2
Agere Systems Inc.
Preliminary Data Sheet
September 2001
T8535B/T8536B Quad Programmable Codec
Table of Contents
Contents
Page
Features ....................................................................................................................................................................1
Description.................................................................................................................................................................1
General Description...................................................................................................................................................4
Pin Information ..........................................................................................................................................................5
Functional Description.............................................................................................................................................13
Clocking Considerations .......................................................................................................................................13
The Control Interface ............................................................................................................................................13
Modes ................................................................................................................................................................13
Protocol..............................................................................................................................................................14
Write Command .................................................................................................................................................16
Read Command.................................................................................................................................................18
Fast Scan Mode.................................................................................................................................................20
Write All Channels..............................................................................................................................................23
Reset Functionality ...............................................................................................................................................23
Memory Control Mapping...................................................................................................................................24
Standby Mode.......................................................................................................................................................24
Test Capabilities ...................................................................................................................................................24
SLIC Control Capabilities......................................................................................................................................24
Suggested Initialization Procedures......................................................................................................................25
Signal Processing .................................................................................................................................................25
Absolute Maximum Ratings.....................................................................................................................................26
Operating Ranges ...................................................................................................................................................26
Handling Precautions ..............................................................................................................................................26
Electrical Characteristics.........................................................................................................................................27
dc Characteristics .................................................................................................................................................27
Analog Interface....................................................................................................................................................28
Gain and Dynamic Range.....................................................................................................................................29
Noise Characteristics............................................................................................................................................31
Distortion and Group Delay...................................................................................................................................32
Crosstalk...............................................................................................................................................................33
Timing Characteristics.............................................................................................................................................34
Control Interface Timing........................................................................................................................................34
Serial Control Port Timing..................................................................................................................................34
Normal Mode......................................................................................................................................................35
Byte-by-Byte Mode.............................................................................................................................................35
PCM Interface Timing ...........................................................................................................................................36
Single-Clocking Mode ........................................................................................................................................36
Double-Clocking Mode.......................................................................................................................................38
Software Interface ...................................................................................................................................................40
Applications.............................................................................................................................................................44
Outline Diagrams.....................................................................................................................................................45
100-Pin TQFP.......................................................................................................................................................45
68-Pin PLCC.........................................................................................................................................................46
64-Pin TQFP.........................................................................................................................................................47
44-Pin PLCC.........................................................................................................................................................48
Ordering Information................................................................................................................................................49