參數(shù)資料
型號(hào)： T8531
元件分類： Codec
英文描述： T8502 and T8503 Dual PCM Codecs with Filters
中文描述： T8502和T8503雙的PCM編解碼器與濾波器
文件頁(yè)數(shù)： 5/48頁(yè)
文件大小： 999K
代理商： T8531
Lucent Technologies Inc.
5
Preliminary Data Sheet
November 2000
Codec Chip Set
T8531/T8532 Multichannel Programmable
General Description
(continued)
T8531 Description
As shown in Figure 4, the
T8531 contains a digital signal processor (DSP) engine surrounded by a customized
input/output frame. The I/O frame performs the
μ
-law or A-law conversion as well as the decimation and interpola-
tion functions needed to interface the sigma-delta bit streams to the digital signal processor engine. The sigma-
delta converters operate at a 1.024 MHz sample rate, while the signal processor operates at 16 ksamples/s. A key
function of the I/O frame is to control the timing of the digital data going to the signal processor so that group delay
is minimized.
The I/O frame also contains an integrated phase-locked loop which synthesizes all the required internal clocks for
the chip set.
The microcontroller interface is used to run the ROM routines and to download the gain, filter, and balance network
settings, powerup/powerdown commands, time-slot assignments, digital loopback settings, and commands for the
T8532 octal chips.
0505(F)
Figure 4. T8531 Block Diagram
PLL
CLOCK
SYNTHESIZER
JTAG
SYSTEM PCM INTERFACE
DATA TRANSFER
μ
/A-LAW CONVERTER
MICRO-
PROCESSOR
CONTROL
INTERFACE
DSP
ROM
DSP
RAM
DIGITAL
SIGNAL
PROCESSING
ENGINE
DECIMATOR
INTERPOLATOR
TSA
T8532 CONTROL INTERFACE
T8532 OVERSAMPLED INTERFACE
UPCK
UPDI
UPDO
TSTCLK
V
DD
V
SS
HDS
UPCS
HIGHZB
RSTB
T_SYNC
TEST
OSDX/R[3:0]
O
O
C
C
C
C
T
T
T
T
S
S
S
S
S
V
D
V
S
C
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T8532 T8502 and T8503 Dual PCM Codecs with Filters
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
T8531A 制造商:AGERE 制造商全稱:AGERE 功能描述:T8531A/8532 Multichannel Programmable Codec Chip Set
T8532 制造商:AGERE 制造商全稱:AGERE 功能描述:T8531A/8532 Multichannel Programmable Codec Chip Set
T8533 制造商:AGERE 制造商全稱:AGERE 功能描述:T8533/34 Quad Programmable Line Card Signal Processor
T85331G 制造商:BITECH 制造商全稱:Bi technologies 功能描述:Thick Film Super Low Profile SIP Resistor Networks
T85331J 制造商:BITECH 制造商全稱:Bi technologies 功能描述:Thick Film Super Low Profile SIP Resistor Networks
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