User's Manual

SARA-R4 series - System Integration Manual
UBX-16029218 - R03 Appendix
Page 87 of 94
A.2 Pin-out comparison between SARA-R4 and SARA-G3
SARA-G3
SARA-R4
Pin No
Pin Name
Description
Pin Name
Description
Remarks for migration
1
GND
Ground
GND
Ground
2
V_BCKP
RTC Supply I/O
RSVD
Reserved
RTC supply not available on
SARA-R4 series modules
3
GND
Ground
GND
Ground
4
V_INT
Interfaces Supply Out
Output characteristics:
1.8 V typ, 70 mA max
V_INT
Interfaces Supply Out
Output characteristics:
1.8 V typ, 70 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: 2 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: ~33 k
DTR
UART DTR Input
1.8 V, Internal pull-up: ~100 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: ~100 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: 2 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: ~100 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: 2 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
200 k internal pull-up
L-level: -0.30 V – 0.35 V
H-level: 1.17 V – 2.10 V
ON L-level pulse time:
0.15 s min – 3.2 s max
OFF L-level pulse time: 1.5 s min
On SARA-R4 series, the
module is powered on
applying a low pulse on the
PWR_ON pin.
PWR_ON pin can be used to
power off SARA-R4 series
modules
16
GPIO1 / RSVD
1.8 V GPIO / Reserved
Default: Pin disabled
Driver strength: 6 mA
GPIO1
1.8 V GPIO
Default: Pin disabled
Driver strength: 2 mA
No functional difference
17
RSVD
Reserved
VUSB_DET
USB Detect Input
5 V, Supply detection
USB detection instead of
Reserved available on
SARA-R4 series
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
37 k internal pull-up
L-level: -0.30 V – 0.35 V
H-level: 1.17 V – 2.10 V
Reset L-level pulse time:
10 s min
On SARA-R4 series, a low
level on the RESET_N line
triggers an abrupt hardware
shutdown of the module
19
RSVD
Reserved
GPIO6
1.8 V GPIO
GPIO available instead of
Reserved on SARA-G3 series
20-22
GND
Ground
GND
Ground
23
GPIO2 / RSVD
1.8 V GPIO / Reserved
Default: GNSS supply enable
Driver strength: 6 mA
GPIO2
1.8 V GPIO
Default: Pin disabled
Driver strength: 2 mA
No functional difference
24
GPIO3 /
32K_OUT
1.8 V GPIO / 32 kHz Output
Default: GNSS data ready
Driver strength: 5 mA
GPIO3
1.8 V GPIO
Default: Pin disabled
Driver strength: 2 mA
No functional difference
25
GPIO4 / RSVD
1.8 V GPIO / Reserved
Default: GNSS RTC sharing
Driver strength: 6 mA
GPIO4
1.8 V GPIO
Default: Output/Low
Driver strength: 2 mA
No functional difference
26
SDA / RSVD
I
2
C Data I/O / Reserved
1.8 V, open drain, no internal pull-up
SDA
I
2
S Data I/O
1.8 V, open drain, internal pull-up
No functional difference
27
SCL / RSVD
I
2
C Clock Output / Reserved
1.8 V, open drain, no internal pull-up
SCL
I
2
C Clock Output
1.8 V, open drain, internal pull-up
No functional difference