Chengdu Ebyte Electronic Technology Co.,Ltd.
Copyright ©2012–2019
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Chengdu Ebyte Electronic Technology Co.,Ltd.
5
3. Size and pin definition
Pin No.
Pin item
Pin direction
Application
1
M0
Input
（
weak pull-up
）
Work with M1 to decide 4 working modes of module (can be suspended, internal
pull-up resistor).
2
M1
Input
（
weak pull-up
）
Work with M0 to decide 4 working modes of module (can be suspended, internal
pull-up resistor).
3
RXD
Input
TTL UART input, connects to external TXD output pin.
