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IDT821054 Datasheet PDF : 45 Pages
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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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