Product Info

LTE Standard Module Series

EG91 Series Hardware Design

EG91_Series_Hardware_Design

55 / 102

Table 19: Pin Definition of ADC Interface

Pin Name

Pin No.

I/O

Description

Comment

ADC0

General-purpose analog to digital

converter

If unused, keep this pin

open.

The following table describes the characteristics of ADC interface.

Table 20: Characteristics of ADC Interface

Parameter Min. Typ. Max. Unit

ADC0 Voltage Range 0.3 VBAT_BB V

ADC Resolution 15 bits

NOTES

1. It is prohibited to supply any voltage to ADC pins when ADC pins are not powered by VBAT.

2. It is recommended to use resistor divider circuit for ADC application.

3.17.

Behaviors of RI

AT+QCFG="risignaltype","physical" command can be used to configure RI behavior. The default RI

behaviors can be changed by AT+QCFG="urc/ri/ring" command. Please refer to document [2] for

details.

No matter on which port URC is presented, URC will trigger the behavior of RI pin.

NOTE

URC can be outputted from UART port, USB AT port and USB modem port through configuration via

AT+QURCCFG command. The default port is USB AT port.

The default behaviors of the RI are shown as below.