Keil Logo


The MCB2470 board includes a speaker controlled by the output of the on-chip D/A converter, and the volume control (R51). The LM386M low voltage power amplifier (U2) amplifies the D/A output to drive the speaker.

The D/A output (Port 0, pin 26, P0.26/AOUT) is connected to the input of the LM386M amplifier via R51 allowing the D/A output to control the gain of this amplifier and the volume of the speaker.

MCB2470 Board Speaker

  Arm logo
Important information

This site uses cookies to store information on your computer. By continuing to use our site, you consent to our cookies.

Change Settings

Privacy Policy Update

Arm’s Privacy Policy has been updated. By continuing to use our site, you consent to Arm’s Privacy Policy. Please review our Privacy Policy to learn more about our collection, use and transfers
of your data.