Neoway N75 - Figure 3-19 Recommended Level Shifting Circuit 2

N75
Hardware User Guide
Copyright © Neoway Technology Co., Ltd
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Figure 3-19 Recommended level shifting circuit 2
C336
10kΩ
10kΩ
4.7kΩ
VDD_1P8
4.7kΩ
220pF
47kΩ
4.7kΩ
Q310
Q309
R349
R352
R347
R348
R351
R350
C335
10kΩ
R342
4.7kΩ
2.2 kΩ
220pF
47kΩ
4.7kΩ
Q307
Q308
R345
R346
R343
R341
R344
47kΩ
UART_RXD
UART_TXD
MCU_RXD
MCU_TXD
VDD_1P8
VCC_IO
MCU_TXD and MCU_RXD are respectively the TX and RX of the MCU while UART_TXD and
UART_RXD are respectively the TX and RX of the module. VCC_IO is the IO voltage of the MCU.
Level shift chip is recommended if the level of MCU is larger than 3.3V or the baudrate is higher than
1 MHz.