msm7719-01 Oki Semiconductor, msm7719-01 Datasheet - Page 10

• Manufacturer Part Number: msm7719-01
• Description: Echo Canceler With Adpcm Transcoder
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Note: The PCM signals (PCMADI and PCMADO) of the ADPCM transcoder can be assigned to
SYNCP/SYNCA
BCLKP/BCLKA
PCM multiplexing
PCMADI/O data
(DTHR="0")
PCMADI/O data
(DTHR="1")
PCMLNI/O data
PCMACI/O data
(DTHR="0")
PCMLNI/O data
PCMACI/O data
(DTHR="1")
IR/IS data
(CONTA="1")
IR/IS data
(CONTA="0")
SYNCP
BCLKP
CR2-B3, B2
(c)
Output Control
time slot 1 or 2.
The PCM signals (PCMLNI, PCMLNO, PCMACI, and PCMACO) of the echo canceler can
be assigned to one of the time slots 1 to 4.
The ADPCM signals (IR and IS) of the ADPCM transcoder are always assigned to time slot
1.
PCMLNO
(c)
(c)
MSB
MSB
MSB
MSB
MSB
MSB
Input Control
PCMLNI
1 2 3 4 5 6 7 8
1 2 3 4
1 2 3 4 5 6 7 8
1 2 3 4
1 2 3 4 5 6 7 8
1 2 3 4
Line
Echo
Canceler
(27ms)
time slot 1
SYNCP
BCLKP
CR2-B1, B0
Figure 5 PCM Multiplexing/ADPCM Timing
(c)
Input Control
PCMACI
Figure 4 Signal I/O Control 4
1
1 2 3 4
1
1 2 3 4
(c)
Output Control
(c)
PCMACO
2 3 4 5 6 7 8
2 3 4 5 6 7 8
time slot 2
(c)
Output Control
PCMADO
(c)
1 2 3 4 5 6 7 8
1 2 3 4
(c)
Input Control
PCMADI
time slot 3
IOSL1="1", IOSL0="1"
Control (a): ECMODE, CR0-B0
Control (b): CONTA, CR1-B7
Control (c): DTHR, CR1-B5
Acoustic
Echo
Canceler
(27ms)
SYNCA
BCLKA
CR2-B4
(b)
1
ADPCM
Transcoder
2 3 4 5 6 7 8
time slot 4
(b)
Input Control
IR
MSM7719-01
Output Control
(b)
(c)
(b)
IS
10/40
SYNCA
BCLKA