Data Sheet

Shenzhen Waytronic Electronics Co., Ltd. WT2003S-16S Chip
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6
GND
I
Ground
7
RESET
I
RESET pull down to release SPI-FLASH
8
SPI-CLK
I/O
SPI communication port CLK
9
SPI-DATA
I/O
SPI communication port DATA
10
SPI-CS
I/O
SPI communication port CS
11
DM
O
USB data port
12
DP
I
USB data port
13
ADKEY
I
Key extended port
14
BUSY
I
BUSY signal(status indicator light)
15
RXD
I
UART serial port RXD receive
16
TXD
PWP
UART serial port TXD send
Note: Power output port VDDIO can not supply power for external device, only for connection with
pull-up resistor and other low power consumption device.
2.3. Function introduction
2.3.1. Key control mode
Key
Operation
Function and operation
K1
Short press
Play/pause
K2
Short press
Choose the next file
K3
Short press
Choose the previous file
K4
Short press
Stop
2.3.2. UART control protocol
2.3.3. Protocol command format
WT2003S is built in standard UART asynchronous serial interface, belonging to 3.3V TTL level
interface that can be converted to RS232 level through MAX3232 chip.
Communication data format: 1start bit, 8 data bits, no parity bit, 1stop bit. Using computer serial
debugging assistant needs to correctly set the serial port parameters, as shown in Figure: