msm7586-01 Oki Semiconductor, msm7586-01 Datasheet - Page 35

• Manufacturer Part Number: msm7586-01
• Description: Shift Qpsk Modem/adpcm Codec
• Manufacturer: Oki Semiconductor

• MSM7586-03
¡ Semiconductor
(3) CRC2 (PCM CODEC Unit Operation Mode Settings and Transmit/Receive Gain Adjustment)
• MSM7586-01
The above gain settings table shows the transmit/receive voice signal gain settings and the
transmit side gain settings for DTMF tones and other tones. Tone signal transmission is enabled
by CRC4 - B6 (discussed later), and the gain setting is set to the levels shown below.
For example, if the transmit gain set value is set to +8 dB (B6, B5, B4) = (1, 1, 1), then the following
tones appear at the PCMSO pin.
CRC2
Initial Value
B6
B6
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
DTMF tones (low group): ................................. –16 dBm0
DTMF tones (high group) and other tones: ... –14 dBm0
DTMF tones (low group): ................................. –8 dBm0
DTMF tones (high group) and other tones: ... –6 dBm0
B5
B5
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
B7: .............. Transmit side PCM signal ON/OFF 0: ON 1: OFF
B6, B5, B4: Transmit side signal gain adjustment (refer to Table 6)
B3: .............. Receive side PCM signal ON/OFF 0: ON 1: OFF
B2, B1, B0: .Receive side signal gain adjustment (refer to Table 6)
B4
B4
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
ON/OFF
B7
TX
0
When OFF, transmits a PCM idle pattern.
When OFF transmits a PCM idle pattern.
Transmit Side Gain
Transmit Side Gain
Table 6: Receive/Transmit Gain Settings
GAIN2
B6
TX
0
–6 dB
–4 dB
–2 dB
+2 dB
+4 dB
+6 dB
+8 dB
–6 dB
–4 dB
–2 dB
+2 dB
+4 dB
+6 dB
+8 dB
0 dB
0 dB
GAIN1
B5
TX
1
GAIN0
B2
B2
B4
TX
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
1
B1
B1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
ON/OFF
B3
RX
0
B0
B0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
GAIN2
B2
RX
0
Receive Side Gain
Receive Side Gain
MSM7586-01/03
GAIN1
–12 dB
–6 dB
–4 dB
–2 dB
+2 dB
+4 dB
+6 dB
+8 dB
–9 dB
–6 dB
–3 dB
+3 dB
+6 dB
+9 dB
B1
RX
0 dB
0 dB
1
GAIN0
B0
RX
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