MT9126AS Zarlink Semiconductor, MT9126AS Datasheet - Page 13

• 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
P
C
M
B
y
p
a
s
s
A
D
P
C
M
B
y
p
a
s
s
ADPCMi
ADPCMo
PCMi/o1
PCMi/o2
ADPCMi/o
ADPCMi/o
(16 kb/s)
PCMi/o1
PCMi/o2
32 kb/s
24 kb/s bit 4 = X
MCLK
F0i
ENB2/F0od
C2o
EN1 (output)
EN2 (output)
PCMi1
PCMo1
PCMi2
PCMo2
outputs = High impedance
inputs = don’t care
Figure 9 - ST-BUS PCM and ADPCM Bypass Relative Timing
0 1
0 1
0 1
0 1
0 1
0 1
0 1
0 1
D
D
D
D
D
D
SEL=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
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
C
C
C
C
C
C
SEL=1
1 2 3 4
1 2 3 4
B1
B3
1 2 3 4 1 2 3 4
B1
1 2 1 2 1 2 1 2
1 2 x x x x x x
1 2 x x x x x x
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
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
B1
B3
B1
SEL=0
B2
B1
B3
B1/B3
x x x x
x x x x
B3
B2
B4
B2
B4
1 2 3 4
1 2 3 4
1 2
B1 B2
1 2
1 2 1 2 1 2 1 2
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
1 2 3 4 1 2 3 4
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
B3
B2
B4
SEL=1
x x x x x x
x x x x x x
B4
B2
B2/B4
B3
x x x x
x x x x
B4
MT9126
B4
8-101