MT9126AS Zarlink Semiconductor, MT9126AS Datasheet - Page 11

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

Data Sheet
X = undetermined logic level output; don’t care input
Outputs high impedance outside of channel boundaries
Two frame delay from data input to data output
ADPCMi
ADPCMo
F0i
ENB2/F0od
C2o (output)
EN1 (output)
EN2 (output)
MCLK (C4)
PCMi1
PCMo1
PCMi2
PCMo2
outputs=High impedance
inputs = don’t care
Figure 7 - ST-BUS 8-bit Companded PCM Relative Timing
0 1
0 1
0 1
0 1
transparent relay of D- and C- channels
D
D
In 24 kb/s, bit 4 becomes “X”
32 kb/s is shown
when ENB1=0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
16 kb/s
SEL operates for
16 kb/s only
C
C
7 6 5 4
7 6 5 4
7 6 5 4
7 6 5 4
1 2 3 4
1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2
1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2
1 2 3 4
B1
B1 B2
B1
B2
SEL=0
B1
B3
3 2 1 0
3 2 1 0
3 2 1 0
3 2 1 0
1 2 3 4
B3
1 2 3 4
B3
B2
B4
B4
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
1 2 3 4 1 2 3 4
1 2 3 4 1 2 3 4
B1 B2
B1 B2
B3
SEL=1
B4
B2
B3
B3
MT9126
B4
B4
B4
8-99