MSM7584C View Datasheet(PDF) - Oki Electric Industry
Part Name
Description
MFG CO.
'MSM7584C' PDF : 57 Pages View PDF
¡ Semiconductor
MSM7584C
(4) CR3 (Side Tone and Tone Generator Gain Adjustment)
CR3
Initial Value
B7
B6
B5
Side Tone Side Tone Side Tone
GAIN2 GAIN1 GAIN0
0
0
0
B4
TONE
ON/OFF
0
B3
TONE
GAIN3
0
B2
TONE
GAIN2
0
B1
TONE
GAIN1
0
B0
TONE
GAIN0
0
B7, B6, B5: ........ Side tone gain adjustment (refer to Table 5)
B4: ..................... Tone generator ON/OFF 0: OFF 1: ON
B3, B2, B1, B0: . Tone generator
Receive side gain adjustment (refer to Table 6)
Table 5 Side Tone Gain Settings
B7 B6 B5
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
Side Tone Gain
OFF
–15 dB
–13 dB
–11 dB
–9 dB
–7 dB
–5 dB
–3 dB
Table 6 Receive Side Tone Generator Gain Settings
B3 B2 B1 B0 Tone Generator Gain B3 B2 B1 B0 Tone Generator Gain
0
0
0
0
–32 dB
1
0
0
0
–16 dB
0
0
0
1
–30 dB
1
0
0
1
–14 dB
0
0
1
0
–28 dB
1
0
1
0
–12 dB
0
0
1
1
–26 dB
1
0
1
1
–10 dB
0
1
0
0
–24 dB
1
1
0
0
–8 dB
0
1
0
1
–22 dB
1
1
0
1
–6 dB
0
1
1
0
–20 dB
1
1
1
0
–4 dB
0
1
1
1
–18 dB
1
1
1
1
–2 dB
The receive side tone generator gain settings shown in Table 6 are set with the following levels
as a reference.
DTMF tones (low group): ................................. –2 dBm0
DTMF tones (high group) and other tones: ... 0 dBm0
For example, if the tone generator gain set value is set to –6 dB (B3, B2, B1, B0)=(1, 1, 0, 1), then
tones at the following levels appear at the SAO+/SAO– or VFRO pin.
DTMF tones (low group): ................................. –8 dBm0
DTMF tones (high group) and other tones: ... –6 dBm0
–3 dBm0 (mixed tone)
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