FEDL2215-01
Semiconductor
ML2215
1
9. Buzzer
You can define a buzz phrase by setting a frequency and sound type in the Phrase Control Table and a buzz phrase
in the User’s Data area. To start buzzer output via the MD pin, activate a buzz phrase. To stop buzzer output, enter
the Stop Code.
4 buzzing sound types, intermittent 1, intermittent 2, single and continuous, and 3 50%-duty frequencies, at 0.5
kHz, 1.0 kHz and 2.0 kHz, are available for user selection, depending on buzzer output mode setup in the Phrase
Control Table.
Figure 9.1 shows output wave-form in respective output modes. Black-filled wave-form indicates buzz output
signal at 0.5/1.0/2.0 kHz.
STOP
BUSYB
8 Hz
ON
OUTPUT MD
OFF
(a) TP1 = 0, TP0 = 0 (intermittent 1)
STOP
BUSYB
8 Hz
1 Hz
ON
OUTPUT MD
OFF
(b) TP1 = 0, TP0 = 1 (intermittent 2)
STOP
BUSYB
32 Hz
ON
OUTPUT MD
OFF
(c) TP1 = 1, TP0 = 0 (single)
STOP
BUSYB
ON
OUTPUT MD
OFF
(d) TP1 = 1, TP0 = 1 (continuous)
Figure 9.1 Output Wave-form from the Buzzer Driver in Each Output Mode
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