Quectel BC950N-N1 Supplement

BC950N-N1
Hardware Design
LPWA Module Series
Rev. BC950N-N1_Hardware_Design_V1.0
Date: 2019-06-14
Status: Preliminary
www.quectel.com

LPWA Module Series
BC950N-N1 Hardware Design
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About the Document
History
Revision Date Author Description
1.0 2019-06-14
Ostrovsky WEI/
Newgate HUA/
Scofield ZHANG Initial
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Contents
About the Document...................................................................................................................................2
Contents.......................................................................................................................................................3
Table Index...................................................................................................................................................5
Figure Index.................................................................................................................................................6
1Introduction..........................................................................................................................................7
1.1. Safety Information.......................................................................................................................8
2Product Concept..................................................................................................................................9
2.1. General Description ....................................................................................................................9
2.2. Key Features.............................................................................................................................10
2.3. Functional Diagram...................................................................................................................11
2.4. Development Board ..................................................................................................................12
3Application Interfaces .......................................................................................................................13
3.1. General Description ..................................................................................................................13
3.2. Pin Assignment .........................................................................................................................14
3.3. Pin Description..........................................................................................................................15
3.4. Operating Modes.......................................................................................................................19
3.4.1. Operating Modes of NB-IoT...........................................................................................19
3.4.2. Deep Sleep Mode ..........................................................................................................20
3.4.3. Operating Modes of Bluetooth*......................................................................................22
3.5. Power Supply............................................................................................................................22
3.5.1. Power Supply Pins.........................................................................................................22
3.5.2. Reference Design for Power Supply..............................................................................23
3.6. Power up/Power Down Scenarios............................................................................................24
3.6.1. Power up........................................................................................................................24
3.6.2. Power Down...................................................................................................................25
3.6.3. Reset the Module...........................................................................................................26
3.7. USB Interface............................................................................................................................27
3.8. UART Interfaces........................................................................................................................29
3.8.1. Main UART Port .............................................................................................................30
3.8.2. Debug UART Port ..........................................................................................................30
3.8.3. Auxiliary UART Port .......................................................................................................31
3.8.4. Bluetooth UART Port* ....................................................................................................31
3.8.5. UARTApplication...........................................................................................................32
3.9. USIM Interface..........................................................................................................................33
3.10. ADC Interface* ..........................................................................................................................35
3.11. RI Behaviors..............................................................................................................................36
3.12. Bluetooth Interface*...................................................................................................................36
3.13. Network Status Indication .........................................................................................................37
4Antenna Interface...............................................................................................................................38
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4.1. Pin Definition.............................................................................................................................38
4.2. Operating Frequencies .............................................................................................................38
4.3. RF Antenna Reference Design.................................................................................................39
4.4. Reference Design of RF Layout ...............................................................................................40
4.5. Antenna Requirements .............................................................................................................42
4.6. RF Output Power ......................................................................................................................43
4.7. RF Receiving Sensitivity...........................................................................................................44
