u-blox SARA-R4 Series, Руководство по системной интеграции

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SARA-R4 series - System Integration Manual
UBX-16029218 - R06 Appendix
Page 94 of 102
SARA-G3 SARA-U2 SARA-R4 SARA-N2
No Pin Name Description Pin Name Description Pin Name Description Pin Name Description Remarks for migration
14 GND Ground GND Ground 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 PWR_ON Power-on Input
200 k internal pull-up
L-level: -0.30 V ÷ 0.35 V
H-level: to be not forced
ON L-level pulse time:
0.15 s min – 3.2 s max
OFF L-level pulse time:
1.5 s min RSVD Reserved Not supported by SARA-N2
Internal vs No internal pull-up
Diverse voltage levels.
Diverse timings.
Diverse functions supported.
TestPoint recommended for R4
16 GPIO1 /
RSVD GPIO (G340/G350)
Reserved (G300/G310)
V_INT level (1.8 V)
Default: Pin disabled
Driver strength: 6 mA GPIO1 GPIO
V_INT level (1.8 V)
Default: Pin disabled
Driver strength: 6 mA
GPIO1 GPIO
V_INT level (1.8 V)
Default: Pin disabled
Driver strength: 2 mA GPIO1 GPIO
V_INT level (1.8 V)
Configurable as secondary
UART data output: TestPoint
recommended for diagnostic Diverse driver strength
TestPoint recommended for N2
17 RSVD Reserved VUSB_DET 5 V, USB Supply Detect Input VUSB_DET 5 V, USB Supply Detect Input RSVD Reserved USB detection vs Reserved
TestPoint recommended for U2/R4
18 RESET_N Reset input
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 (G340/G350)
3 s min (G300/G310) RESET_N Abrupt shutdown / reset input
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
RESET_N Abrupt shutdown input
37 k internal pull-up
L-level: -0.30 V ÷ 0.35 V
H-level: to be not forced
OFF L-level pulse time:
10 s min RESET_N Reset input
78 k internal pull-up
L-level: -0.30 V ÷ 0.36*VCC
H-level: 0.52*VCC ÷ VCC
Reset L-level pulse time:
100 ms min Diverse internal pull-up
Diverse voltage levels.
Diverse timings.
Diverse functions supported.
TestPoint always recommended
19 RSVD Reserved CODEC_CLK 13 or 26 MHz Output
V_INT level (1.8 V)
Default: Pin disabled
Driver strength: 4 mA
GPIO6 GPIO
V_INT level (1.8 V)
Default: Pin disabled
Driver strength: 2 mA RSVD Reserved Clock / GPIO vs Reserved
20-22 GND Ground GND Ground GND Ground GND Ground