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SM8230A Datasheet(PDF) 7 Page - NEC

Part # SM8230A
Description  Tone Dialer with Built-in Piezo Driver
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Manufacturer  NEC [NEC]
Direct Link  http://www.nec.com/
Logo NEC - NEC

SM8230A Datasheet(HTML) 7 Page - NEC

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SM8230A
SEIKO NPC CORPORATION —7
GH/GL command (GH3 to GH0, GL3 to GL0)
These bits set the output levels of the high-frequency group and low-frequency group outputs, respectively. The
input code and the corresponding output level are shown in table 4. Note that the 0dB point is typically 93% of
the supply voltage. Any value above 0dB results in amplitude clipping of the output waveform.
Table 4. GH/GL command
GH3/GL3
GH2/GL2
GH1/GL1
GH0/GL0
Output level
0000
−9dB
0001
−8dB
0010
−7dB
0011
−6dB
0100
−5dB
0101
−4dB
0110
−3dB
0111
−2dB
1000
−1dB
1001
0dB
1010
1dB
1011
2dB
1100
3dB
1101
4dB
1110
5dB
1111
6dB


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