Pin Name

Pin Description

5VNegative power supply

Meet5VNegative Power Supply (GND)

5VThe positive power supply

Meet5VThe positive power supply

TXD / IO0

IOTrigger mode as an input pinIO0;UARTUnder the control modeTXPins, connected to a control terminal (MCU)ofRX

RXD / IO1

IOTrigger mode as an input pinIO1; UARTUnder the control modeRXPins, connected to a control terminal (MCU)ofTX

IO2

IOTrigger mode input pinIO2

IO3

IOTrigger mode input pinIO3

IO4 / ONE_LINE

IOTrigger mode input pinIO4;One_LineSerial control line mode data receiving terminals

IO5

IOTrigger mode input pinIO5

IO6

IOTrigger mode input pinIO6

IO7

IOTrigger mode input pinIO7

BUSY

Playing tracks clear output (0V), Play end outputs a high level (3.3V)

GND

Ground reference terminal (control terminalGNDconnection)