msm7732a Oki Semiconductor, msm7732a Datasheet - Page 20

• Manufacturer Part Number: msm7732a
• Description: Audio Codec
• Manufacturer: Oki Semiconductor

B7, B6, B5
B4
B3, B2, B1, B0
The tone generator gain setting table for the receive side, as shown in Table 4, depends upon the following
reference levels.
For example, when selecting –6 dB (B3, B2, B1, B0) = (1, 1, 1, 1) as a tone generator gain, the signal amplitude of
each DTMF tone on SAO or VFRO is as follows:
OKI Semiconductor
CR3 (Side tone and other tone generator gain setting)
Initial Value
CR3
B3
0
0
0
0
0
0
0
0
B2
DTMF tones (low group):
DTMF tones (high group) and other tones:
DTMF tones (low group):
DTMF tones (high group) and other tones:
0
0
0
0
1
1
1
1
Side tone path gain setting, refer to Table 3.
Tone generator enable; 0/Disable, 1/Enable
Tone generator gain adjustment for receive side, refer to Table 4.
Side Tone
B1
0
0
1
1
0
0
1
1
GAIN2
B7
0
B0
0
1
0
1
0
1
0
1
Side Tone
Tone Generator Gain
GAIN1
B6
B7
0
0
0
0
0
1
1
1
1
–34 dB
–32 dB
–30 dB
–28 dB
–26 dB
–24 dB
–22 dB
OFF
B6
Side Tone
0
0
1
1
0
0
1
1
GAIN0
B5
0
B5
0
1
0
1
0
1
0
1
Table 3
Table 4
ON/OFF
TONE
B3
1
1
1
1
1
1
1
1
Side Tone Path Gain
B4
0
–2 dBm0
–8 dBm0
–6 dBm0
B2
0 dBm0
0
0
0
1
1
1
1
0
–15 dB
–13 dB
–11 dB
–9 dB
–7 dB
–5 dB
–3 dB
OFF
GAIN3
TONE
B1
B3
0
0
1
1
0
0
1
1
0
B0
0
1
0
1
0
1
0
1
GAIN2
TONE
Tone Generator Gain
B2
0
–20 dB
–18 dB
–16 dB
–14 dB
–12 dB
–10 dB
–8 dB
–6 dB
GAIN1
TONE
B1
0
FEDL7732A-01-01
MSM7732A-01
GAIN0
TONE
B0
0
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