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MSM7617 データシート(PDF) 12 Page - OKI electronic componets

部品番号 MSM7617
部品情報  2-Channel Echo Canceler
PDF  29 Pages
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メーカー  OKI [OKI electronic componets]
ホームページ  http://www.oki.com
Logo OKI - OKI electronic componets

MSM7617 データシート(HTML) 12 Page - OKI electronic componets

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¡ Semiconductor
MSM7617
Pin
Symbol
Type
Description
58
RIN2
I
PCM data input pin. Pin use changes depending on the setting of the IOM
pins (refer to the block diagram).
In 2-channel parallel I/O mode, this pin becomes RIN for channel 2 and
inputs the PCM signal synchronous with SYNC2. Data is captured on the
falling edge of SCK. In other modes, this pin is not used, and should be
fixed at "L".
59
ROUT2
O
PCM data output pin. Output signal changes depending on the setting of
the IOM pins (refer to the block diagram).
Data is always output on the rising edge of SCK. This pin becomes high
impedance while there is no data.
In 2-channel parallel I/O mode, this pin becomes ROUT for channel 2 and
outputs the PCM signal synchronous with SYNC2. In 2-channel serial I/O
mode, this pin is not used and should be left open. In 1-channel cross-
connected mode, this pin becomes the cross-connected ROUT pin for
channel 2, and outputs the PCM signal synchronous with SYNC1.
54
55
SA20
SA21
I
S input attenuator control pins for channel 2 (refer to the block diagram).
These pins attenuate the input level of SIN. Use them if ERL is large.
The attenuation level can be set even during the echo canceler disable mode.
56
57
SG20
SG21
I
S output gain control pins for channel 2 (refer to the block diagram).
These pins amplify the output level of SOUT. The gain level can be set even
during the echo canceler disable mode.
SG20
0
1
0
1
Attenuation Level
0 dB
–6 dB
–12 dB
Not used
SG20
0
1
0
1
Gain Level
0 dB
+6 dB
+12 dB
Not used
SA21
0
0
1
1
SG21
0
0
1
1
PIN DESCRIPTIONS (Continued)



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