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LPM2100 bg NB Module Hardware Usage Guide
Debug serial interface
19
DBG_RXD
20
DBG_TXD
Secondary serial interface
27
RXD_AUX
28
TXD_AUX
22
CTS_AUX
23
RTS_AUX
Parameter
VIL
VIH
VOL
VOH
3.5.1 Serial application circuit
If you need to use a 4-wire serial port, you can refer to the following connection
methods:
If you need to use a 2-wire serial port, you can refer to the following serial port design.
Shanghai Yuge Information Technology Co., Ltd.
DI
Module debug data
reception
DO
Module debug data
transmission
DI
Data reception
DO
Data transmission
DI
Request to send
DO
Clear send
Table 3-7 Serial port logic levels
Minimum
0
0.7*VDD_EXT
0
0.7*VDD_EXT
Figure 3-8 Full-featured serial port design
Maximum
0.3*VDD_EXT
VDD_EXT
0.3*VDD_EXT
VDD_EXT
Debug serial port
Debug serial port
IO voltage domain
IO voltage domain
IO voltage domain
IO voltage domain
Unit
V
V
V
V
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