4.8. Recommended RF Connector for Antenna Installation............................................................45
5Electrical and Reliability Characteristics ........................................................................................47
5.1. Operation and Storage Temperatures.......................................................................................47
5.2. Current Consumption................................................................................................................47
5.3. Electrostatic Discharge .............................................................................................................48
6Mechanical Dimensions....................................................................................................................49
6.1. Mechanical Dimensions of the Module.....................................................................................49
6.2. Recommended Footprint ..........................................................................................................51
6.3. Top and Bottom Views of the Module.......................................................................................52
7Storage, Manufacturing and Packaging..........................................................................................53
7.1. Storage......................................................................................................................................53
7.2. Manufacturing and Soldering....................................................................................................54
7.3. Packaging..................................................................................................................................55
7.3.1. Tape and Reel Packaging..............................................................................................55
8Appendix A References.....................................................................................................................57
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Table Index
TABLE 1: FREQUENCY BANDS OF BC950N-N1 MODULE .......................................................................... 9
TABLE 2: BC950N-N1 KEY FEATURES ...................................................................................................... 10
TABLE 3: I/O PARAMETERS DEFINITION.................................................................................................. 15
TABLE 4: PIN DESCRIPTION...................................................................................................................... 15
TABLE 5: OPERATING MODE OF AP ......................................................................................................... 19
TABLE 6: OPERATING MODE OF MODEM................................................................................................. 20
TABLE 7: OPERATING MODE OF MODULE SYSTEM................................................................................ 20
TABLE 8: POWER SUPPLY PINS................................................................................................................ 22
TABLE 9: PWRKEY PIN .............................................................................................................................. 24
TABLE 10: RESET PIN................................................................................................................................ 26
TABLE 11: PIN DEFINITION OF USB INTERFACE...................................................................................... 28
TABLE 12: PIN DEFINITION OF UART INTERFACES................................................................................. 29
TABLE 13: PIN DEFINITION OF USIM INTERFACE.................................................................................... 34
TABLE 14: PIN DEFINITION OF ADC INTERFACE...................................................................................... 35
TABLE 15: RI SIGNAL STATUS................................................................................................................... 36
TABLE 16: MODULE STATUS INDICATED BY NETLIGHT.......................................................................... 37
TABLE 17: PIN DEFINITION OF NB-IOT & BT ANTENNA INTERFACE....................................................... 38
TABLE 18: MODULE OPERATING FREQUENCIES.................................................................................... 38
TABLE 19: ANTENNA CABLE INSERTION LOSS REQUIREMENTS........................................................... 42
TABLE 20: REQUIRED ANTENNA PARAMETERS...................................................................................... 42
TABLE 21: RF CONDUCTED OUTPUT POWER......................................................................................... 43
TABLE 22: RECEIVING SENSITIVITY (WITH RF RETRANSMISSIONS)..................................................... 44
TABLE 23: OPERATION AND STORAGE TEMPERATURES....................................................................... 47
TABLE 24: ELECTROSTATIC DISCHARGE CHARACTERISTICS (25ºC, 45% RELATIVE HUMIDITY)........ 48
TABLE 25: RECOMMENDED THERMAL PROFILE PARAMETERS............................................................. 54
TABLE 26: RELATED DOCUMENTS........................................................................................................... 57
TABLE 27: TERMS AND ABBREVIATIONS.................................................................................................. 57
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Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM........................................................................................................... 12
FIGURE 2: PIN ASSIGNMENT .................................................................................................................... 14
FIGURE 3: MODULE POWER CONSUMPTION IN DIFFERENT MODES ................................................... 21
FIGURE 4: TIMING OF WAKING UP MODULE FROM PSM........................................................................ 22
FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY......................................................................... 23
FIGURE 6: TURN ON THE MODULE USING DRIVING CIRCUIT................................................................ 24
FIGURE 7: TURN ON THE MODULE USING KEYSTROKE........................................................................ 24
FIGURE 8: POWER UP TIMING.................................................................................................................. 25
FIGURE 9: POWER DOWN TIMING (POWER DOWN BY AT COMMAND).................................................. 25
FIGURE 10: POWER DOWN TIMING (POWER DOWN BY DISCONNECTING VBAT)................................ 26
