CMX649 CML Microcircuits, CMX649 Datasheet - Page 8

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

ADM Codec
5.1.3 Transcoding with the Encoder and Decoder
(note that the decoder also can be configured to do this function and in this example
(note that the encoder can also be configured to do this function and in this example
all data is read and written via C-BUS registers $EA ($DA) and $E7 ($D7) respectively (for decoder))
all data is read and written via C-BUS registers $D6 ($E6) and $D8 ($E8) respectively (for encoder))
2003 CML Microsystems Plc
DECODER
DECODER
INPUT
OUT
OUT
+
-
REG $D6
OUTPUT
REG $D6
OUTPUT
PCM
PCM
Figure 7 PCM to ADM transcoding with Encoder
Figure 8 ADM to PCM transcoding with Decoder
OUTPUT
REG $E6
PCM
REG $D7
+
REG $D7
+
INPUT
INPUT
PCM
PCM
PCM TO ADM TRANSCODE FEEDBACK
PCM TO ADM TRANSCODE FEEDBACK
+
REG $E7
INPUT
PCM
PCM TO ADM TRANSCODE FEEDBACK
Figure 6 PCM Decoding
1
1
st
st
ENCODER FEEDBACK
ESTIMATOR INTEGRATORS
ESTIMATOR INTEGRATORS
DECODE
REG $D0
1
DECODE
REG $D0
SETUP
SETUP
st
OFFSET NULLING
OFFSET NULLING
ESTIMATOR INTEGRATORS
REGS $D3 & $D5
REGS $D3 & $D5
ENCODE
REG $E0
SETUP
OFFSET NULLING
REGS $E3 & $E5
8
ADM CTL
ADM CTL
REG $D1
REG $D1
2
2
ADM CTL
nd
nd
REG $E1
2
nd
PCM OUT
LINEAR
PCM IN
LINEAR
x
x
x
REGISTER
REGISTER
REGISTER
DELAY
DELAY
DELAY
PROGRAMMABLE
PROGRAMMABLE
PROGRAMMABLE
STEP SIZE
CONTROL
STEP SIZE
CONTROL
STEP SIZE
CONTROL
REG $E8
INPUT
ADM
REG $DA
REG $D8
OUTPUT
REG $DA
REG $D8
OUTPUT
REG $EA
OUTPUT
INPUT
INPUT
ADM
ADM
ADM
ADM
ADM
CMX649
ADM OUT
D/649/2
LINEAR
PCM IN
ADM IN
LINEAR
PCM IN
ADM IN