SARA-G3 and SARA-U2 series - System Integration Manual
UBX-13000995 - R26
Appendix
Page 209 of 217
B.2
Pin-out comparison between SARA-G3 and SARA-U2
SARA-G3
SARA-U2
Pin No
Pin Name
Description
Pin Name
Description
Remarks for migration
1
GND
Ground
GND
Ground
2
V_BCKP
RTC Supply I/O
Output characteristics:
2.3 V typ, 2 mA max
Input op. range:
1.0 V – 2.4 V
V_BCKP
RTC Supply I/O
Output characteristics:
1.8 V typ, 3 mA max
Input op. range:
1.0 V – 1.9 V
No functional difference
3
GND
Ground
GND
Ground
4
V_INT
Interfaces Supply Out
Output characteristics:
1.8 V typ, 50 mA max
V_INT
Interfaces Supply Out
Output characteristics:
1.8 V typ, 50 mA max
No functional difference
5
GND
Ground
GND
Ground
6
DSR
UART DSR Output
1.8 V, Driver strength: 6 mA
DSR
UART DSR Output
1.8 V, Driver strength: 1 mA
No functional difference
7
RI
UART RI Output
1.8 V, Driver strength: 6 mA
RI
UART RI Output
1.8 V, Driver strength: 2 mA
No functional difference
8
DCD
UART DCD Output
1.8 V, Driver strength: 6 mA
DCD
UART DCD Output
1.8 V, Driver strength: 2 mA
No functional difference
9
DTR
UART DTR Input
1.8 V, Internal pull-up: ~33k
DTR
UART DTR Input
1.8 V, Internal pull-up: ~14 k
No functional difference
10
RTS
UART RTS Input
1.8 V, Internal pull-up:~58 k
RTS
UART RTS Input
1.8 V, Internal pull-up: ~8 k
No functional difference
11
CTS
UART CTS Output
1.8 V, Driver strength: 6 mA
CTS
UART CTS Output
1.8 V, Driver strength: 6 mA
No functional difference
12
TXD
UART Data Input
1.8 V, Internal pull-up:~18 k
TXD
UART Data Input
1.8 V, Internal pull-up: ~8 k
No functional difference
13
RXD
UART Data Output
1.8 V, Driver strength: 6 mA
RXD
UART Data Output
1.8 V, Driver strength: 6 mA
No functional difference
14
GND
Ground
GND
Ground
15
PWR_ON
Power-on Input
No internal pull-up
L-level: -0.10 V – 0.65 V
H-level: 2.00 V – 4.50 V
ON L-level time:
5 ms min
OFF L-level pulse time:
Not Available
PWR_ON
Power-on Input
No internal pull-up
L-level: -0.30 V – 0.65 V
H-level: 1.50 V – 4.40 V
ON L-level pulse time:
50 µs min / 80 µs max
OFF L-level pulse time:
1 s min
No functional difference
16
GPIO1 / RSVD
1.8 V GPIO / Reserved
Default: Pin disabled
Driver strength: 6 mA
Internal pull-down: ~35 k
GPIO1
1.8 V GPIO
Default: Pin disabled
Driver strength: 6 mA
Internal pull-down: ~9 k
No functional difference
17
RSVD
Reserved
VUSB_DET
USB Detect Input
5 V, Supply detection
USB detection instead of
Reserved
18
RESET_N
Reset signal
Internal diode & pull-up
L-level: -0.30 V – 0.30 V
H-level: 2.00 V – 4.70 V
Reset L-level pulse time:
50 ms min (SARA-G350/G340)
3 s min (SARA-G300/G310)
RESET_N
Reset signal
10 k
internal pull-up
L-level: -0.30 V – 0.51 V
H-level: 1.32 V – 2.01 V
Reset L-level pulse time:
50 ms min
No functional difference
19
RSVD
Reserved
CODEC_CLK 13 or 26 MHz Output
Driver strength: 4 mA
Clock output instead of
Reserved
20-22
GND
Ground
GND
Ground
23
GPIO2 / RSVD
1.8 V GPIO / Reserved
Default: GNSS supply enable
Driver strength: 6 mA
Internal pull-down: ~35 k
GPIO2
1.8 V GPIO
Default: GNSS supply enable
Driver strength: 1 mA
Internal pull-down: ~14 k
No functional difference
24
GPIO3 / 32K_OUT
1.8 V GPIO / 32 kHz Output
Default: GNSS data ready
Driver strength: 5 mA
Inner pull-down: ~67 k
GPIO3
1.8 V GPIO
Default: GNSS data ready
Driver strength: 6 mA
Internal pull-down: ~9 k
No functional difference
