msm7731-01 Oki Semiconductor, msm7731-01 Datasheet - Page 14

• Manufacturer Part Number: msm7731-01
• Description: Multifunction Pcm Codec Voice Signal Processor
• Manufacturer: Oki Semiconductor

¡ Semiconductor
RPAD4, RPAD3, RPAD2, RPAD1
These are the receive signal gain adjusting and mute setting pins. Refer to Table 1 for the
settings. Set these pins to a logic "0" when controlling by the control register. Because data is
shifted into this pin in synchronization with the rising edge of the SYNC signal, hold the data
at the pin for 250 ms or longer. For further details, refer to the electrical characteristics.
TPAD4, TPAD3, TPAD2, TPAD1
These are the transmit signal gain adjusting and mute setting pins. Refer to Table 1 for the
settings. Set these pins to a logic "0" when controlling by the control register. Because data is
shifted into this pin in synchronization with the rising edge of the SYNC signal, hold the data
at the pin for 250 ms or longer. For further details, refer to the electrical characteristics.
TEST1-4, 8
Test inputs. Set these pins to a logic "0".
TEST9
Test output.
RPAD4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
RPAD3
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
RPAD2
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
Table 1 RPAD/TPAD Settings
RPAD1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
TPAD4
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
TPAD3
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
TPAD2
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
TPAD1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
MSM7731-01
–12 dB
–15 dB
–18 dB
–21 dB
Level
MUTE
21 dB
18 dB
15 dB
12 dB
–3 dB
–6 dB
–9 dB
9 dB
6 dB
3 dB
0 dB
14/43