User's Manual

GE865 Hardware User Guide
1vv0300799 Rev.6 - 04/06/09
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights Reserved page 36 of 58
NOTE: The UART input line TXD (rx_uart) of the GE865 is NOT internally pulled up with a resistor, so there may be
the need to place an external 47KΩ pull-up resistor, either the DTR (dtr_uart) and RTS (rts_uart) input lines are not
pulled up internally, so an external pull-up resistor of 47KΩ may be required.
NOTE: The input lines working at 2.8VCMOS can be pulled-up with 47KΩ
In case of reprogramming of the module has to be considered the use of the RESET line to start correctly the
activity.
The preferable configuration is having an external supply for the buffer.