NCN511010GEVB, NCN512010GEVB, NCN512110GEVB, NCN513010GEVB
www.onsemi.com
8
FAQ
1. Is this development board KNX Certified?
No, only the transceiver is KNX Certified. The
development board may only be used for evaluation of the
transceiver. It is not allowed to use the development board
in a final product or to sell it as a KNX Certified product.
Contact ON Semiconductor if you want to use the
development board as a final product.
2. What 3rd party companies do you recommend for the
higher layer stacks?
ON Semiconductor does not recommend any 3
rd
party
company in particular. Several 3
rd party companies have
KNX Certified stacks and it’s always advised to use one of
these stacks. Some companies have experience with ON
Semiconductor KNX transceivers. Contact ON
Semiconductor for more information.
3. Can we freely reuse the schematic and layout of this
development board?
It is allowed to reuse the schematic, components and
layout of the evaluation board for your own application.
Because the operating conditions of your design are not
known by ON Semiconductor, one must always fully verify
the design even if it’s based on this evaluation board. Contact
ON Semiconductor if additional information is required.
4. Can we request ON Semiconductor to supply the higher
layer stacks?
By no means will ON Semiconductor provide any higher
layer stacks. Certified higher layer stacks can be provided by
3
rd party companies.
5. How much load can the outputs drive?
The maximum allow load can be calculated with the
formula as given in Adjustable DC−DC Converter (page
x13). I
DD2 defines the maximum load the outputs can drive
in total.
6. Is it possible to test all interfaces (UART, SPI, Analog
Mode) with this evaluation board?
Yes, the board can be used with all possible interfaces.
One has to be careful however when using the Analog Mode.
In the Analog Mode the digital of NCN5120 is bypassed. If
the microcontroller would force the RXD*pin (pin 29)
high, the transceiver would pull the KNX bus low
continuously, which could lead to issues.
7. I’m having issues with the voltage regulators whenever
I’m going above a certain current. What could be the issue?
To be able to take more than 13 mA from the KNX bus one
needs to pull the FANIN *pin of NCN5120 low. This can
be done by shorting J5 (add jumper). See datasheet for more
info on the FANIN *pin.
Additionally, there is a current limit on V20/3V3/VDD2
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