u-blox SARA-R4 Series, System Integration Manual

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SARA-R4 series - System Integration Manual
UBX-16029218 - R06 Appendix
Page 93 of 102
A.2 Pin-out comparison between SARA-G3, SARA-U2, SARA-R4 and SARA-N2 modules
SARA-G3 SARA-U2 SARA-R4 SARA-N2
No Pin Name Description Pin Name Description Pin Name Description 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 Supply Output:
1.8 V typ, 70 mA max V_INT Supply Output:
1.8 V typ, 70 mA max V_INT Supply Output:
1.8 V typ, 70 mA max
Switched-off in deep-sleep V_INT Supply Output:
1.8 V typ, 70 mA max
Switched-off when 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 SARA-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 SARA-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 SARA-N2
Diverse driver strength
9 DTR UART DTR Input
V_INT level (1.8 V)
Internal pull-up: ~33 k DTR UART DTR Input
V_INT level (1.8 V)
Internal pull-up: ~14 k DTR UART DTR Input
V_INT level (1.8 V)
Internal pull-up: ~100 k RSVD Reserved Not supported by SARA-N2
Diverse internal pull-up value
10 RTS UART RTS Input
V_INT level (1.8 V)
Internal pull-up:~58 k RTS UART RTS Input
V_INT level (1.8 V)
Internal pull-up: ~8 k RTS UART RTS Input 14
V_INT level (1.8 V)
Internal pull-up: ~100 k
It must be set low to use UART
RTS UART RTS Input 14
VCC level (3.6 V typ.)
Internal pull-up: ~78 k
Diverse level (V_INT vs VCC)
Diverse internal pull-up value.
Diverse functions supported.
11 CTS UART CTS Output
V_INT level (1.8 V)
Driver strength: 6 mA CTS UART CTS Output
V_INT level (1.8 V)
Driver strength: 6 mA CTS UART CTS Output
14
V_INT level (1.8 V)
Driver strength: 2 mA
CTS UART CTS Output
14
VCC level (3.6 V typ.)
Driver strength: 1 mA
Configurable as RI output line
Diverse level (V_INT vs VCC)
Diverse driver strength.
Diverse functions supported.
12 TXD UART Data Input
V_INT level (1.8 V)
Internal pull-up:~18 k TXD UART Data Input
V_INT level (1.8 V)
Internal pull-up: ~8 k TXD UART Data Input
V_INT level (1.8 V)
Internal pull-up: ~100 k TXD UART Data Input
VCC level (3.6 V typ.)
Internal pull-up: ~78 k Diverse level (V_INT vs VCC)
Diverse internal pull-up value
TestPoint always recommended
13 RXD UART Data Output
V_INT level (1.8 V)
Driver strength: 6 mA RXD UART Data Output
V_INT level (1.8 V)
Driver strength: 6 mA RXD UART Data Output
V_INT level (1.8 V)
Driver strength: 2 mA RXD UART Data Output
VCC level (3.6 V typ.)
Driver strength: 1 mA Diverse level (V_INT vs VCC)
Diverse driver strength
TestPoint always recommended
14 Supported by future product versions