GE864-QUAD V2 Hardware User Guide
1vv0300841 Rev.5
–
2017-05-11
Reproduction forbidden without Telit Communications S.p.A. written authorization - All Rights
Reserved.
Page 49 of 77
NOTE:
The UART input line TXD (rx_uart) of the GE864-QUAD V2 is NOT
internally pulled up with a resistor, so there may be the need
to place an external 47K
Ω
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 47K
Ω
may be
required.
Care must be taken to avoid latch-up on the GE864-QUAD V2 and
the use of this output line to power electronic devices shall
be avoided, especially for devices that generate spikes and
noise such as switching level translators, micro controllers,
failure in any of these condition can severely compromise the
GE864-QUAD V2 functionality.
NOTE:
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 level translator.
