Ebyte E28-2G4T27SX, Руководство пользователя

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Chengdu Ebyte Electronic Technology Co.,Ltd. E28-2G4T27SX User Manual
Copyright ©2012–2020, Chengdu Ebyte Electronic Technology Co., Ltd.
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3.2. Pin Definition
Pin No. Pin Name Pin Direction Function
1 GND Ground Ground
2 NC - cannot be floated, can be grounded if not used
3 NC - cannot be floated, can be grounded if not used
4 NC - cannot be floated, can be grounded if not used
5 NC - cannot be floated, can be grounded if not used
6 NC - cannot be floated, can be grounded if not used
7 NC - cannot be floated, can be grounded if not used
8 GND Ground Ground
9 NC - cannot be floated, can be grounded if not used
10 GND Ground Ground
11 VCC -
Module power source positive reference.
Voltage range: 2.5V ~ 5.5V DC
12 AUX Input
Used to indicate the module operation status, when user wakes up the
external MCU,it outputs low level during initialization after power on
and self-check, can be configured as open-drain output or push-pull
output, please refer to Parameter Configuration.
(can be floated)
13 TXD Output
TTL serial input, connected to external TXD output pin. Can be
configured as open-drain or pull-up input, please refer to Parameter
Configuration.
14 RXD Output
TTL serial input, connected to external TXD output pin;
It can be configured as drain open circuit or pull-up input. See parameter
setting for details
15 M1 Input
M2 、 M1 、 M0 共同组合决定模块 8 种工作模式
M2, M1 and M0 determine eight working modes
16 M0 Input M2, M1 and M0 determine eight working modes
17 M2 Input M2, M1 and M0 determine eight working modes
18 GND Ground Ground
19 ANT - Antenna interface (50 Ω characteristic impedance)
20 GND Ground Ground
21 GND Ground Ground
22 NC - cannot be floated, can be grounded if not used