CMX138 CML Microcircuits, CMX138 Datasheet - Page 40

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

Audio Scrambler and Sub-Audio Signalling Processor
9.1.3
b15-14
For normal operation, these bits should both be set to 1 in both Rx and Tx modes.
b11-7
b1
b0
9.1.4
b15 enable Aux DAC
b14 reserved
b13 reserved
b12 RAMDAC enable
b11 reserved
b10 reserved
b9 – b0
2 Do NOT write to directly to AuxDAC whilst the RAMDAC is in operation. RAMDAC is only available when in Tx mode.
© 2008 CML Microsystems Plc
ENA
15
15
0
MOD Ramping Up
MOD Ramping Down
AuxADC and TX MOD mode - $A7 write
AuxDAC control / data - $A8 write
14
14
0
0
AuxDAC data (unsigned)
Tx MOD mode
reserved, clear to 0
reserved, clear to 0
13
13
0
b6
1
1
0
0
b4
1
1
1
1
0
0
0
0
Ram
DAC
12
12
b5
1
0
1
0
b3
1
1
0
0
1
1
0
0
11
11
0
0
AuxADC Averaging Mode
reserved
reserved
rolling average, uses Program Block 3.0 value
No averaging
b2
1
0
1
0
1
0
1
0
b13
1
1
0
0
10
10
0 = off
0 = off
0 = AuxDAC operates normally
0 = disable
1 = AuxDAC operates as a RAMDAC
0
0
AuxADC Input Select
reserved
reserved
reserved
reserved
reserved
reserved
AuxADC
off
b12
1
0
1
0
RAMDAC functions.
9
0
9
Tx MOD mode output
In-band + Sub-Audio
reserved
reserved
bias
Page 40
8
0
8
1 = enable
1 = enable
1 = enable
7
0
7
AUX DAC data / RAMDAC control
AuxADC AV
6
6
mode
5
5
2
. Data in b0-6 controls the
AuxADC ip select
4
4
3
3
2
2
D/138_FI1.0/5
RU
1
1
CMX138
RD
0
0