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IDT821054A QUAD PROGRAMMABLE PCM CODEC WITH MPI INTERFACE INDUSTRIAL TEMPERATURE
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 Level Metering .........................................................................................................................................................................................14
2.10 Channel Power Down/Standby Mode......................................................................................................................................................14
2.11 Power Down/Suspend Mode ...................................................................................................................................................................14
3 Operating The IDT821054A .............................................................................................................................................................................15
3.1 Programming Description ........................................................................................................................................................................15
3.1.1 Command Type and Format ......................................................................................................................................................15
3.1.2 Addressing the Local Registers..................................................................................................................................................15
3.1.3 Addressing the Global Registers................................................................................................................................................15
3.1.4 Addressing the Coe-RAM...........................................................................................................................................................15
3.1.5 Programming Examples .............................................................................................................................................................16
3.1.5.1 Example of Programming Local Registers .................................................................................................................16
3.1.5.2 Example of Programming Global Registers................................................................................................................16
3.1.5.3 Example of Programming the Coefficient-RAM..........................................................................................................16
3.2 Power-on Sequence ................................................................................................................................................................................19
3.3 Default State After Reset.........................................................................................................................................................................19
3.4 Registers Description ..............................................................................................................................................................................20
3.4.1 Registers Overview ....................................................................................................................................................................20
3.4.2 Global Registers List ..................................................................................................................................................................22
3.4.3 Local Registers List ....................................................................................................................................................................28
4 Absolute Maximum Ratings............................................................................................................................................................................32
5 Recommended DC Operating Conditions .....................................................................................................................................................32
6 Electrical Characteristics ................................................................................................................................................................................32
6.1 Digital Interface........................................................................................................................................................................................32
6.2 Power Dissipation....................................................................................................................................................................................32
6.3 Analog Interface ......................................................................................................................................................................................33
7 Transmission Characteristics .........................................................................................................................................................................34
7.1 Absolute Gain ..........................................................................................................................................................................................34
7.2 Gain Tracking ..........................................................................................................................................................................................34
7.3 Frequency Response ..............................................................................................................................................................................34
7.4 Group Delay ............................................................................................................................................................................................35
7.5 Distortion .................................................................................................................................................................................................35
7.6 Noise .......................................................................................................................................................................................................36
