Other Parts Discussed in Thread: ADC12DJ5200RF
1. Regarding the synchronization of NCO between devices of ads54j64,
is it synchronized at the rising edge of the SYNB input signal?
The data sheet did not specifically describe the NCO synchronization method.
Disable SYSREF when the input of SYSREF is set to Disable SYSREF
after initializing two ads54j64 including NCO There is almost no change in
the phase difference of the signal between the two devices acquired by JESD204B
after inputting with or without input. was.
Another TI ADC12DJ5200RF has a setting such as NCO SYNC ILA as the initial
value of Fig7-89.NCO SYNC REGISTER.
There was a description and it was the default to synchronize at the startup
of SYNB. Just tell me if ADS54J64 has the same mechanism
I would appreciate it. (Is there a register whose function is not disclosed?)
2. The NCO register of ads54j64 is described as Fig 122 REG 7Ah NCO WORD [15: 8] / Fig 123 REG 7Bh NCO WORD [7: 0].
There was, but isn't the address of the upper and lower registers opposite?
Manual settings on the actual device Then, the frequency was set unintentionally.
The frequency setting was intended when the following settings were made.
When the frequency reaches the intended frequency
Set lower NCO WORD [7: 0] in REG 7Ah NCO WORD [15: 8]
Set the upper NCO WORD [15: 8] in REG 7Bh NCO WORD [7: 0]
