User's Manual

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6
unit: mil
PIN Description
NO PIN
INPUT\
OUTPUT
Description
1 EN I
Enabled Pins，External Pull up：
Falling Edge：Module starts Broadcasting, and connect with device
Raising Edge：No matter what status of the module, the module will
enter into deep sleep mode. （420 nA）
2 TX O UART TX
3 RX I UART RX
4 — — Not used
5 — — Not used
6 CTS O
Input signal to wake up MCU (Optional)
0：Means module’s sending data to MCU , Master’s ready to receive
data from Module
1：Means no data sending to MCU, or Module data sending Finished
7 RTS I
Data output request to wake up module
0：Means MCU will send data out, and Module is waiting for the data
from MCU
1：Means no data sending to module, or MCU data sending finished
8 FLOW_CTR O
UART Flow Control：
0：UART can send data to module
1：Module is busy, UART can’t send data to Module
Note：TO Prevent UART data from losing, suggest to check the pin
status before MCU sending data, waiting for a falling edge , then send
data out ( wait for no longer than a broadcasting or an interval ) , see
the Chart 3-1 for reference.
9 GND — Power Ground
10 VCC —
Power Supply’
Positive（3 ~ 3.6V）
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