Quectel BG96 Manual page 41

VDD_EXT
RI
DCD
CTS
RTS
DTR
TXD
RXD
Please visit http://www.ti.com for more information.
Another example with transistor translation circuit is shown as below. For the design of circuits in dotted
lines, please refer to that of circuits in solid lines, but please pay attention to the direction of connection.
NOTE
Transistor circuit solution is not suitable for applications with high baud rates exceeding 460Kbps.
BG96_Hardware_Design
VCCA
0.1uF
120K
OE
A1
A2
A3
A4
A5
A6
A7
51K
A8
Figure 16: Reference Circuit with Translator Chip
VDD_EXT
MCU/ARM
TXD
RXD
10K
VCC_MCU
RTS
CTS
GPIO
EINT
GPIO
GND
Figure 17: Reference Circuit with Transistor Circuit
VCCB
0.1uF
GND
B1
B2
Translator
B3
B4
B5
B6
B7
B8
4.7K
VDD_EXT
1nF
10K
1nF
VDD_EXT
4.7K
LPWA Module Series
BG96 Hardware Design
VDD_MCU
RI_MCU
DCD_MCU
CTS_MCU
RTS_MCU
DTR_MCU
TXD_MCU
RXD_MCU
51K
Module
RXD
TXD
RTS
CTS
DTR
RI
DCD
GND
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