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参数资料
| 型号： | B900M24FXX12IT |
| 元件分类： | 数字信号处理 |
| 英文描述： | 0-BIT, 59.88 MHz, OTHER DSP, PQCC44 |
| 文件页数： | 33/100页 |
| 文件大小： | 1547K |
| 代理商： | B900M24FXX12IT |
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38
Lucent Technologies Inc.
B900
Advance Data Sheet
Baseband Signal Processor
July 1999
4 Hardware Architecture (continued)
4.11 Bit Manipulation Unit (BMU)
The BMU interfaces directly to the main accumulators in the DAU providing the following features:
s
Barrel shifting—logical and arithmetic, left and right shift
s
Normalization and extraction of exponent
s
Bit-field extraction and insertion
These features increase the efficiency of the B900 in applications such as control or data encoding and decoding.
For example, data packing and unpacking, in which short data words are packed into one 16-bit word for more effi-
cient memory storage, is very easy.
In addition, the BMU provides two auxiliary accumulators, aa0 and aa1. In one instruction cycle, 36-bit data can be
shuffled, or swapped, between one of the main accumulators and one of the alternate accumulators. The ar<0—3>
registers are 16-bit registers that control the operations of the BMU. They store a value that determines the amount
of shift or the width and offset fields for bit extraction or insertion. Certain operations in the BMU set flags in the
DAU psw register and the alf register. See Table 48 on page 57 and Table 36 on page 49. The ar<0—3> registers
can also be used as general-purpose registers.
相关PDF资料 |
PDF描述 |
|---|---|
| B900J24PXX12I | 0-BIT, 80 MHz, OTHER DSP, PQFP44 |
| B900J24FXX12IT | 0-BIT, 59.88 MHz, OTHER DSP, PQFP44 |
| BA00CC0WCP-V5 | 1A Low Dropout Voltage Regulator with Shut Down Switch(Adustable Voltage) |
| BA10E6 | COPPER ALLOY, TIN FINISH, RING TERMINAL |
| BA12004 | 0.5 A, 7 CHANNEL, NPN, Si, POWER TRANSISTOR |
相关代理商/技术参数 |
参数描述 |
|---|---|
| B901 | 制造商:EDAL 制造商全称:EDAL 功能描述:Silicon Bridge Rectifier |
| B901 10.0MM | 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 10.0MM |
| B901 4.0MM | 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 4.0MM |
| B901 5.0MM | 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 5.0MM |
| B901 8.0MM | 制造商:DORMER TOOLS 功能描述:M/C REAMER B901 8.0MM |
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