FIGURE 11: REFERENCE CIRCUIT OF RESET BY USING DRIVING CIRCUIT.......................................... 26
FIGURE 12: REFERENCE CIRCUIT OF RESET BY USING BUTTON......................................................... 27
FIGURE 13: RESET TIMING ....................................................................................................................... 27
FIGURE 14: USB INTERFACE REFERENCE DESIGN................................................................................ 28
FIGURE 15: REFERENCE DESIGN FOR MAIN UART PORT ..................................................................... 30
FIGURE 16: REFERENCE DESIGN OF DEBUG UART PORT.................................................................... 31
FIGURE 17: REFERENCE DESIGN OF AUXILIARY UART PORT............................................................... 31
FIGURE 18: REFERENCE DESIGN OF BLUETOOTH UART PORT............................................................ 31
FIGURE 19: REFERENCE CIRCUIT WITH VOLTAGE LEVEL TRANSLATOR CHIP.................................... 32
FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT ........................................................... 32
FIGURE 21: SKETCH MAP FOR RS-232 INTERFACE MATCH................................................................... 33
FIGURE 22: REFERENCE CIRCUIT FOR USIM INTERFACE WITH A 6-PIN USIM CARD CONNECTOR... 34
FIGURE 23: BEHAVIORS OF RI WHEN A URC OR SMS MESSAGE IS RECEIVED ................................. 36
FIGURE 24: REFERENCE DESIGN OF NETLIGHT.................................................................................... 37
FIGURE 25: REFERENCE DESIGN OF NB-IOTANTENNA INTERFACE.................................................... 40
FIGURE 26: MICROSTRIP LINE DESIGN ON A2-LAYER PCB................................................................... 40
FIGURE 27: COPLANAR WAVEGUIDE LINE DESIGN ON A 2-LAYER PCB................................................ 40
FIGURE 28: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 3AS REFERENCE
GROUND) .............................................................................................................................. 41
FIGURE 29: COPLANAR WAVEGUIDE LINE DESIGN ON A 4-LAYER PCB (LAYER 4AS REFERENCE
GROUND) .............................................................................................................................. 41
FIGURE 30: DIMENSIONS OF THE U.FL-R-SMT CONNECTOR (UNIT: MM).............................................. 45
FIGURE 31: MECHANICALS OF U.FL-LP CONNECTORS.......................................................................... 45
FIGURE 32: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM)......................................................... 46
FIGURE 33: TOP VIEW OF THE MODULE.................................................................................................. 52
FIGURE 34: BOTTOM VIEW OF THE MODULE.......................................................................................... 52
FIGURE 35: TAPE DIMENSIONS (UNIT: MM).............................................................................................. 56
FIGURE 36: REEL DIMENSIONS (UNIT: MM)............................................................................................. 56
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1Introduction
This document defines the BC950N-N1 module and describes its air interface and hardware interfaces
which are connected with the customers’ applications.
This document can help customers quickly understand module interface specifications, electrical and
mechanical details, as well as other related information of the module. Associated with application notes
and user guides, customers can use BC950N-N1 to design and set up mobile applications easily.
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1.1. Safety Information
The following safety precautions must be observed during all phases of operation, such as usage, service
or repair of any cellular terminal or mobile incorporating BC950N-N1 module. Manufacturers of the cellular
terminal should send the following safety information to users and operating personnel, and incorporate
these guidelines into all manuals supplied with the product. If not so, Quectel assumes no liability for
customers’ failure to comply with these precautions.
Full attention must be given to driving at all times in order to reduce the risk of an
accident. Using a mobile while driving (even with a handsfree kit) causes
distraction and can lead to an accident. Please comply with laws and regulations
restricting the use of wireless devices while driving.
Switch off the cellular terminal or mobile before boarding an aircraft. The operation
of wireless appliances in an
aircraft is forbidden to prevent interference with
communication systems. If the device offers an Airplane Mode, then it should be
enabled prior to boarding an aircraft. Please consult the airline staff
for more
restrictions on the use of wireless devices on boarding the aircraft.
Wireless devices may cause interference
on sensitive medical equipment, so
please be aware of the restrictions on the use of wireless devices
when in
hospitals, clinics or other healthcare facilities.
Cellular terminals or
mobiles operating over radio signals and cellular network
cannot be guaranteed to connect in all possible conditions (for example, with
unpaid bills or with an invalid (U)SIM card). When emergent help is needed in such
conditions, please remember using emergency call. In order to make or receive a
call, the cellular terminal or mobile must be switched on in a service area with
adequate cellular signal strength.
The cellular terminal or mobile contains a transmitter and receiver. When it is ON, it
receives and transmits radio frequency signals. RF interference can occur if it is
used close to TV set, radio, computer or other electric equipment.
In locations with potentially explosive atmospheres, obey all posted signs to turn
off wireless devices such as your phone or other cellular terminals. Areas with
potentially explosive atmospheres include fuelling areas, below decks on boats,
fuel or chemical transfer or storage facilities, areas where the air contains
chemicals or particles such as grain, dust or metal powders, etc.
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2Product Concept
2.1. General Description
BC950N-N1 is a high-performance NB-IoT module supporting Bluetooth* with extremely low power
consumption. It is designed to communicate with infrastructures of mobile network operators through
NB-IoT radio protocols (3GPP Rel.13). BC950N-N1 supports a broad range of frequency bands as listed
below.
Table 1: Frequency Bands of BC950N-N1 Module
BC950N-N1 is an SMD type module with LCC+LGA package featuring an ultra-compact profile of
23.6mm ×19.9mm ×2.2mm, which enables it to be easily embedded into size-constrained applications
and provide reliable connectivity with the applications.
