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IDT821054 QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE
INDUSTRIAL TEMPERATURE RANGE
TABLE OF CONTENTS
1
Pin Description...................................................................................................................................................................................................7
2
Functional Description ......................................................................................................................................................................................9
2.1
MPI/PCM Interface ....................................................................................................................................................................................9
2.1.1
Microprocessor Interface (MPI) ....................................................................................................................................................9
2.1.2
PCM Bus ....................................................................................................................................................................................10
2.2
DSP Programming...................................................................................................................................................................................11
2.2.1
Signal Processing.......................................................................................................................................................................11
2.2.2
Gain Adjustment.........................................................................................................................................................................11
2.2.3
Impedance Matching ..................................................................................................................................................................11
2.2.4
Transhybrid Balance ..................................................................................................................................................................12
2.2.5
Frequency Response Correction................................................................................................................................................12
2.3
SLIC Control ............................................................................................................................................................................................12
2.3.1
SI1 and SI2.................................................................................................................................................................................12
2.3.2
SB1, SB2 and SB3 .....................................................................................................................................................................12
2.3.3
SO1 and SO2 .............................................................................................................................................................................12
2.4
Hardware Ring Trip .................................................................................................................................................................................12
2.5
Interrupt and Interrupt Enable..................................................................................................................................................................12
2.6
Debounce Filters .....................................................................................................................................................................................13
2.7
Chopper Clock.........................................................................................................................................................................................13
2.8
Dual Tone and Ring Generation..............................................................................................................................................................13
2.9
FSK SIGNAL GENERATION...................................................................................................................................................................14
2.10 Level Metering .........................................................................................................................................................................................15
2.11 Channel Power Down/Standby Mode......................................................................................................................................................16
2.12 Power Down/Suspend Mode ...................................................................................................................................................................16
3
Operating The IDT821054................................................................................................................................................................................17
3.1
Programming Description ........................................................................................................................................................................17
3.1.1
Command Type and Format ......................................................................................................................................................17
3.1.2
Addressing the Local Registers..................................................................................................................................................17
3.1.3
Addressing the Global Registers................................................................................................................................................17
3.1.4
Addressing the Coe-RAM...........................................................................................................................................................17
3.1.5
ADDRESSING FSK-RAM...........................................................................................................................................................18
3.1.6
Programming Examples .............................................................................................................................................................18
3.1.6.1 Example of Programming Local Registers .................................................................................................................18
3.1.6.2 Example of Programming Global Registers................................................................................................................18
3.1.6.3 Example of Programming the Coefficient-RAM..........................................................................................................18
3.1.6.4 Example of Programming the FSK-RAM....................................................................................................................19
3.2
Power-on Sequence ................................................................................................................................................................................21
3.3
Default State After Reset.........................................................................................................................................................................21
3.4
Registers Description ..............................................................................................................................................................................22
3.4.1
Registers Overview ....................................................................................................................................................................22
3.4.2
Global Registers List ..................................................................................................................................................................24
3.4.3
Local Registers List ....................................................................................................................................................................31
4
Absolute Maximum Ratings ............................................................................................................................................................................35
5
Recommended DC Operating Conditions .....................................................................................................................................................35
6
Electrical Characteristics ................................................................................................................................................................................35
6.1
Digital Interface........................................................................................................................................................................................35
6.2
Power Dissipation....................................................................................................................................................................................35
6.3
Analog Interface ......................................................................................................................................................................................36
7
Transmission Characteristics.........................................................................................................................................................................37
7.1
Absolute Gain ..........................................................................................................................................................................................37
7.2
Gain Tracking ..........................................................................................................................................................................................37
7.3
Frequency Response ..............................................................................................................................................................................37
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