msm7581 Oki Semiconductor, msm7581 Datasheet - Page 16

• Manufacturer Part Number: msm7581
• Description: Itu-t G.721 4ch Adpcm Transcoder
• Manufacturer: Oki Semiconductor

(3) PCMÆADPCM, ADPCMÆPCM during Transcode
(a) CODER Timing Diagram
(b) DECODER Timing Diagram
(c) Internal Circuit Configuration
¡ Semiconductor
SYXA
SYXP
BCKP
SIP
Internal (1)
Timing (2)
Timing (3)
SOA
SYRA
BCKA
SIA
Internal (6)
SYRP
Timing (4)
Timing (5)
SOP
SIP
SYXP
BCKP
SYRP
SOP
MSB
LSB
1
MSB
LSB
2
3
S
P
P
S
/
/
4
8bit
8bit
(1)
t0
5
MSB
ADPCM Input Data
Latch
Latch
T
6
1
MSB
sip
T
65.2ms
sop
To CODER
From
DECODER
T
7
2
sia
(2)
(5)
104.2ms
119.8ms
119.8ms
8
3
LSB
LSB
t4
T
soa
t7
t3
4
LSB
PLL
t6
From CODER
PCM Input Data
To
DECODER
SYXA
B
PCM Output Data
t1
(3)
(4)
A
t2
t2
Latch
Latch
MSB
t5
MSB
8bit
8bit
(6)
P
S
S
P
/
/
*
* t5 is the rising edge of SYXA.
* t6 is the falling edge of the 4th BCLK
* t7 is the rising edge of SYRP.
t4 is the falling edge of the 8th BCLK
counted from the rising edge of SYXP.
counted from the rising edge of SYRA.
SOA
SYXA
BCKA
SYRA
SIA
MSM7581
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