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ADS54J42: NYQUIST ZONE & CTRL NYQUIST Register setting
Part Number: ADS54J42
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My customer set the nyquist zone as follows.
0x680042 0x01 //2nd Nyquist zone select or 0x00 // 1st Nyquist zone select0x68004E 0x80 //nyquist enable0x680000 0x01 // reset digital. Must issue after writes to 6800h0x680000 0x00 // clear reset
In this case, how long does it take to become operational after setting that setting ?
This is the information needed to design their software.
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It is better if the Nyquist-zone configuration is added as part of the bring-up configuration, where it is added just before issuing the digital-core-reset. This way no extra wait time is needed.
Changing the setting after the device bring-up will reset the Interleave engine, which then you will have to wait for it to converge, which will take about 150ms.
In reply to jim s:
Thank you for your clear comments.
OK, I understood your all comments.
I have an additional question.
[Q]Is there an appropriate order below ?
0x680042 0x01 //2nd Nyquist zone select or 0x00 // 1st Nyquist zone select0x68004E 0x80 //nyquist enable
In reply to Hiroshi Katsunaga:
The order does not matter. None of these settings go into effect until a pulse reset occurs in page 6800h address 0h bit 0.
Thank you for your clear comment.
OK, I understand it.
Thank you for your cooperation.
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