ml7029 Oki Semiconductor, ml7029 Datasheet - Page 18

• Manufacturer Part Number: ml7029
• Description: Multifunction Adpcm Codec
• Manufacturer: Oki Semiconductor

(4) CR3 (Side tone gain setting)
B7, B6, B5: Side tone path gain setting. Refer to Table 3.
B4 to B2: Not used (These pins are used to test the device. They should be set to “0” during normal operation.)
B1:
B0:
For the frequency characteristics, refer to Figures 9 to 12 in the Reference Data.
OKI Semiconductor
Initial Value
CR3
Transmit HPF cut-off frequency select;
0/The cut-off frequency of the transmit HPF is the sampling frequency × 0.0275.
When SYNC = 8 kHz: 220 Hz, when SYNC = 11.025 kHz: 300 Hz.
The transmit frequency characteristics are not guaranteed when selecting SYNC = 11.025 kHz.
1/The cut-off frequency of the transmit HPF is the sampling frequency × 0.0200.
When SYNC = 8 kHz: 160 Hz, when SYNC = 11.025 kHz: 220 Hz.
The transmit frequency characteristics are not guaranteed when selecting SYNC = 8 kHz.
Transmit HPF ON/OFF;
Side Tone
GAIN2
Table 3 Side Tone Pash Gain Setting (when SYNC = 8 kHz)
B7
0
Side Tone
GAIN1
B7
0
0
0
0
1
1
1
1
B6
0
Side Tone
0/ON, 1/OFF
B6
GAIN0
0
0
1
1
0
0
1
1
B5
0
B5
0
1
0
1
0
1
0
1
B4
—
*
Side Tone Path Gain
–21 dB
–19 dB
–17 dB
–15 dB
–13 dB
–11 dB
–9 dB
B3
—
OFF
*
B2
—
*
8k/11k
HPF
B1
0
FEDL7029-03
ON/OFF
ML7029
HPF
B0
0
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