BC950N-N1 provides abundant external interfaces (UART, USB, ADC*, NETLIGHT, etc.) and protocol
stacks (UDP/TCP, LwM2M*, MQTT*, etc.), offering great convenience for customers' applications.
Featuring compact form factor, ultra-low power consumption and extended temperature range,
BC950N-N1 is a best choice for a wide range of IoT applications, such as smart metering, bike sharing,
smart wearables, smart parking, smart city, home appliances, security and asset tracking, agricultural and
environmental monitoring, etc. It is also able to provide a complete range of SMS* and data transmission
services to meet customers’ demands.
The module fully complies with the RoHS directive of the European Union.
“*” means under development.
Mode BC950N-N1
H-FDD B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B31/B66
NOTE
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2.2. Key Features
The following table describes the detailed features of BC950N-N1 module.
Table 2: BC950N-N1 Key Features
Feature Details
Power Supply Supply voltage: 3.4V~4.6V

Typical supply voltage: 3.8V
Power Saving Typical power consumption: 4.2μA
Frequency bands
LTE Cat NB1:
B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B26/B28/B31/B66
Transmitting Power 23dBm±2dB
USIM Interface Support 1.8V/3.0V USIM card
USB Interface

Conform to USB 1.1 specifications, with maximum data transfer rate up to
12Mbps
Used for software debugging and upgrading

Support USB serial driver under Windows/Linux operating systems
UART Interfaces
Main UART Port:
Used for AT command communication, data transmission
and firmware
upgrade.
By default, the module is in auto-baud mode, and it supports automatic
baud rates not exceeding 115200bps. When powering on the module, the
MCU has to send AT command consecutively to synchronize baud rate
with the module.When OK is returned, it indicates the baud rate has been
synchronized successfully. When the module is woken up from PSM or
idle mode, the baud rate synchronized during start-up will be used directly.
When the port is used for firmware upgrade, the baud rate is 921600bps
by default.
Debug UART Port:
Used for firmware debugging.
Default baud rate: 115200bps
Auxiliary UART Port:
Used for firmware debugging.
Default baud rate: 115200bps
Bluetooth UART Port*:

Used for communication with DTE.
Network Protocols 
UDP/TCP/LwM2M*/MQTT*/DTLS*/SNTP*/CoAP*/PPP*/TLS*/HTTP*/
HTTPS*
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1. 1) Within operation temperature range, the module is 3GPP compliant.
2. 2) Within extended temperature range, the module remains the ability to establish and maintain
functions such as SMS*, data transmission, etc., without unrecoverable malfunction, effects on radio
spectrum or harm to radio network. Only one or more parameters like Pout might reduce in their value
and exceed the specified tolerances. When the temperature returns to normal operation temperature
levels, the module will meet 3GPP specifications again.
3. "*" means under development.
2.3. Functional Diagram
The following figure shows a block diagram of BC950N-N1 and illustrates the major functional parts.
Radio frequency
Bluetooth*
Baseband
Power management
Peripheral interfaces
SMS* Text/PDU mode
Data Transmission
Features

Single-tone: 25.5kbps (DL)/16.7kbps (UL)
Multi-tone: 25.5kbps (DL)/62.5kbps (UL)
AT Commands 
3GPP TS 27.005/3GPP TS 27.007 AT commands (3GPP Rel.13) and
Quectel enhanced AT commands
Firmware Update Upgrade firmware via main UART port or DFOTA*, or USB.
Real Time Clock Supported
Physical
Characteristics
Size: (23.6±0.15)mm × (19.9±0.15)mm × (2.2±0.2)mm
Package: LCC+LGA

Weight: 1.8g±0.2g
Temperature Range

Operation temperature range: -35°C ~ +75°C
1)
Extended temperature range: -40°C ~ +85°C 2)
Storage temperature range: -40°C ~ +90°C
Antenna Interfaces Including RF antenna interface and BT antenna interface*
50Ωimpedance control
RoHS All hardware components are fully compliant with EU RoHS directive
NOTES
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RF_ANT
PA
Buck
PMU
BUCK
RF Transceiver
and Subsystem
XO
26MHz
XTAL
Baseband
RESET ADC*
MAIN_UART
AUX_URAT
Flash
PSRAM
NETLIGHT
TX
RX
32KHz
RTC BLOCK
PSM_ENIT
USIM
PWRKEY
DBG_UART
USIM
USB
VBAT
VDD_EXT
ASM
BLuetooth
XO
32MHz
XTAL
BT_ANT*
UART_BT*
GPIO1~4_BT*
RESET_BT*
VCC_BT*
SWD_BT*
Switch
Enable
LDO
IO
Domain
Enable
Figure 1: Functional Diagram
“*” means under development.
