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New? Sure Electronics ADAU1701 Module
New? Sure Electronics ADAU1701 Module
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Old 19th August 2017, 11:34 AM   #121
Neil Davis is offline Neil Davis  United States
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New? Sure Electronics ADAU1701 Module
Quote:
Originally Posted by PloppyThirds View Post
The module I just received from the sure-electronics webstore had a 12.288 mhz crystal.
The Sure amplifier/DSP board, the JAB3 series, also uses the 12.288MHz crystal.
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Old 30th August 2017, 04:04 PM   #122
PloppyThirds is offline PloppyThirds
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I just received contact from Lillian at Sure Electronics/WondoM. She provided PDF's which are a bit more useful than the webstore documentation, especially on what "in circuit programmer" entails.
Sure Electronics ADAU1701 (AA-AP23122) documentation - Album on Imgur

Does anyone know if there's circuitry between the pcb mclk pin (J4 header pin 1) and the adau's mclki pin, or if the on-board crystal circuit will interfere with an external signal applied if I disable the oscillator via register? On the converse has anyone tried using the mp11 pin to feed the internal mclk to other devices per the adau1701 datasheet page 18? I believe in master output mode setting reg 2078 obf bits to 10 should produce a 256xfs signal, at the sacrifice of digital output.
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Old 21st September 2017, 07:59 PM   #123
ernperkins is offline ernperkins  United States
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Quote:
Originally Posted by Kay View Post
I try to paint the circuit
Thanks for providing that! I had a dead board at hand so I removed and measured some of the components labeled with question marks:

C30, C31, C32 & C33 - measured between 2.2 and 2.3 uF

C3, C11, C28 & C34 - measured 500 pF

C2 & C6 - measured 2.4 uF

RV1, RV4, RV5 & RV6 - I believe these are varistors: they basically measure infinite resistance until a certain voltage and then "break down" for transient protection. I'm not familiar with how to characterize their parameters and couldn't make out the chip markings. In any case I think they can be ignored under normal operating conditions.
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Old 21st September 2017, 10:52 PM   #124
Kay is offline Kay  Germany
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Thanks for the informations!
now I have a dead board too
(new version with 12M288Hz and power LED)
If I find the time, I try to complete my drawing.
__________________
best regards
Kay
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Old 16th October 2017, 01:23 AM   #125
aselle is offline aselle
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Default Adau1701 Sure

I just received 3 boards from Sure. Specifically the ADAU1701 main board, the interface extension kit and the freeusbi programmer kit (cyprus board + freeusbi derived board). After a lot of tinkering I was able to get it to work, but it is a little bit inconvenient.

1. If I try to start with the freeusbi stack plugged into the adau1701 board, it doesn't detect the usb properly (it shows up as an unknown device). (The i2c light on the freeusbi is not lit)

2. If I follow this specific procedure it works

a. Unplug the 6 pin molex that connects the freeusb to the adau1701 board.
b. Power on both boards independently (i get a lit green light for i2c line on the freeusbi)
c. At this point windows 10 detects the freeusbi driver properly
d. Plug in the 6 pin molex (while the boards are running) between the two boards
e. Use sigmastudio and it works fine. (Well it's a little tricky to test, because I don't have the interface board, but I can make signal soiurces in sigma studio and see the proper waveform on my oscilloscope)

3. The interface board I got seems just broken. I can't the system to program when that is plugged. I haven't had a chance to try to test it in isolation to see if it has a short that is causing the rest of the system to misbehave.

Curious if anybody else is hitting this. This is making me inclined to try to talk to the adau1701 board direcly over i2c from a 3.3v arduino or something and statically copy sigmastudio programs.
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Old 16th October 2017, 01:22 PM   #126
Neil Davis is offline Neil Davis  United States
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New? Sure Electronics ADAU1701 Module
Quote:
Originally Posted by aselle View Post
This is making me inclined to try to talk to the adau1701 board direcly over i2c from a 3.3v arduino or something and statically copy sigmastudio programs.
That works fine. The SigmaStudio compiler outputs a ".h" file that can be compiled with the Arduino code. However, you will need to extend the I2C routines in Wire.h because they don't know how to deal with the 16-bit I2C sub-addresses used in the ADAU1701. This is discussed in detail in Article #5 at Audiodevelopers.com.
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Old 3rd November 2017, 10:52 AM   #127
Rron is offline Rron
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Could I ask what is probably a stupid question about the 12 MHz crystal on the sure board?

Does this cause any significant problems?

I thought the AD Data sheet specified a 12.228 MHz crystal as the only frequency crystal that is supposed to be used.
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Old 15th November 2017, 01:42 AM   #128
Rron is offline Rron
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Whoops my bad. Should have read the earlier post more thoroughly and noticed that the sure board now uses the appropriate crystal.
Apologies.
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Old 15th November 2017, 03:39 PM   #129
Neil Davis is offline Neil Davis  United States
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New? Sure Electronics ADAU1701 Module
That's one of the challenges of these low-cost boards--they don't publish revision data so you don't always know what you are going to get. The 12MHz crystal is just weird--it probably won't cause any problems because it is not that far off from the specified value. But there may be some applications where it is a problem--depends on how you intend to use the board. I assume that all of the newer boards use the 12.228MHz crystal, but only Sure knows for sure.
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Old 15th November 2017, 03:44 PM   #130
doctormord is offline doctormord  Germany
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I always used a 24.576MHz in my designs.
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