Product characteristics
Support sampling rate (KHz): 8/11.025/12/16/22.05/24/32/44.1/48
Support the IO trigger play function. 8 IO ports trigger 8 tracks individually or 8 IO ports trigger 255 tracks in combination
Support for One_ Line single bus serial port control, can control playback, pause, music selection, volume increase and decrease and other functions
Support 3 configured IOs for up to 7 operating modes
Module size: 26mm * 23mm

Pin definition
TXD/IO0: input pin IO0 in IO trigger mode; TX pin in UART control mode, connecting RX of control terminal (MCU)
RXD/IO1: Input pin IO1 in IO trigger mode; RX pin in UART control mode, connected to TX of control terminal (MCU)
IO2: IO trigger mode input pin IO2
IO3: IO trigger mode input pin IO3
IO4/ONE_ LINE: IO trigger mode input pin IO4; One_ Line 1 serial port control mode data receiving pin
IO5: IO trigger mode input pin IO5
IO6: IO trigger mode input pin IO6
IO7: IO trigger mode input pin IO7
GND: reference ground terminal
CON1: Mode configuration pin 1
CON2: Mode configuration pin 2
CON3/BUSY: used as mode configuration pin within 30ms after power-on, 3/30ms later as BUSY signal output, high level (3.3V) is output when playing tracks, and low level (0V) is output after playing
V5: 5V power supply positive input
V33: 3.3V power output, maximum 80mA
DACR: right channel audio output
DACL: left channel audio output
SPK-: 5W power amplifier output negative, connected to the negative pole of the horn
SPK+: 5W power amplifier output positive, connected to horn positive

IO input and output characteristics
IO input characteristics
VIL low level input: 0V - 0.8V
VIH high level input: 2.7V - 3.3V
IO output characteristics
VoL low level output: 0V - 0.33V
VoH high-level output: 2.7V - 3.3V