User's Manual

BT-MC55-JKX规格书
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3.6
注意事项 NOTICE PROCEEDING
3.6.1 串口 UART
蓝牙核心模组工作电压是 3.3V，对于串口通信信号线的 UART_TX, UART_RX 设计，请按以下要求
配合模块设计电路：
The core module of Bluetooth works at 3.3V. For the circuit design of serial communication signal line
UART_TX and UART_RX, you can fulfill it according to follow suggestions
1.如果主机 MCU 是 5V 工作，需增加电平匹配电路；
If the host MCU works at 5V, it is necessary to increase the level matching circuit;
2．如果主机 MCU 是 3.3V 工作，则也需增加串接 470R-1K 电阻匹配设计,避免出现电压不匹配工
作损坏蓝牙的串口；
If the host MCU works at 3.3V , you also need to add threaded 470R-1K resistor matching design to
avoid the damage to the serial interface caused by the voltage not matching ;
4.
可靠性测试 RELIABILITY TEST