Connect To Mcu - Ebyte E32-868T20D User Manual

Chengdu Ebyte Electronic Technology Co,;Ltd
3 RXD
4 TXD
5
AUX
6
VCC
7
GND
8
Fixed orifice
9
Fixed orifice
10
Fixed orifice

4 Connect to MCU

No.
1 The UART module is TTL level.
2 For some MCU works at 5VDC, it may need to add 4-10K pull-up resistor for the TXD & AUX pin.
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（weak pull-up）
not used, could be grounded).
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can
Input
be configured as open-drain or pull-up input.
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can
Output
be configured as open-drain or push-pull output
To indicate module ' s working status & wakes up the external MCU.
Output During the procedure of self-check initialization, the pin outputs low
level. Can be configured as push-pull output (suspending is allowed).
Power supply ：2.3~ 5.2V DC
Input
Ground
Input
Fixed orifice
Fixed orifice
Fixed orifice
Description（STM8L MCU）
E32-868T20D user manual
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