Data Sheet
Shenzhen Waytronic Electronics Co., Ltd. WT2003S-16S Chip
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2.4.3. Key control circuit
Remark: 1. VDDLDO is the only power input pin, input voltage 2.8V-5.5V.
2. VDDIO is the chip internal LDO output 3.3V, available to supply power for those with low
power consumption, such as SPI, SD card, single chip pull-up etc..
3. I/O port of chip is 3.3V. 5V single chip microcomputer communication. If there need to be
communication between 5V single chip and WT2003S-16S, 470R resistance can be used to reduce
voltage.
4. The ADK pin of chip has to connect to a 10k pull-up resistor, the power of chip needs to
connect to a capacitance for output/ input to the ground.
2.5. Audio file sorting
Can connect to the computer through USB. There will be a removable drive on computer. First, format
the drive into FAT or FAT32 system.
WT2003S audio file is sorted by the file index. It is sorted by the sequential order that the file was put
into the reservoir instead of the file name. So when WT2003S is playing file in index, the sort order is not
related to the file name.
For the file sorting of Windows system is sorted by file name usually. Thus, we suggest naming files
in number + file name (for example, 0001 Ode to the Motherland. mp3, 0002 Story of Spring. mp3). It is