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QSLAC (LE58QL021BVC) Part
The QSLAC part converts the analog voice signal into Digital PCM data and performs the
following functions including gain adjustment and conversion of frequency characteristics.
The major features of the QSLAC part are as follows:
y
AC termination(2W Return Loss adjustment)
y
Voice signal gain/Frequency characteristics/4W Return Loss adjustment
y
CODE/DECODE
y
Time Slot Assignment function
The following figure shows the QSLAC block diagram:
Figure 2.7
Block Diagram of the QSLAC Part
Time Slot
Assigner
(TSA)
Clock&
Reference
Circuits
Signal Processing
Channel 1(CH 1)
VIN
1
VOUT
1
Signal Processing
Channel 2(CH 2)
VIN
2
VOUT
2
Signal Processing
Channel 3(CH 3)
VIN
3
VOUT
3
Signal Processing
Channel 4(CH 4)
VIN
4
VOUT
4
SLIC
Inteface
(SLI)
CO1
1
CO2
1
CO3
1
CO4
1
CO5
1
CO1
1
CO2
1
CO3
1
CO4
1
CO5
1
CO1
1
CO2
1
CO3
1
CO4
1
CO5
1
CO1
1
CO2
1
CO3
1
CO4
1
CO5
1
SLIC
Analog
VREF
DXA
DRA
TSCA
DXB
DRB
TSCB
Dual/Dingle
PCM
Highway6
CHCLK
FS
PCLX
MCLK/E1
Microprocessor Interface
(MPI)
RST
INT
CS
DIO
DCLK
Microprocessor
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