2.4. Development Board
Quectel provides a complete set of development tools to facilitate the use and testing of BC950N-N1
module. The development tool kit includes TE-B board, USB cable, antenna and other peripherals. For
more details, please refer to document [1].
NOTE
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3Application Interfaces
3.1. General Description
BC950N-N1 is equipped with a total of 94 pins, including 54 LCC pins and 40 LGA pins. The subsequent
chapters will provide detailed descriptions of the following functions/pins/interfaces:
PSM
Power Supply
PWRKEY
RESET
USB Interface
UART Interfaces
USIM Interface
ADC Interface*
RI Behaviors
Network Status Indication
Bluetooth Interface*
“*” means under development.
NOTE
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3.2. Pin Assignment
Power ANT GND UART USIM
SIM_GND
SIM_CLK
SIM_DATA
SIM_RST
SIM_VDD
ADC*
RESERVED
VDD_EXT
PWRKEY
RESET
NETLIGHT
Top View
GND
RF_ANT
VBAT
VCC_BT*
GND
GND
GND
GND
VBAT
TXD
RXD
RI
SWDIO_BT*
SWDCLK_BT*
TXD_BT*
RXD_BT*
RXD_DBG
TXD_DBG
PSM_EINT
Other
2
3
4
5
6
7
8
9
10
11
12
13
14
17 18 19 20 23
27
26
25
24 22 21
54 53 52 51 48 44 45 46 47
15
42
41
40
39
38
37
36
35
34
33
32
31
30
29
GND
GND
BC950N-N1
50 49
USB
55 75
56 76
57 77
58 78
59 79
60 80
90 70
89 69
88 68
87 67
86 66
85 65
74 73
94 93
72 71
92 91
81 82
61 62
83 84
63 64
RXD _A UX
TXD_A UX
USB _3V3
USB _DM
USB _DP
RESERVED
1
16 28
43
GND
RESERVED RESERVED RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
GND
RESERVED
RESERVED
CTS_A UX
RTS_A UX
USB _MO DE
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
RESERVED
GND
GND
RESERVEDGND
GNDGND
GND GND GND GND
GND
GND RESERVED
GND GND GND GND
GNDGNDGND RESERVED
RESERVED RESERVED
GP IO1_BT*
GP IO2_BT*
RESET_BT*
GP IO3_BT*
GP IO4_BT*
BT_ANT*
RESERVED
RESERVED
RESERVED
RESERVED
ADC*
RESERVED
RESERVED
Figure 2: Pin Assignment
1. Keep all reserved pins unconnected.
2. “*” means under development.
NOTES
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3.3. Pin Description
Table 3: I/O Parameters Definition
Type Description
AI Analog input
AO Analog output
DI Digital input
DO Digital output
IO Bidirectional
PI Power input
PO Power output
Table 4: Pin Description
Power Supply
Pin Name Pin No. I/O Description DC Characteristics Comment
VBAT 45, 46 PI Power supply for
the module
Vmax=4.6V
Vmin=3.4V
Vnorm=3.8V
VDD_
EXT 26 PO 3.0V output power supply Vnorm=3.0V
No voltage output in
PSM mode.
It is intended to
supply power for the
module’s pull-up
circuits, and is thus
not recommended to
be used as the power
supply for external
circuits.
VCC_BT* 1 PI Power supply for
the Bluetooth
Vnorm: 1.7V~3.6V
GND 2, 7, 9,
43, 47,
GND
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48, 51,
52, 54,
59~66,
71~74,
81~83,
92~94
Power Key Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
PWRKEY 14 DI Pull down PWRKEY to turn
on the module
VILmax=0.99V
VIHmin=2.3V
Reset Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
RESET 15 DI Reset the
module Active low.
