CMX649E3 CML Microcircuits, CMX649E3 Datasheet - Page 17

• Manufacturer Part Number: CMX649E3
• Description: ADM Codec
• Manufacturer: CML Microcircuits

ENCODE VAD
OFFSET LEVEL
OUTPUT
ENCODE
LINEAR PCM
OUTPUT
ENCODE ADM
OUTPUT
REGISTER
ADM Codec
5.2.1
GENERAL RESET ($01)
The reset command has no data attached to it. Application of the GENERAL RESET sets all write only
register bits to 0.
AAF/AIF BANDWIDTH Register ($61)
AAF Bypass
(Bit 7)
AAF Bandwidth
(Bits 6 – 4)
AIF Bypass
(Bit 3)
AIF Bandwidth
(Bits 2 – 0)
NAME
2002 CML Microsystems Plc
(1)
(1)
(2)
(2)
Write Only Register Description
ADDRESS/
COMMAN
HEX
$EA
$E5
$E6
D
When this bit is set to logic 1 the anti-alias filter is bypassed.
The –3dB cutoff frequency of the anti-alias filter is controlled by bits 4 – 6. The filter
shape is not altered other than to move the cutoff frequency. The transfer function is
a 6
When this bit is set to a logic 1 the anti-image filter is bypassed.
The –3dB cutoff frequency of the anti-image filter is controlled by bits 0-2. The filter
shape is not altered other than to move the cutoff frequency. The transfer function is
a 6
th
th
order Butterworth lowpass.
order Butterworth lowpass.
BIT 7
(D7)
Bit 6
0
0
0
0
1
1
1
1
BIT 6
(D6)
Bit 5
0
0
1
1
0
0
1
1
Bit 4
BIT 5
(D5)
0
1
0
1
0
1
0
1
Linear PCM Output Signal Bits 15 - 8
Linear PCM Output Signal Bits 7 - 0
17
Offset Level Output Bits 15 - 8
Offset Level Output Bits 7 - 0
-3dB Frequency
Encode ADM Output
BIT 4
(D4)
10.0kHz
14.0kHz
14.0kHz
14.0kHz
2.9kHz
3.7kHz
5.0kHz
7.0kHz
BIT3
(D3)
BIT 2
(D2)
BIT 1
(D1)
CMX649
D/649/1
BIT 0
(D0)