Product Info

NB-IoT Module Series
BC660K-GL Hardware Design
BC660K-GL_Hardware_Design
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close to the (U)SIM card connector.

The pull-up resistor on the SIM_DATA line can improve anti-jamming capability and should be placed
close to the (U)SIM card connector.
It is necessary (U)SIM_DATA must add a 10 kΩ pull-up resistor to (U)SIM_VDD to improve
anti-interference ability.
3.9. ADC Interface*
The module provides a 12-bit ADC input channel to read the voltage value.
Table 12: Pin Definition of ADC Interface
1. 320 kΩ pull-down resistor is integrated inside the ADC pin. This resistor needs to be considered
when calculating the resistor divider relationship.
2. “*” means under development.
3.10. RI Interface*
When there is a message received or a URC output, the module will notify DTE through the RI interface.
Table 13: RI Signal Status
Pin Name
Pin No.
Description
Sample Range
ADC0
9
Analog to digital converter interface
0–1.2 V
Module Status
RI Signal Level
Standby
High pulse
URC
When a URC is received, RI outputs 120 ms low pulse and starts data output.
NOTES
NOTE