Ebyte E30-TTL-100, Руководство пользователя

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SI4438 Wireless Module User Manual of E30 Series Modules
Copyright ©2012–2017, Chengdu Ebyte Electronic Technology Co., Ltd. 6 / 17
3.1.2 Pin Definition
Pin No. Pin item Pin direction Pin application
1 M0
Input
（weak pull-up）
Work with M1 & decide the four operating modes.
(Floating is not allowed, can be ground)
2 M1
Input
（weak pull-up）
Work with M0 & decide the four operating modes.
(Floating is not allowed, can be ground)
3 RXD Input
TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be configured as
open-drain or pull-up input.
4 TXD Output
TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can be configured as
open-drain or push-pull output
5 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
open-drain output or push-pull output. (Floating is allowed)
6 VCC Input Power supply 2.3V~5.5V DC
7 GND Input Ground
8 Fixing hole Fixing hole
9 Fixing hole Fixing hole
10 Fixing hole Fixing hole
3.2 E30-T100S2
3.2.1 Dimension