Hello again,
there are another two pins for the SM1000 that I wanted to know more about.
The Test pin connects to a Self-Test circuit. What exactly is this used to
test for please?
Also there is another pin named CPPT that connects to an optoisolator. I
understand that the CPPT signal is used to trigger the PTT for the radio
but why is the opto-isolator implemented please?
Thank you very much for your attention.
Kindest regards,
On Sat, Feb 24, 2018 at 9:01 PM, Jacob Falzon <[email protected]>
wrote:
> Thank you very much for your attention.
>
> Have a good night!
>
> On 24 Feb 2018 8:26 PM, "David Rowe" <[email protected]> wrote:
>
>> Hi Jacob,
>>
>> These pins are just broken out as GPIOs or for future expansion.
>>
>> - David
>>
>> On 25/02/18 00:54, Jacob Falzon wrote:
>>
>>> Hi there,
>>>
>>> i was looking at the schematic and I came upon the SPI pins and the UART
>>> pins in the schematic.
>>>
>>> The SPI pins ( SCK, MOSI, MISO, NSS) do not seem to be connected with an
>>> external component. What is their purpose?
>>>
>>> Also the UART pins whilst available are they currently utilised for some
>>> purpose?
>>>
>>> Many thanks for your kind attention.
>>>
>>> Regards,
>>>
>>>
>>>
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