FEASYCOM Bluetooth module : Data Sheet : Page 11

FSC-BT956B Datasheet

Shenzhen Feasycom Technology Co., Ltd www.feasycom.com

Configurable gain for audio input and output path, gains control is implemented in both digital and analog.

Flexible audio/voice path mixing/loopback.

4.2.2 Microphone Input & line IN

Check the Application Schematic for the microphone input & line IN design.

If need to use Microphone & Line IN simultaneously, please refer to the Analog Characteristics introduction.

4.2.3 SPEAKER

Check the Application Schematic for the microphone input & line IN design.

Please refer to the Analog Characteristics introduction.

4.3 Reset

The module may be reset from several sources: Power-on Reset (POR), Low level on the nRESET Pin (nRST), Debug

Reset, Watchdog time-out reset (WDT), Global soft reset.

POR

Entire SoC is reset after power supply ramping from 0v to VDD.

External Pin Reset

Entire SoC is reset except PMU.

Warm Reset

Global soft reset

DBB can be reset by set soft reset register in system control register map.

Watch Dog Reset

DBB will be reset when watch dog timer expired.

Debug Reset

DBB will be reset through debug host set its internal register

4.4 General Purpose Digital IO

There are 14 general purpose digital IOs defined in the module. All these GPIOs can be configured by software to

realize various functions, such as button controls, LED drives or interrupt signals to host controller, etc. Do not connect

them if not use.

The I/O type of each I/O pins can be configured by software individually as Input or Push-pull output mode. After the

chip is reset, the I/O mode of all pins is input mode with no pull-up and pull-down enable. Each I/O pin has an

individual pull-up and pull-down resistor which is about 40 kΩ ~ 50 kΩ for VDD and Vss.

Two I/O modes: a: Push-Pull Output mode b: Input only with high impendence mode

CMOS/Schmitt trigger input selectable

I/O pin can be configured as interrupt source with edge setting

I/O pin has individual internal pull-up resistor and pull-down resistor

Enabling the pin interrupt function will also enable the wake-up function