HF-BL200A Low Energy Bluetooh
(
BLE 4.1
)
Module User Manual
Shanghai High Flying Electronics Technology Co., Ltd www.hi-flying.com
- 49
-
A
PPENDIX A: UART TRANSPARENT TRANSMIT
TYPICAL APPLICATION
Figure 13.
UART Transparent Transmit Typical Application
XRES------module reset signal, input, low level valid
There is a pull-up resistor to VBAT, no need external pull up resistor. When module power on or
failure, MCU will reset the module, pull down at least 10 ms then pull-up.
BCTS------ Module UART output notify signal, output
(
wakeup external MCU, remind MCU
there is data output
)
Module will pull down BCTS, and delay Xms before output data; X set by external MCU via At
command, in default there is no latency. After sending data, BCTS pull-up, if there is new data
sending BCTS will pull-up after sending all the new data. .
WAKEUP------ UART wakeup enable, Stop Mode Wakeup,
(recommend to add external Pull-up
resistor)
Pin Mode: WAKEUP pin is high resistor input. Can
’t be suspended, can be controller by pull-up
or pull down or external MCU