Manual

DFPLayer Mini

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Note*

I/O Input Specification

Item Description Min Type Max Unit Test Condition

VIL Low-Level Input Voltage -0.3 - 0.3*VDD V VDD=3.3V

VIH High-Level Input Voltage 0.7VDD - VDD+0.3 V VDD=3.3V

I/O Output Specification

Item Description Min Type Max Unit Test Condition

VOL Low-Level Output Voltage - - 0.33 V VDD=3.3V

VOH High-Level Output Voltage

2.7 - - V VDD=3.3V

1. The module's external interfaces are 3.3V TTL level, so please note the level conversion during the

hardware circuit design, also in strong interference environment, electromagnetic compatibility note some

protective measures, GPIO using opt coupler isolation, increasing TVS etc.

2, ADKEY key values are in accordance with the general use of the environment, if the strong inductive or

capacitive load environment, please note that the module power supply is recommended to use a separate

isolated power supply, another matched beads and inductors for power filtering, we must ensure that the

input power as much as possible the stability and clean. If you really can not be guaranteed, please contact

us to reduce the number of keys to redefine wider voltage distribution.

3. For general Serial communication, please pay attention to level conversion. If strong interference

environment, or long distance RS485 applications, then please note that signal isolation, in strict

accordance with industry standard design communication circuits.