MT9126AS Zarlink Semiconductor, MT9126AS Datasheet - Page 10

• Manufacturer Part Number: MT9126AS
• Description: Description = Quad Adpcm (G.726) Transcoder ;; Package Type = Pdip ;; No. Of Pins = 28
• Manufacturer: Zarlink Semiconductor

MT9126
8-98
X = undetermined logic level output; don’t care input
Outputs high impedance outside of channel strobe boundaries
Two frame delay from data input to data output
BCLK
ENB1
ENB2/F0od
PCMi/o1
ADPCMo/i
PCMi/o2
PCMi/o1
ADPCM o/i
PCMi/o2
PCMi/o1
ADPCMo/i
PCMi/o2
Figure 6 - SSI PCM and ADPCM Bypass Relative Timing
7 6 5
1 2 1 2 1 2 1 2 1 2 1 2
7 6 5
7 6 5
1 2 3 4 1 2 3 4 1 2 3 4 1 2 3 4
B1
1 2 x
1 2 3
1 2 x
1 2 3
B3
B1
B3
B1
SEL = 0
B2 B3
4
4
4
x
4
x
4
B1
B3
3
3
3
x
x
x
x
2 1 0
2 1 0
2 1 0
x x x
x x x
x x x
x x x
SEL = 0
SEL = 1
B4 B1 B2 B3
7 6 5
7 6 5
7 6 5
1 2 3
1 2 x
1 2 x
B4
1 2 3
B2
B2
B4
SEL = 1
B2
4
B4
4
4
4
x
x
4
3
3
3
x
x
x
x
1 2 1 2
2 1 0
2 1 0
2 1 0
x x x
x x x
x x x
x x x
B4
32 kb/s using bits 1 2 3 4
24 kb/s where bit 4 = x
16 kb/s
SSI PCM
Bypass
SSI ADPCM
Bypass
Data Sheet