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spectrum
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Joined: 2015-03-11 18:26
PAN1740 design guide, UART pins

Hi,

would like to know in what pin the UART comes programmed from factory, in the PAN1740 design guide application note v.1.6 i see
on page 8, schematic shows UART is connected to P0.0(RX), P0.1(TX),
on page 36, schematic shows UART is connected to P0.4(TX), P0.5(RX). Why ?

Datasheet on PA1740 reports as in page 36. But a note(*) says the pin can also be programmed in a different way.
What does this mean ?
Also, looking with oscilloscope on P0.4(TX), P0.5(RX) is see a strange burst of data that's not rs232. Is this a propertary protocol ?

Thanks
Regards

Ingo
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GuruPanasonic
Joined: 2014-01-16 11:19
Hi, correct is P0.2, 0.3, 0.4

Hi, correct is P0.2, 0.3, 0.4, 0.5 are connected where as the P0.2 and P0.3 for RTS, CTS should be removed since they are not supported and can make problems. we will correct this in the guide, thanks for asking.
The burst of data you see is the bootloader trying to poll the FW over the ports, so you need to program the FW into the RAM first, then it stops and runs your firmware that can be programmed to use different ports for example. All the examples in the guide are made for the evaluation boards and run together with the SDK examples. Note we will update the guide recently and here is always the latest:
http://pideu.panasonic.de/files/Documents/WM%20Documents/PAN1740/PAN1740...
Best regards, Ingo