Other Interfaces; Gnss_Lna_En; Adc; Ring - Neoway N75 Series Hardware User's Manual

3.8 Other Interfaces

3.8.1 GNSS_LNA_EN

Signal
GNSS_LNA_EN
For detailed functions, see section 3.5.2 ANT_GNSS Interface.

3.8.2 ADC

Signal Pin
ADC1 89
ADC2 88
The module provides two ADC channels, and the input voltage ranges from 0.1 V to 1.7 V. The ADC
pins support the highest precision of 15 bit and it can be used for temperature detection and another
check.

3.8.3 RING

Signal Pin I/O
RING 13 DO
Incoming voice call
⚫
Once a voice call is incoming, the UART port outputs "RING" character strings and meanwhile
the RING pin outputs a negative pulse with a width of 30 ms and a period of 5 seconds.
Copyright © Neoway Technology Co., Ltd
Pin I/O Function
90 DO GNSS_LNA enable
I/O Function
AI Analog-to-digital signal conversion
AI Analog-to-digital signal conversion
Function
Incoming call/SMS indicator

Figure 3-56 Pulse wave for an incoming call

30 ms
Remarks
Used for external GNSS_LNA
Remarks
Used for external GNSS_LNA
5 s
N75 Hardware User Guide
Chapter 3 Application Interfaces
Remarks
30 ms
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