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Tuesday, August 22nd 2017, 12:15pm

MAIN UART RX/TX on HE910 / EVK2

Hi there,

is it possible to get MAIN UART RX/TX from the HE910 Interface Board or the EVK2 through pins and not going through the RS232 sockets ?

Got everything running through USB but want to connect both MAIN and AUX UART to an MCU for further testing but can not find any pins to
connect to in the documentation. AUX seems to be available on PL303 but can not find MAIN.

Kind Regards,
Mark

2

Tuesday, August 22nd 2017, 2:18pm

Hi Mark,

please look at Telit_EVK2_User_Guide_r19.pdf in chapter 26.4.2 (page 117) you will find requested information.

It is on the adapterboard not on EVK2, see attached picture.

Regards,

Hüseyin
Hüseyin has attached the following image:
  • HE910AB.jpg

3

Tuesday, August 22nd 2017, 2:21pm

Hi Mark,

sorry I missunderstood. The main is under the PL303 at PL304, you can find information in documentation above.

Regards,

Hüseyin

4

Tuesday, August 22nd 2017, 3:58pm

Hi Hüseyin

PL303 / PL304 PIN 1 and PIN 2 are RX/TX AUX (USFI1), not MAIN (USIF0). I looked through all the schematics but can not find pins for USFI0, maybe it is only accessible through the RS232 Socket on the EVK2.

Kind Regards,
Mark

5

Wednesday, August 23rd 2017, 3:37pm

Hi Mark,

from our Telit support:

on pins RS232/USB switch.

Regards,

Hüseyin
Hüseyin has attached the following image:
  • RS232 USB switch.jpg

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