User's Manual

HF-BL100-CU Low Energy Bluetooh（BLE 4.0）Module User Manual
Shanghai High Flying Electronics Technology Co., Ltd www.hi-flying.com - 58
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APPENDIX A: UART TRANSPARENT
TRANSMIT TYPICAL APPLICATION
Figure 16. 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
UART Wakeup Enable: when WAKEUP is pull-up, all system enter into DEEPSLEEP ; when
WAKEUP is pull-down, system enter into SLEEP mode. When sending data from external MCU to