N58 Hardware User Guide
Chapter 5 Application Interfaces
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60
Figure 5-35 Reference design of VBACKUP and VRTC power supply
Backup
Battery or
Farad Cap
N58 Module
GNSS Chip
+
R1
C1
VBACKUP
Backup
Battery or
Farad Cap
N58 Module
RTC circuit
+
C2
VRTC
0
Ω
R2
0
Ω
5.6.6 GPIO
Pin Name
Pin No.
I/O
Function
Remarks
GPIO_0
50
B
GPIO, with the interruption function
Leave this pin floating if it is not
used.
GPIO_2
80
B
GPIO, with the interruption function
Leave this pin floating if it is not
used.
GPIO_3
78
B
GPIO, with the interruption function
Leave this pin floating if it is not
used.
N58 provides three GPIO interfaces, and all of these GPIO interfaces support the interruption function.
5.6.7 GNSS_LNA_EN
Pin Name
Pin No.
I/O
Function
Remarks
GNSS_LNA_EN 90
DO
GNSS LNA enabling Leave this pin floating if it is not used.
N58 provides the enabling control pin for the external GNSS low noise amplifier.