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On-Line Manuals
MCBSTM32E User's Guide
Introduction Setup 
Theory of Operation 
Block Diagram Schematics Technical Data Prototyping Area Microcontroller External Memory Power Supply Configuration JTAG Interface ETM Interface LCD Panel LEDs Push Buttons Joystick Potentiometer Speaker Serial Port CAN Interface USB Interface MicroSD Connector Writing Programs Example Programs STM32F10x Software LibrarySpeaker
The MCBSTM32E board includes a speaker controlled by the output of the on-chip D/A converter. The LM386M low voltage power amplifier (IC6) amplifies the D/A output to drive the speaker.
Jumper J3 connects the D/A output (Port A, pin 4) to the input of the LM386M amplifier. Removing this jumper disables the speaker.
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