u-blox SARA-G3 Series - Page 19

SARA-G3 series - System Integration Manual
UBX-13000995 - R06 Objective Specification System description
Page 19 of 218
Function
Pin Name
Module
Pin No
I/O
Description
Remarks
UART
RXD
All
13
O
UART data
output
1.8 V output, Circuit 104 (RXD) in ITU-T
V.24,
for AT command, data communication, FOAT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
TXD
All
12
I
UART data input
1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for AT command, data communication, FOAT.
Internal active pull-up to V_INT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
CTS
All
11
O
UART clear to
send output
1.8 V output, Circuit 106 (CTS) in ITU-T
V.24,
for AT command, Data communication, FOAT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
RTS
All
10
I
UART ready to
send input
1.8 V input, Circuit 105 (RTS) in ITU-T V.24,
for AT command, data communication, FOAT.
Internal active pull-up to V_INT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
DSR
All
6
O
UART data set
ready output
1.8 V output, Circuit 107 (DSR) in ITU-T
V.24,
for AT command, data communication, FOAT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
RI
All
7
O
UART ring
indicator output
1.8 V output, Circuit 125 (RI) in ITU-T V.24,
for AT command, data communication, FOAT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
DTR
All
9
I
UART data
terminal ready
input
1.8 V input, Circuit 108/2 (DTR) in ITU-T
V.24,
for AT command, data communication, FOAT.
Internal active pull-up to V_INT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.
DCD
All
8
O
UART data
carrier detect
output
1.8 V input, Circuit 109 (DCD) in ITU-T V.24,
for AT command, data communication, FOAT.
See section 1.9.11.9.1 for functional description.
See section 2.5.12.5.1 for external circuit design-
in.