Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter

[TheShaman]

Hey mate,

Check Ian's post here.
You only need the parts listed under the "Standard Configuration" headline (on the 3rd pic).
It's just 7 components if you exclude the headers.

[iancanada]

Originally Posted by TheShaman

Hey mate,

Check Ian's post here.
You only need the parts listed under the "Standard Configuration" headline (on the 3rd pic).
It's just 7 components if you exclude the headers.

Thakns TheShaman, but I might be a little mistake on the BOM. R10 should be 0 ohm for the standard configuration .

Originally Posted by coolhead

Ian, it Looks beautiful.
I couldn't keep up with your update, I think that is a good sign for lazy people like me to keep reading.

I received your power management board, I just want to confirm the resistors to make sure I didn't do a silly mistake:
1. R1, 2, 5, 6, 8, 10 are 0ohm
2. R11 is 100ohm
3. R3, 4, 7, 9 are 1kohm
4. R12, 13 are short because my -ve is Gnd

Thanks.

coolhead, for standard configuration,

1. R1, 8, 10 are 0ohm
2. F2 fuse or just short
3. R9 is 1kohm
4. D3 LED
5. D4 4148 or any diode for coil flayback

please refer to the below picture, just add with R10 (0 ohm)

Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter


Ian

[coolhead]

Originally Posted by iancanada

Thakns TheShaman, but I might be a little mistake on the BOM. R10 should be 0 ohm for the standard configuration .





coolhead, for standard configuration,

1. R1, 8, 10 are 0ohm
2. F2 fuse or just short
3. R9 is 1kohm
4. D3 LED
5. D4 4148 or any diode for coil flayback

please refer to the below picture, just add with R10 (0 ohm)

Asynchronous I2S FIFO project, an ultimate weapon to fight the jitter


Ian

It is much clearer now. Thanks Ian.

[hochopeper]

Ian I've had a read of the si8605 datasheet, but just want to tripple check, the si8605 could also be used to isolate a GPIO from a microcontroller using on of the unidirectional channels right? I haven't got a i2c control interface on my dac, but I do have a pin that can be pulled low to mute the dac. I am thinking that I could use Si8605 for Si570 serial and this mute pin control.

[Fridrik]

Hi! The second lot of the second group buy is almost closed and I would like to know if placing the fifo between a CS8416 and two PCM 1794A in dual mono configuration could be a problem? Ian? The PCM1794A use a standard 3 wires left jutified I2S protocole... Thanks Fred

[Fridrik]

Si570 interest list: 1. bigpandahk 2. tagheuer 3. hochopeper 4. qusp (of course) 5. AR2 - definitely! 6. wktk_smile 7. hirez69 8. CeeVee - you bet! 9. number9 10. analog_sa - GB maniac 11. edbk 12. atom6422 13. misterrogers - Of Course! 14. NicMac - as usual! 15. Zoran 16. PET-240 17. Coolhead 18. Slartibartfasst 19. SYklab 20. Regland 21. Neb001 22. SPWONG 23. Greg Stewart (also of course!) 24. Vitalica 25. spm 26. Fridrik

[qusp]

do you think we could have more of a list? what happened to the formatting? you posting from a phone or something fridrik?

fridrik, why would you use the CS8416? sure it'll work, but at the low price of the spdif module I would just recommend getting that, as a system it all works well. afaik with the latest firmware the fifo allows i2s, PCM, Left justified

I dont know the PCM1794 all that well, it depends on how its dual mono mode works, is it actually sent a discrete left and right channel i2s stream, or does it work like es9018/12 and when set to mono mode the dac is given an address to identify itself as the left or right channel, then both are sent the same stereo stream, but the left channel dac knows to use only the left channel information and vice versa for the right channel dac?

if it needs the i2s to be split into left and right mono streams then no the fifo wont work

[qusp]

Si570 interest list:

1. bigpandahk
2. tagheuer
3. hochopeper
4. qusp (of course)
5. AR2 - definitely!
6. wktk_smile
7. hirez69
8. CeeVee - you bet!
9. number9
10. analog_sa - GB maniac
11. edbk
12. atom6422
13. misterrogers - Of Course!
14. NicMac - as usual!
15. Zoran 16. PET-240
17. Coolhead
18. Slartibartfasst
19. SYklab
20. Regland
21. Neb001
22. SPWONG
23. Greg Stewart (also of course!)
24. Vitalica
25. spm
26. Fridrik

[iancanada]

Originally Posted by hochopeper

Ian I've had a read of the si8605 datasheet, but just want to tripple check, the si8605 could also be used to isolate a GPIO from a microcontroller using on of the unidirectional channels right? I haven't got a i2c control interface on my dac, but I do have a pin that can be pulled low to mute the dac. I am thinking that I could use Si8605 for Si570 serial and this mute pin control.

Yes, correct. Si86056 has both I2C isolator and GPIO isolator. The GPIO is bidirectional. So, it's very easy use for serial communication port (USART, or LVTTL RS232).

Ian

[Fridrik]

Originally Posted by qusp

do you think we could have more of a list? what happened to the formatting? you posting from a phone or something fridrik?

fridrik, why would you use the CS8416? sure it'll work, but at the low price of the spdif module I would just recommend getting that, as a system it all works well. afaik with the latest firmware the fifo allows i2s, PCM, Left justified

I dont know the PCM1794 all that well, it depends on how its dual mono mode works, is it actually sent a discrete left and right channel i2s stream, or does it work like es9018/12 and when set to mono mode the dac is given an address to identify itself as the left or right channel, then both are sent the same stereo stream, but the left channel dac knows to use only the left channel information and vice versa for the right channel dac?

if it needs the i2s to be split into left and right mono streams then no the fifo wont work

Formating was removed because au noscript in firefox...

Yes your first decription is rigth the I2S signals are connected strait from the CS8416 output to the 2 PCM1794 (left and right ) inputs.

The only two problem I could see are :

1- Is the fifo output able to drive 2 inputs ( probably)
2- The protocol configuration of the PCM1794 : I2S or standard 24 bit right justified