[time-nuts] Si570 question

paul swed paulswedb at gmail.com
Tue Nov 18 13:25:55 EST 2014


Clue-less.
As to the good code I have only found maybe 1 site. I thought there would
be more. I think it was hackaday.
Regards

On Tue, Nov 18, 2014 at 12:58 PM, Jim Lux <jimlux at earthlink.net> wrote:

> On 11/18/14, 8:04 AM, paul swed wrote:
>
>> I just picked up the si5351a and the thing that jumps out at mee is the
>> 228
>> registers to program.
>> Granted it lets you create just about any frequency and there is a good
>> program that tells you what to set the registers to. But 228 registers is
>> a
>> lot.
>> The traditional I2C is indeed simple. Make sure you watch the LSB order
>> and
>> setup times.
>> I see there are various ebay class boards to connect to usb for a few $
>> and
>> also boards that let you program in Windows studio as an example.
>> Or as you want to do straight out of a micro.
>>
>
> yes, there are a lot of registers, but there is some code out there to
> manage them, which I haven't actually looked at.
>
> The micro I'm using does I2C quite nicely, and I've used it for a variety
> of devices.
>
> I was wondering more about RF aspects.. How much Power supply rejection do
> these things have (yeah, the ap note shows a single bypass cap, but that
> may be "good enough to demonstrate function")... and how much harmonic
> output content is there.
>
>
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