Ebyte E22-400T22S1C, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co., Ltd. E22-400T22S1C User manual
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd.
8
No. Name Direction Function
1 GND Ground
2 GND Ground
3 GND Ground
4 GND Ground
5 M0
Input
（weak pull-up）
Work with M1 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
6 M1
Input
（weak pull-up）
Work with M0 to decide 4 working modes of module (not suspended, if not
used, could be grounded).
7 RXD Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be
configured as open-drain or pull-up input.
8 TXD Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be
configured as open-drain or push-pull output
9 AUX Output
To indicate module ’ s working status & wakes up the external MCU.
During the procedure of self-check initialization, the pin outputs low level.
Can be configured as push-pull output (suspending is allowed).
10 VCC Power supply ：2.3~ 5.2V DC
11 GND Ground
12 NRST Input Module reset pin, low reset
13 GND Ground
14 NC
15 NC
16 NC
17 NC
18 NC
19 GND Ground
20 GND Ground
21 ANT Antenna
22 GND Ground