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參數(shù)資料
| 型號(hào)： | T8301 |
| 英文描述： | T8301 Internet Protocol Telephone Phone-On-A-Chip⑩ IP Solution DSP |
| 中文描述： | T8301因特網(wǎng)協(xié)議電話熱線電話在一個(gè)芯片⑩DSP的IP解決方案 |
| 文件頁(yè)數(shù)： | 9/190頁(yè) |
| 文件大?。?/td> | 1535K |
| 代理商： | T8301 |
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Lucent Technologies Inc.
9
Advance Data Sheet
December 2000
T8301 Internet Protocol Telephone
Phone-On-A-Chip
IP Solution DSP
4 DSP1600 Core
The discussions in this section pertain to circuitry that is inside of the dotted outline in Figure 3. For additional
resources, please refer to the
DSP1627 Digital Signal Processor
Data Sheet.
The DSP1600 core includes a data arithmetic unit, memory addressing units, cache, and a control section. In com-
bination, these elements support a diverse instruction set for implementing users’ algorithms.
4.1 Bit Manipulation Unit (BMU)
The BMU provides extensive bit manipulation capabilities that increase the DSP1627’s efficiency in processing
data.
4.2 Timer
The DSP1627 core contains a programmable interrupt timer that can be configured to count over a wide range of
frequencies. This timer provides flexibility in timing events.
4.3 Clock PLL Control
The DSP1627 powers up with the input clock (
CKI1/CKI2
in the T8301 IC) as the source for the processor clock.
An on-chip clock synthesizer (PLL) can also be used to generate the system clock for the DSP1627, which will run
at a frequency multiple of the input clock. The clock synthesizer is deselected and powered down on reset. For low-
power operation, an internally generated slow clock can be used to drive the DSP1627. If both the clock synthe-
sizer and the internally generated slow clock are selected, the slow clock will drive the DSP1627; however, the syn-
thesizer will continue to run.
The clock synthesizer and other programmable clock sources are discussed in the DSP1627 data sheet. The use
of these programmable clock sources for power management is also discussed in the DSP1627 data sheet. Board
designers should refer to the section on V
DDA
and V
SSA
connections in the data sheet for specific connection and
filtering requirements on the clock synthesizer power and ground leads.
Note: The 12,288 KHz is required as shown. Variations from this crystal frequency will cause detrimental effects to speech quality.
Figure 4. Crystal Oscillator
OSCILLATOR
TO PLL
÷
768
16 kHz
TO CODECS
CKI1
CKI2
LOAD
CAPACITOR
LOAD
CAPACITOR
12,288 kHz
CRYSTAL
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| T8531A | T8531A/8532 Multichannel Programmable Codec Chip Set |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| T8301AX | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die |
| T8301BX | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die |
| T8301DX | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die |
| T8302 | 制造商:AGERE 制造商全稱:AGERE 功能描述:T8302 Internet Protocol Telephone Advanced RISC Machine (ARM) Ethernet QoS Using IEEE 802.1q |
| T8302A | 制造商:MOLEX 制造商全稱:Molex Electronics Ltd. 功能描述:Terminator Die |
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