User's Manual

Copyright ©2012–2020，Chengdu Ebyte Electronic Technology Co.,Ltd
5
NO.
Item
Direction
Function
Remark
1
GND
Input
Ground
2
VL-
--
Low voltage power
supply
/
3
VCC
Input
VCC
Short-circuiting to pin 4 “VH+”
4
VH+
Input
VH+
Short-circuiting to pin 3“VCC”
5
GND
Input
Ground
6
GND
Input
Ground
7
RST
Input
Reset pin
Reset in low level（take effective in 500ms）
8
DIO
1
Input
SWDIO
SWDIO，JTAG interface
9
NC
--
NC
/
10
CLK
Input
SWCLK
SWCLK，JTAG interface
11
NC
--
NC
/
12
GND
Input
Ground
Ground
13
WKP
Input
Wake up pin
Wake up：falling edge；Sleep：rising edge
14
TXD
Output
UART
UART output
15
RXD
Input
UART
UART Input
16
LINK
Output
Link status
Linked：high level
Not linked：low level
17
DATA
Output
Data
Data indication pin
Note:
Receive Bluetooth data:
When the DATA pin has Bluetooth data in the air to send out
through the TXD pin of BT52, the pin will be pulled high. After a
frame of data is sent, the pin will be pulled low again.
Send Bluetooth data:
After the DATA pin receives the data on the RXD pin of BT52,
the buffer BUFF size is 2K. As long as there is data in the BUFF
that has not been sent out via Bluetooth, the DATA will be pulled
high. It will be pulled low again until the data transmission in the
BUFF is completed. The user can use the above description to do
data framing.
18
GND
Input
Ground
Ground