DX-BT19-S 蓝牙技术手册
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2
UART_TX
Serial data output
3
UART_CTS
NC
4
UART_RX
Serial data input
5
P2_1
Debug data port
6
P2_2
Debug clock port
7
SCL
Clock port
8
SDA
Data port
9
VCC
3.3 V
10
NC
NC
11
RESETB
Low level reset, at least 5ms
12
GND
Land
13
P1_1
Bluetooth connection indicator (not connected low,
connection high)
14
P1_0
Programmable input and output port
15
P1_2
LED light pin
16
P1_3
SW1 system button,
9
.
Detailed description of function pins:
1. P15 pin (P1_2): LED indicator pin
·
Used to indicate the status of the Bluetooth module. Correspondence between the LED
flashing mode and the Bluetooth module status is shown in the following table:
Mode
LED Display
Module Status
Slave module
Uniformly slow flashing (800ms-on, 800ms-off)
standby mode
Long bright
Connection Status
Main module
Evenly flashing (300ms-on,300ms-off)
Search and connect
Long bright
Connection Status
2.
P13 pin (P1_1): connection status indicator
Pin state
Module status
Output low level
standby mode
Output high level
Connection Status
3.
P16 pin (P1_3): connection interrupt pin (module is in the connected state)
Pin state
Module status
No action
Connection Status