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MSM7580 数据表(PDF) 15 Page - OKI electronic componets

部件名 MSM7580
功能描述  ITU-T G.721 ADPCM TRANSCODER
PDF  18 Pages
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制造商  OKI [OKI electronic componets]
网页  http://www.oki.com
标志 OKI - OKI electronic componets

MSM7580 数据表(HTML) 15 Page - OKI electronic componets

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¡ Semiconductor
MSM7580
(3) PCMÆADPCM, ADPCMÆPCM during Transcode
(a) CODER Timing Diagram
123456
1234
78
MSB
LSB
MSB
LSB
Tsip
t4
A
PCM Input Data
PCM Output Data
104.2
ms
119.8
ms
t1
t2
MSB
LSB
LSB
MSB
t5
Tsoa
MSB
LSB
MSB
ADPCM Input Data
Tsia
t6
t7
t3
Tsop
B
65.2
ms
119.8
ms
t2
t0
*
* t5 is the rising edge of SYNCA.
* t7 is the rising edge of SYNCP.
SYNCA
SYNCP
BLCKP
SIP
Internal (1)
Timing (2)
Timing (3)
SOA
SYNCA
BCLKA
SIA
Internal (6)
SYNCP
Timing (4)
Timing (5)
SOP
t4 is the falling edge of the 8th BCLK
counted from the rising edge of SYNCP.
* t6 is the falling edge of the 4th BCLK
counted from the rising edge of SYNCA.
(b) DECODER Timing Diagram
(c) Internal Circuit Configuration
SIP
SYNCP
BCLKP
SOP
SOA
SYNCA
BCLKA
SIA
(1)
8bit
8bit
8bit
To CODER
From
DECODER
To
DECODER
From CODER
(2)
(5)
(3)
(4)
SYNCA
(6)
8bit
S
/
P
Latch
P
/
S
Latch
PLL
Latch
S
/
P
P
/
S
Latch



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