I've no idea what to do with bls, I've no idea what to do with that one.
* pin 25 - bls, pin 26 - V, pin 27 - U : I've read the datasheet a few times and I still can't make sense of it. Any suggestion would be welcome here.
* pin 28 - mode=1: for hardware mode
Thanks in advance for any help. 🙂
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Doing some homework... The dit4192 is used in the pcm4222 evm. And the similar dit4096 in the pcm4201evm.
In both evm, they set BLSM high, let BLS open and tie U and V to gnd. Copy and L are both high, in pro mode thus.
In the pcm4201evm where the dit4096 is in stereo mode (mono in the pcm4222evm), mdat is tied to gnd along with mono.
That only leaves pins 2 and 3 unclear. They'll get headers so I can experiment.
In both evm, they set BLSM high, let BLS open and tie U and V to gnd. Copy and L are both high, in pro mode thus.
In the pcm4201evm where the dit4096 is in stereo mode (mono in the pcm4222evm), mdat is tied to gnd along with mono.
That only leaves pins 2 and 3 unclear. They'll get headers so I can experiment.
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