ml2215 Oki Semiconductor, ml2215 Datasheet - Page 21

• Manufacturer Part Number: ml2215
• Description: Speech Synthesizer Plus Music Lsi With On-chip 3 Mbit Mask Rom
• Manufacturer: Oki Semiconductor

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.
1 Semiconductor
OUTPUT MD
OUTPUT MD
OUTPUT MD
Figure 9.1 Output Wave-form from the Buzzer Driver in Each Output Mode
OUTPUT MD
BUSYB
BUSYB
BUSYB
BUSYB
STOP
STOP
32 Hz
STOP
STOP
8 Hz
1 Hz
8 Hz
OFF
OFF
OFF
OFF
ON
ON
ON
ON
(b) TP1 = 0, TP0 = 1 (intermittent 2)
(a) TP1 = 0, TP0 = 0 (intermittent 1)
(c) TP1 = 1, TP0 = 0 (single)
(d) TP1 = 1, TP0 = 1 (continuous)
FEDL2215-01
ML2215
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