I/O Input Specification; I/O Output Specification - DFRobot DFPLayer Mini Manual

DFPLayer Mini
6、Note*
Item Description
VIL Low-Level Input Voltage
VIH High-Level Input Voltage
Item Description
VOL Low-Level Output Voltage
VOH High-Level Output Voltage
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.

I/O Input Specification

Min Type
-0.3 -
0.7VDD -

I/O Output Specification

Min Type
- -
2.7 -
Max Unit Test Condition
0.3*VDD V
VDD+0.3 V
Max Unit Test Condition
0.33 V
- V
VDD=3.3V
VDD=3.3V
VDD=3.3V
VDD=3.3V