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MT9126AS Datasheet(PDF) 9 Page - Mitel Networks Corporation

Part # MT9126AS
Description  CMOS Quad ADPCM Transcoder
Download  22 Pages
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Manufacturer  MITEL [Mitel Networks Corporation]
Direct Link  http://www.mitel.com
Logo MITEL - Mitel Networks Corporation

MT9126AS Datasheet(HTML) 9 Page - Mitel Networks Corporation

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Preliminary Information
MT9126
8-41
Figure 4 - SSI 8-Bit Companded PCM Relative Timing
Figure 5 - SSI 16-Bit Linear PCM Relative Timing
ADPCM i/o
BCLK
ENB1
ENB2/F0od
PCMi/o1
ADPCM i/o
SEL = 0
SEL = 1
32 kb/s
24 kb/s
16 kb/s
SEL for 16 kb/s only
B1
B2
PCMi/o2
1234
B1
B2
12 3x
B1
B2
12
B3
B4
12 12
12 1212 12 12
765
3
4
210
B3
B4
1234
1 23x
1234
B3
B4
123 x
1234
12 3x
B1
B2
B3
B4
765
3
4
210
765
3
4
210 765
3
4
210
X = undetermined logic level output; don’t care input
Two frame delay from data input to data output
Outputs high impedance outside of channel strobe boundaries
ENB1
ENB2/F0od
EN1
ADPCM i/o
ADPCMi/o
B
1
1234 1234 1234 1234
123x 123x 123x 123x
12
SEL = 1
SEL = 1
SEL = 0
BCLK
...
SEL for 16 kb/s only
(2.048 MHz only)
PCMi/o1
PCMi/o2
SSS 12 11 10 9 8 7 6 5 4 3 2 1 0
SSS 12 11 10 9 8 7 6 5 4 3 2 1 0
SSS 12 11 10 9 8 7 6 5 4 3 2 1 0
B1
B2
S = 3 bits sign extension
µ−Law is 13 bit 2’s complement data (bits 0 -12)
A-Law is 12 bit 2’s complement data (shifted left once and utilizing
bits 1 - 12, bit 0 not defined)
32 kb/s
24 kb/s
16 kb/s
B3
B4
SSS 12 11 10 9 8 7 6 5 4 3 2 1 0
Notes:
B
2
B
3
B
4
12 12 12
B
1
12
B
2
B
3
B
4
12 12 12
B1
B2
B3
B4
1234 1234
123x 123x
B3
B4
B
1
12
B
2
B
3
B
4
12 12 12
X = undetermined logic level output; don’t care input
Two frame delay from data input to data output
Outputs high impedance outside of channel strobe boundaries


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