SARA-R4 series - System integration manual
UBX-16029218 - R20
System description
Page 14 of 128
C1-Public
Function Pin Name
Pin No
I/O
Description
Remarks
SIM
VSIM
41
O
SIM supply output Supply output for external SIM / UICC.
See section
for functional description.
See section
for external circuit design-in.
SIM_IO
39
I/O
SIM data
Data input/output for external SIM / UICC.
Internal 4.7 k
pull-up to VSIM.
See section
for functional description.
See section
for external circuit design-in.
SIM_CLK
38
O
SIM clock
Clock output for external SIM / UICC
See section
for functional description.
See section
for external circuit design-in.
SIM_RST
40
O
SIM reset
Reset output for 1.8 V / 3 V SIM
See section
for functional description.
See section
for external circuit design-in.
UART
RXD
13
O
UART data output 1.8 V output, Circuit 104 (RXD) in ITU-T V.24,
for AT commands, data communication, FOAT.
See section
for functional description.
See section
for external circuit design-in.
TXD
12
I
UART data input 1.8 V input, Circuit 103 (TXD) in ITU-T V.24,
for AT commands, data communication, FOAT.
Internal pull-down to GND on the SARA-R410M-02B version
Internal pull-up to V_INT on other product versions
See section
for functional description.
See section
for external circuit design-in.
CTS
11
O
UART clear to
send output
1.8 V output, Circuit 106 (CTS) in ITU-T V.24.
Not supported by SARA-R410M-01B, SARA-R410M-02B-00.
See section
for functional description.
See section
for external circuit design-in.
RTS
10
I
UART ready to
send input
1.8 V input, Circuit 105 (RTS) in ITU-T V.24.
Internal active pull-up to V_INT.
Not supported by SARA-R410M-01B, SARA-R410M-02B-00.
See section
for functional description.
See section
for external circuit design-in.
DSR
6
O /
I
UART DSR /
AUX UART RTS
1.8 V, Circuit 107 (Data Set Ready output) in ITU-T V.24,
configurable as Second Auxiliary UART RTS input.
14
See section
for functional description.
See section
for external circuit design-in.
RI
7
O /
O
UART RI /
AUX UART CTS
1.8 V, Circuit 125 (Ring Indicator output) in ITU-T V.24,
configurable as Second Auxiliary UART CTS output.
See section
for functional description.
See section
for external circuit design-in.
DTR
9
I /
I
UART DTR /
AUX UART input
1.8 V, Circuit 108/2 (Data Terminal Ready input) in ITU-T V.24,
configurable as Second Auxiliary UART data input.
Internal active pull-up to V_INT.
See section
for functional description.
See section
for external circuit design-in.
DCD
8
O /
O
UART DCD /
AUX UART output
1.8 V, Circuit 109 (Data carrier detect output) in ITU-T V.24,
configurable as Second Auxiliary UART data output.
See section
for functional description.
See section
for external circuit design-in.
14
The Second Auxiliary UART interface is not supported by SARA-R410M and SARA-R412M modules
