msm7570l-01 Oki Semiconductor, msm7570l-01 Datasheet - Page 21

• Manufacturer Part Number: msm7570l-01
• Description: Multi-function Adpcm Codec Msm7570l-01/02multi-function Adpcm Codec
• Manufacturer: Oki Semiconductor

¡ Semiconductor
(4) CR3 (Side tone and other tone generator gain setting)
B7, B6, B5 ... Side tone path gain setting, refer to Table-3.
B4 ... Tone generator enable;
B3, B2, B1, B0 ... Tone generator gain adjustment for receive side, refer to Table-4
The tone generator gain setting table for the receive side, as shown in Table-4, depends upon the
following reference level.
For example, when selecting –6 dB (B3, B2, B1, B0) = (1, 1, 1, 1) as a tone generator gain, each DTMF
tone signal amplitude on SAO+/SAO– or VFRO is as follows.
CR3
Initial Value
B3
0
0
0
0
0
0
0
0
B2
0
0
0
0
1
1
1
1
B1
0
0
1
1
0
0
1
1
DTMF low-group tones ................................ –2 dBm0
DTMF high-group tones and others ............ 0 dBm0
DTMF low-group tone .................................. –8 dBm0
DTMF high-group tone or other tones ....... –6 dBm0
Side. Tone
GAIN2
B7
0
B0
0
1
0
1
0
1
0
1
B7
Tone Generator Gain
0
0
0
0
1
1
1
1
Side. Tone
GAIN1
B6
0
B6
0/Disable, 1/Enable
0
0
1
1
0
0
1
1
–36 dB
–34 dB
–32 dB
–30 dB
–28 dB
–26 dB
–24 dB
–22 dB
Side. Tone
GAIN0
B5
0
1
0
1
0
1
0
1
B5
0
Table-3
Table-4
Side Tone Path Gain
ON/OFF
TONE
B3
B4
1
1
1
1
1
1
1
1
0
–21 dB
–19 dB
–17 dB
–15 dB
–13 dB
–11 dB
–9 dB
B2
OFF
0
0
0
0
1
1
1
1
GAIN3
TONE
B3
0
B1
0
0
1
1
0
0
1
1
GAIN2
TONE
B0
B2
0
1
0
1
0
1
0
1
0
Tone Generator Gain
MSM7570L-01/02
GAIN1
TONE
B1
0
–20 dB
–18 dB
–16 dB
–14 dB
–12 dB
–10 dB
–8 dB
–6 dB
GAIN0
TONE
B0
21/26
0