NB-IoT Module Series
BC66 Hardware Design
BC66_Hardware_Design 18 / 50
SPI_MISO
3
DI
Master input and
slave output of
SPI interface
1.8V power domain.
SPI_MOSI
4
DO
Master output
and slave input of
SPI interface
SPI_SCLK
5
DO
Clock signal of
SPI interface
SPI_CS
6
DO
Chip selection of
SPI interface
Reserved Pins
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
RESERVED
2, 8,
21~23,
25~26,
30~33,
44~58
Keep these pins
unconnected.
1. Keep all unused pins unconnected.
2.
“*” means under development.
3.4. Operating Modes
The following table briefly describes the three operating modes of the module.
Table 5: Overview of Operating Modes
Mode
Function
Normal Operation
Active
In active mode, all functions of the module are available and all
processors are active. Radio transmission and reception can be
performed. Transitions to idle mode or PSM can be initiated in active
mode.
Idle
In idle mode, the module is in light sleep and network connection is
maintained; paging messages can be received; transitions to active
mode or PSM can be initiated in idle mode.
NOTES
