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參數(shù)資料
| 型號(hào)： | T7531A |
| 廠商： | Lineage Power |
| 元件分類： | Codec |
| 英文描述： | 16-Channel Programmable Codec Chip Set(十六通道可編程編解碼器芯片組) |
| 中文描述： | 16通道可編程解碼器芯片組（十六通道可編程編解碼器芯片組） |
| 文件頁數(shù)： | 2/44頁 |
| 文件大?。?/td> | 772K |
| 代理商： | T7531A |
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2
Lucent Technologies Inc.
Data Sheet
February 1999
Codec Chip Set
T7531A/T7536 16-Channel Programmable
Table of Contents
Contents
Page
Features ..................................................................... 1
General Description.................................................... 1
T7536 Description.................................................... 4
T7531A Description ................................................. 5
Pin Information ........................................................... 7
Chip Set Functional Description............................... 12
Transmit Path......................................................... 12
Receive Path.......................................................... 13
Other Chip Set Functions....................................... 13
T7531A Functional Blocks..................................... 14
DSP Engine Timing................................................ 16
T7531A Program Structure.................................... 16
Control of the DSP Engine via the Microprocessor
Interface .............................................................. 17
The DSP Engine Time-Slot Information Tables..... 17
The DSP Engine ac Path Coefficient Table........... 17
The Time-Slot Control Word.................................. 18
Operations Performed by the DSP Engine at
T7531A Start-Up ................................................. 18
Microprocessor Start-Up of the DSP Engine ......... 19
Powering Up a Time Slot in the T7531A................ 19
Disabling a Time Slot in the T7531A...................... 19
T7536 Powerup/Powerdown.................................. 19
Changing DSP RAM Space of an Active Time
Slot...................................................................... 20
DSP Engine Memory Requirements...................... 20
T7531A Reset and Start-Up................................... 20
Hardware Reset..................................................... 20
Internal Reset......................................................... 21
Reset of the T7536 Devices................................... 21
Start-Up After Internal Reset.................................. 21
Autocalibration........................................................22
User Test Features................................................ 22
Self-Test and Board-Test Routines.........................22
Handling Precautions ............................................... 23
Absolute Maximum Ratings...................................... 23
Electrical Characteristics.......................................... 24
dc Characteristics .................................................. 24
Transmission Characteristics ................................... 25
Timing Characteristics.............................................. 29
Software Interface .................................................... 32
Applications...............................................................42
Outline Diagram........................................................ 43
68-Pin PLCC.......................................................... 43
Ordering Information................................................. 44
Figures
Page
Figure 1. System Block Diagram ................................ 1
Figure 2. Block Diagram of T7536 Octal Converter.... 4
Figure 3. Block Diagram of One T7536 Analog
Channel .......................................................4
Figure 4. T7531A Block Diagram ................................5
Figure 5. T7531A Digital ac Path ................................6
Figure 6. Control, PCM, and Octal Interfaces .............6
Figure 7. T7536 68-Pin PLCC ....................................7
Figure 8. T7531A 68-Pin PLCC ..................................8
Figure 9. Timing Characteristics of PCM Interface
Assuming 2.048 MHz SCK Rate ...............30
Figure 10. Timing Diagram for Microprocessor
Write/Read to/from the DSP on the
Control Interface ......................................31
Figure 11. 16-Channel Line Card Solution ...............42
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