CMX138 CML Microcircuits, CMX138 Datasheet - Page 45

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

ADC
Audio Scrambler and Sub-Audio Signalling Processor
9.1.10 AuxADC threshold data - $B5 write
b15 AuxADC select
b14 high / low select
b13 reserved
b12 reserved
b11 reserved
b10 reserved
b9 –b0
9.1.11 Power Down Control - $C0 write
b15 DISC input / gain block enable 0 = off
b14 MIC input / gain block enable 0 = off
b13 Input amp enable
b12 AUD gain block enable
b11 MOD gain block enable
b10 AUD output enable
b9
b8
b7
b6
b5
b4
b3
b2
b1
b0
Note: Care should be taken when writing to b5 and b3. These are automatically programmed to an
operational state following a power-on (ie: all 0’s). Writing a 1 to either b5 or b3 will effectively cause the
device to cease all processing activity, including responding to other C-BUS commands (except General
Reset, $01).
When b5 is set, the device will be held in reset and all signal processing will cease (including AuxADC
operation.
When b3 is set the Xtal is disabled. When b3 is subsequently cleared, it may take some time for the clock
signal to become stable, hence care should be taken in using this feature.
© 2008 CML Microsystems Plc
sel
15
DISC
input
15
reserved
MOD output enable
reserved
BIAS block enable
Reset
Program Block Protect
XTAL disable
DISC bypass gain
MIC bypass gain
reserved
Hi /Lo
14
input
MIC
14
threshold data
If cleared, the Program Blocks will be initialised on Power on or Reset. If set, then the Program
Blocks will retain their previous contents.
Setting this bit effectively stops all signal processing within the device.
13
Input
0
ena
13
12
AUD
gain
0
12
11
MOD
gain
0
11
0 = AuxADC
0 = low threshold
0
0
0
0
10
AUD
0
ena
10
0 = off
0 = off
0 = off
0 = off
must be cleared to 0
0 = off
must be cleared to 0
0 = normal
0 = disabled / powersave 1 =enabled
0 = disabled / powersave 1 =enabled
must be cleared to 0
0 = off
0 = normal
0 = enabled
9
9
0
MOD
8
ena
Page 45
8
1 = reserved – do not use
1 = high threshold
1 = enabled
1 = enabled
1 = enabled
1 = enabled
1 = enabled
1 = enabled
1 = enabled
1 = enabled
1 = reset / powersave
1 = protected
1 = disabled / powersave
7
7
0
BIAS Reset
Aux ADC threshold data
6
6
5
5
Prot
4
4
XTAL
3
DIS
3
bypass
DISC
2
2
D/138_FI1.0/5
bypass
MIC
1
1
CMX138
0
0
0