UM0501

Demonstration applications

Doc ID 14320 Rev 3

15/23

2.10

BEEPER demo

This mode demonstrates the 3 different frequencies that can be output on the BEEP pin.

Prior to running the BEEPER demo, perform the following operations.

●

Install the JP14 jumper in the top position (closer to the STM8S chip).

●

Enable the beep output functionality by setting bit AFR7 of OPT2 option byte to ‘1’

(refer to the datasheets for details).

When this mode is entered, the LSI clock is calibrated.

The message shown in Figure 14 is displayed at the end of calibration.

Figure 14.

End of calibration message

After a short time, another message shows the current output frequency.

Press the KEY button repeatedly to change the frequency in this order.

1kHz

2kHz

4kHz

1-2-4 kHz

OFF

1 kHz etc...

The frequency selected is displayed on the LCD screen (see Figure 15)

The LEDs also change depending on the selected frequency.

Figure 15.

Selecting the beep frequency

UP: Press the joystick UP to exit the demo.

KEY: Press the KEY button to change the beeper frequency.

Calibration

OK

BEEPER 1kHz

Press KEY