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AUX_RXD
28
AUX_TXD
29
Debug UART Interface
Pin Name
Pin No.
DBG_RXD
38
DBG_TXD
39
RI Signal
Pin Name
Pin No.
RI
20
USIM Interface
Pin Name
Pin No.
USIM_VDD
14
USIM_RST
12
USIM_DATA
11
USIM_CLK
13
Antenna Interface
Pin Name
Pin No.
ANT_RF
35
Reserved Pins
Pin Name
Pin No.
RESERVED
2–6, 8, 21–23, 25, 26, 30–33, 44–58
BC65_Hardware_Design
Auxiliary UART
DI
receive
Auxiliary UART
DO
transmit
I/O
Description
Debug UART
DI
receive
Debug UART
DO
transmit
I/O
Description
DO
Ring indication
I/O
Description
USIM card power
PO
supply
DO
USIM card reset
IO
USIM card data
DO
USIM card clock
I/O
Description
Antenna
IO
interface
I/O
Description
DC Characteristics
DC Characteristics
DC Characteristics
Vnorm = 1.8/3.0 V
V
max = 0.1 × USIM_VDD
OL
V
min = 0.8 × USIM_VDD
OH
V
max = 0.2 × USIM_VDD
IL
V
min = 0.7 × USIM_VDD
IH
V
max = 0.1 × USIM_VDD
OL
V
min = 0.8 × USIM_VDD
OH
V
max = 0.1 × USIM_VDD
OL
V
min = 0.8 × USIM_VDD
OH
DC Characteristics
DC Characteristics
NB-IoT Module Series
BC65 Hardware Design
1.8 V power domain.
Comment
1.8 V power domain.
Comment
1.8 V power domain.
Comment
All signals of USIM
interface should be
protected against
ESD with a TVS
diode array.
Maximum trace
length from the
module pin to USIM
card connector is
200 mm.
Comment
50Ω impedance
control
Comment
Keep these pins
unconnected.
18 / 55
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