Mechanical Dimensions And Pin Definitions; E22-230/400/900T30D Mechanical Dimensions And Pin Definitions - Ebyte E22 T30D Series User Manual

Chengdu Ebyte Electronic Technology Co., Ltd.

3. Mechanical dimensions and pin definitions

3.1 E22-230/400/900T30D mechanical dimensions and pin definitions

Pin number Pin name
1 M0
2 M1
3 RXD
4 TXD
5 AUX
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Pin direction
Input (very weak Work with M1 to decide 4 working modes of the module (cannot be left floating; can
pull-up) be grounded if not used).
Input (very weak Work with M0 to decide 4 working modes of the module (cannot be left floating; can
pull-up) be grounded if not used).
TTL serial port input, connected to the external TXD output pin;
Input
Can be configured as open-drain or pull-up input, see parameter settings for details.
TTL serial port output, connected to the external RXD input pin;
Output Can be configured as open-drain or push-pull output, see parameter settings for
details.
Used to indicate the working status of the module;
For user to wakes up the external MCU and it outputs low level during power-on
Output
self-check initialization;
It can be configured as an open-drain output or push-pull output, see parameter
E22-xxxT30x series product user manual
Pin usage
10