PSM_EINT Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
PSM_EINT 27 DI
Dedicated
external interrupt
pin.
Used to wake up
the module from
PSM.
Network Status Indication
Pin Name Pin No. I/O Description DC Characteristics Comment
NETLIGHT 18 DO Network status
indication
ADC Interface*
Pin Name Pin No. I/O Description DC Characteristics Comment
ADC* 21 AI
General purpose
analog to digital
converter
interface
Voltage range:
0V~1.4V
Main UART Port
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Pin Name Pin No. I/O Description DC Characteristics Comment
RXD 29 DI Receive data 3.0V power domain.
TXD 30 DO Transmit data
Auxiliary UART Port
Pin Name Pin No. I/O Description DC Characteristics Comment
RXD_AUX 55 DI Receive data
3.0V power domain.
TXD_AUX 56 DO Transmit data
CTS_AUX 57 DO Clear to Send
RTS_AUX 58 DO Request to Send
Debug UART Port
Pin Name Pin No. I/O Description DC Characteristics Comment
RXD_DBG 19 DI Receive data 3.0V power domain.
TXD_DBG 20 DO Transmit data
Ringing Signal
Pin Name Pin No. I/O Description DC Characteristics Comment
RI 34 DO Ring indication
signal
3.0V power domain.
USIM Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
SIM_VDD 38 DO
USIM card
power supply Vnorm=1.8V/3.0V
SIM_RST 39 DO
USIM card reset
signal
V
OL
max=0.15×SIM_VDD
VOHmin=0.85×SIM_VDD
SIM_DATA 40 IO USIM card data
signal
V
IL
max=0.25×SIM_VDD
VIHmin=0.75×SIM_VDD
VOLmax=0.15×SIM_VDD
V
OH
min=0.85×SIM_VDD
SIM_CLK 41 DO USIM card clock
signal
VOLmax=0.15×SIM_VDD
V
OH
min=0.85×SIM_VDD
SIM_GND 42 GND Specified
ground for
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USIM card
Antenna Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
RF_ANT 53 IO
RF antenna
interface
50Ω impedance.
BT_ANT* 8 IO BT antenna
interface
USB Interface
Pin Name Pin No. I/O Description DC Characteristics Comment
USB_
MODE 88 DI Boot mode selection
Pull this pin low to
implement USB
download function.
Suspended or pulled
up 10KΩ resistor to
3.3V for normal boot
mode.
USB_3V3 85 PI
USB power
supply Vnorm=3.3V
USB_DP 87 IO
USB differential
data (+) Conform to USB 1.1
specifications.
Request 90 Ω
differential
impedance.
USB_DM 86 IO
USB differential
data (-)
Bluetooth Interface*
Pin Name Pin No. I/O Description DC Characteristics Comment
VCC_BT*1PI
Bluetooth power
supply
Vnorm: 1.7V~3.6V
SWDIO_
BT*
3IO SWD Data
SWDCLK_
BT*
4DI SWD Clock
TXD_BT*5DO
Bluetooth
Transmit data to
DTE
RXD_BT*6DI Bluetooth
receive data
from DTE
RESET_BT*77 DI Bluetooth reset
BC950N-N1_Hardware_Design 18 / 59

LPWA Module Series
BC950N-N1 Hardware Design
1. Please keep all unused pins unconnected.
2. “*” means under development.
3.4. Operating Modes
3.4.1. Operating Modes of NB-IoT
The table below briefly describes various operating modes of the module’s NB-IoT section (AP and
Modem) and the entire module system.
Table 5: Operating Mode of AP
pin
GPIO1_BT*,
GPIO2_BT*,
GPIO3_BT*,
GPIO4_BT*
75, 76,
78, 79 IO
Reserved Pins
Pin Name Pin No. I/O Description DC Characteristics Comment
RESERVED
10~13,
16, 17,
22~25,
28,
31~33，
35~37,
44, 49,
50,
67~70,
80, 84,
89~91
Reserved Keep these pins
unconnected.
Mode Features
Operating
Mode
Normal Working state: in Normal mode, AP is processing tasks such as AT
command interaction, etc.
Idle Idle state: when all AP tasks are suspended, AP enters into Idle mode.
NOTES
BC950N-N1_Hardware_Design 19 / 59