msm7731-01 Oki Semiconductor, msm7731-01 Datasheet - Page 31

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

¡ Semiconductor
(3) CR2 (Receive side level control)
B7, B6 ... Reserved bits
B5, B4, B3, B2, B1, B0 ...... Receive side level setting (RPAD)
CR2
Initial value
These bits adjust the receive signal gain and set the mute level. Notice that only
the mute level setting differs from pin control.
When using this register, set the RPAD4, 3, 2, 1 pins to a logic "0".
B7
—
0
B6
—
0
(0, 0, 1, 0, 1, 0):
(0, 0, 1, 0, 0, 1):
(0, 0, 1, 0, 0, 0):
(0, 0, 0, 1, 1, 1):
(0, 0, 0, 1, 1, 0):
(0, 0, 0, 1, 0, 1):
(0, 0, 0, 1, 0, 0):
(0, 0, 0, 0, 1, 1):
(0, 0, 0, 0, 1, 0):
(0, 0, 0, 0, 0, 1):
(0, 0, 0, 0, 0, 0):
(1, 1, 1, 1, 1, 1):
(1, 1, 1, 1, 1, 0):
(1, 1, 1, 1, 0, 1):
(1, 1, 1, 1, 0, 0): –12 dB
(1, 1, 1, 0, 1, 1): –15 dB
(1, 1, 1, 0, 1, 0): –18 dB
(1, 1, 1, 0, 0, 1): –21 dB
(1, 1, 1, 0, 0, 0): –24 dB
(1, 1, 0, 1, 1, 1): –27 dB
(1, 1, 0, 1, 1, 0): –30 dB
(1, 1, 0, 1, 0, 1): –33 dB
(1, 1, 0, 1, 0, 0): –36 dB
(1, 1, 0, 0, 1, 1): –39 dB
(1, 1, 0, 0, 1, 0): –42 dB
(1, 1, 0, 0, 0, 1): –45 dB
(1, 1, 0, 0, 0, 0): –48 dB
(1, 0, 1, 1, 1, 1): –51 dB
(1, 0, 1, 1, 1, 0): –54 dB
(1, 0, 1, 1, 0, 1): –57 dB
(1, 0, 1, 1, 0, 0): –60 dB
(1, 0, 1, 0, 1, 1): MUTE
RPAD6
B5
0
Modification of initial values is inhibited
RPAD5
B4
0
30 dB
27 dB
24 dB
21 dB
18 dB
15 dB
12 dB
–3 dB
–6 dB
–9 dB
9 dB
6 dB
3 dB
0 dB
RPAD4
B3
0
RPAD3
B2
0
RPAD2
B1
0
MSM7731-01
RPAD1
31/43
B0
0