Ublox SARA-R4 Series - System features; 14.1 Firmware installation +UFWINSTALL

SARA-R4/N4 series - System Integration Manual
UBX-16029218 - R11 Appendix Page 144 of 157
A.2 Pin-out comparison
Table 40 shows a pin-out comparison between the SARA-G3, SARA-U2, SARA-R4/N4, and SARA-N2 modules.
No
SARA-G3
Pin Name
Description
SARA-U2
Pin Name
Description
SARA-R4
Pin Name
Description
SARA-N2
Pin Name
Description
Remarks for migration
1
GND
Ground
GND
Ground
GND
Ground
GND
Ground
2
V_BCKP
RTC Supply I/O
V_BCKP
RTC Supply I/O
RSVD
Reserved
RSVD
Reserved
RTC supply vs Reserved
3
GND
Ground
GND
Ground
GND
Ground
GND
Ground
4
V_INT
Interfaces Supply Output:
1.8 V typ, 70 mA max
V_INT
Interfaces Supply Output:
1.8 V typ, 70 mA max
V_INT
Interfaces Supply Output:
1.8 V typ, 70 mA max
Switched-off in deep-sleep
V_INT
Interfaces Supply Output:
1.8 V typ, 70 mA max
Switched-off if radio is off
V_INT is switched off in deep
sleep (R4), or if radio is off (N2).
TestPoint always recommended
5
GND
Ground
GND
Ground
GND
Ground
GND
Ground
6
DSR
UART DSR Output
V_INT level (1.8 V)
Driver strength: 6 mA
DSR
UART DSR Output
V_INT level (1.8 V)
Driver strength: 1 mA
DSR
UART DSR Output
V_INT level (1.8 V)
Driver strength: 2 mA
RSVD
Reserved
Not supported by N2
Diverse driver strength
7
RI
UART RI Output
V_INT level (1.8 V)
Driver strength: 6 mA
RI
UART RI Output
V_INT level (1.8 V)
Driver strength: 2 mA
RI
UART RI Output
V_INT level (1.8 V)
Driver strength: 2 mA
RSVD
Reserved
Not supported by N2
Diverse driver strength
8
DCD
UART DCD Output
V_INT level (1.8 V)
Driver strength: 6 mA
DCD
UART DCD Output
V_INT level (1.8 V)
Driver strength: 2 mA
DCD
UART DCD Output
V_INT level (1.8 V)
Driver strength: 2 mA
RSVD
Reserved
Not supported by N2
Diverse driver strength
9
DTR
UART DTR Input
V_INT level (1.8 V)
Internal pull-up: ~33 k
It must be set low to have
greeting text sent over UART
DTR
UART DTR Input
V_INT level (1.8 V)
Internal pull-up: ~14 k
It must be set low to have
greeting text sent over UART
DTR
UART DTR Input
V_INT level (1.8 V)
Internal pull-up: ~100 k
It must be set low to have
URCs sent over UART
RSVD
Reserved
Not supported by N2
Diverse internal pull-up value