Quectel BC660K-GL - ADC Interface; RI Interface

NB-IoT Module Series
BC660K-GL Hardware Design
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connected in series between the module and the USIM card connector to suppress EMI spurious
transmission and enhance ESD protection. Note that the module’s USIM peripheral devices should
be placed close to the USIM card connector.
The pull-up resistor of 10 kΩ on the USIM_DATA line can improve anti-jamming capability and should
be placed close to the USIM card connector.
3.9. ADC Interface
The module provides a 12-bit ADC input channel to read the voltage value.
Table 13: Pin Definition of ADC Interface
A 320 kΩ pull-down resistor is integrated inside the ADC pin. This resistor needs to be considered when
you calculate the voltage division relationship.
3.10. RI Interface
When there is a message received or a URC output, the module will notify DTE through the RI interface.
Table 14: Pin Definition of RI Interface
Pin Name
Pin No.
Description
Comment
ADC0
9
Analog to digital converter interface
Voltage range: 0–1.2 V
Pin Name
Pin No.
Description
Comment
RI
20
Ring indication
VDD_EXT power domain
NOTE
NOTE