Hello,
From MKW01xx Reference Manual, Rev. 2:
4.4.1 Additional Transceiver Status Signals
The MKW01Z128 transceiver has a total of six outputs (DIO5:DIO0) that can be programmed as status indicators:
Does it mean use of LLWU (i.e.SyncAddress, CrcOk,... ) on PTC4, PTC3 to wake up sleeping MCU when transceiver do radio RX duty cycling or anything else ?
Thanks,
Pavel
Hello Pavel:
I don't know the meaning of that "improved performance", but yes, I suppose you could use those flags (SyncAddress, CrcOk, FifoFull, FifoNotEmpty, etc) as wake-up sources, as long as you configure properly the LLWU unit of the internal MCU.
Now, as for why it says specifically PTC3 and PTC4, I think this is because of the connections in the Modular Reference Boards (MRB-KW0x: Modular Reference Boards for Kinetis KW0x Family of MCUs). Check this:
Regards!
Jorge Gonzalez
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
It mean that if you want to use DIO1 and DIO0 in enhanced mode, you should route these signals to PTC4 & PTC3 pins, instead use them on default pins (PTE3 & PTE2).
The reason for this is explained on 8.1 LGA Package Maximum Ratings in the datasheet MKW01Z128:
This device contains circuitry protecting against damage due to high static voltage or electrical fields;
however, it is advised that normal precautions be taken to avoid application of any voltages higher than
maximum-rated voltages to this high-impedance circuit. Reliability of operation is enhanced if unused
inputs are tied to an appropriate logic voltage level (for instance, either VSS or VDD) or the programmable
pull-up resistor associated with the pin is enabled.
Have a nice day :P,
Perla
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------
Hi,
thank you for clarification, yet it is still unclear to me, why I have to route them specifically to PTC4 and PTC3 (or why not just pull them up/down internally on PTE).
Thanks,
Pavel