CMX649 CML Microcircuits, CMX649 Datasheet - Page 14

• Manufacturer Part Number: CMX649
• Description: ADM Codec
• Manufacturer: CML Microcircuits

DECODER
MODE AND
SETUP
DECODE ADM
CONTROL (1)
DECODE VAD
THRESHOLD
DECODE OFF-
SET LEVEL (1)
DECODE
LINEAR PCM
INPUT
DECODE ADM
INPUT
ENCODER
MODE AND
SETUP
ENCODE ADM
CONTROL (1)
ENCODE VAD
THRESHOLD
ENCODE OFF-
SET LEVEL (1)
REGISTER
ADM Codec
NAME
2003 CML Microsystems Plc
(1)
(1)
(1)
(2)
(1)
(2)
(2)
(2)
(2)
(1)
(2)
(2)
(2)
(2)
ADDRESS/
COMMAN
HEX
$D0
$D1
$D2
$D3
$D7
$D8
$E0
$E1
$E2
$E3
D
DEC BY
DEC BY
BIT 7
(D7)
VAD Decay Time Constant
VAD Decay Time Constant
4/8
4/8
Principal Time Constant
Principal Time Constant
Syllabic Time Constant
Syllabic Time Constant
Estimator Integrator
Estimator Integrator
BIT 6
(D6)
Select PCM IN
Select PCM IN
Voice Activity Detector Threshold Setting Bits 15 - 8
Voice Activity Detector Threshold Setting Bits 15 - 8
Voice Activity Detector Threshold Setting Bits 7 - 0
Voice Activity Detector Threshold Setting Bits 7 - 0
BIT 5
(D5)
Direct Write to DAC Input Bits 15 - 8
14
Direct Write to DAC Input Bits 7 – 0
Offset Input Level Bits 15 - 8
Offset Input Level Bits 15 - 8
Offset Input Level Bits 7 – 0
Offset Input Level Bits 7 – 0
2
2
Decode ADM Input
Dynamic Range for Step Size
Dynamic Range for Step Size
BIT 4
VAD Attack Time
nd
VAD Attack Time
nd
(D4)
Select ADM IN
Time Constant
Select ADM IN
Time Constant
Order Estimator
Order Estimator
Constant
Constant
Integrator
Integrator
BIT3
(D3)
Select VAD Output
Select VAD Output
Zero location for
Zero location for
BIT 2
Decoder Output
(D2)
Local Decoder
Output Select
Integration
Integration
2
2
Source
Source
nd
nd
Select
Order
Order
Companding Rule
Companding Rule
BIT 1
(D1)
CMX649
D/649/2
ADM
Output
Select
Dec Zero
Dec Zero
Enhance
Channel
BIT 0
(D0)
Idle
0
0