CMX138 CML Microcircuits, CMX138 Datasheet - Page 43

• Manufacturer Part Number: CMX138
• Description: Audio Scrambler and Sub-Audio Signalling Processor
• Manufacturer: CML Microcircuits

Audio Scrambler and Sub-Audio Signalling Processor
9.1.8
b15 to 11 reserved – clear to 0
b7 to 6 are reserved - clear to 0
b5 DISCselect:
Note that b1, b0 of this register control the routing of the signal to the processing blocks, whereas b1, b0
of the Mode register ($C1) control the processing functions of the device. BOTH registers MUST be set
appropriately for the device to operate correctly in Rx or Tx modes.
© 2008 CML Microsystems Plc
15
0
Analogue Input Gain - $B0 write
14
0
13
0
b10
b4
0
0
0
0
1
1
1
1
0 – select DISCN1 input only
1 – select DISCN2 input (does NOT disconnect DISCN1 input)
12
0
b9
b3
0
0
1
1
0
0
1
1
11
0
b1
0
0
1
1
b8
b2
0
1
0
1
0
1
0
1
10
DISC input gain
b0
0
1
0
1
9
Page 43
8
DISC Input Gain
MIC Input Gain
Rx / Tx
7
0
Idle
Idle
Rx
Tx
12.8dB
16.0dB
19.2dB
22.4dB
3.2dB
6.4dB
9.6dB
0dB
6
0
select
DISC
5
4
MIC input gain
3
2
D/138_FI1.0/5
1
CMX138
Rx / Tx
0