- 您现在的位置：买卖IC网 > Sheet目录1245 > SOUNDBITE (Freescale Semiconductor)BOARD DEMO AUDIO DEVELOPMENT
DSP56371 Overview
In addition, the DSP56371 provides a set of on-chip peripherals, described in Section 2.5 Peripheral
2.4.1
Data ALU
The Data ALU performs all the arithmetic and logical operations on data operands in the DSP56300 core.
The components of the Data ALU are as follows:
? Fully pipelined 24-bit × 24-bit parallel multiplier-accumulator (MAC)
? Bit field unit, comprising a 56-bit parallel barrel shifter (fast shift and normalization; bit stream
generation and parsing)
? Conditional ALU instructions
? 24-bit or 16-bit arithmetic support under software control
? Four 24-bit input general purpose registers: X1, X0, Y1, and Y0
? Six Data ALU registers (A2, A1, A0, B2, B1 and B0) that are concatenated into two general
purpose, 56-bit accumulators (A and B), accumulator shifters
? Two data bus shifter/limiter circuits
2.4.1.1
Data ALU Registers
The Data ALU registers can be read or written over the X memory data bus (XDB) and the Y memory data
bus (YDB) as 24- or 48-bit operands (or as 16- or 32-bit operands in 16-bit arithmetic mode). The source
operands for the Data ALU, which can be 24, 48, or 56 bits (16, 32, or 40 bits in 16-bit arithmetic mode),
always originate from Data ALU registers. The results of all Data ALU operations are stored in an
accumulator.
All the Data ALU operations are performed in two clock cycles in pipeline fashion so that a new
instruction can be initiated in every clock, yielding an effective execution rate of one instruction per clock
cycle. The destination of every arithmetic operation can be used as a source operand for the immediately
following arithmetic operation without a time penalty (for example, without a pipeline stall).
2.4.1.2
Multiplier-Accumulator (MAC)
The MAC unit comprises the main arithmetic processing unit of the DSP56300 core and performs all of
the calculations on data operands. In the case of arithmetic instructions, the unit accepts as many as three
input operands and outputs one 56-bit result of the following form- Extension:Most Significant
Product:Least Significant Product (EXT:MSP:LSP).
The multiplier executes 24-bit × 24-bit, parallel, fractional multiplies, between two’s-complement signed,
unsigned, or mixed operands. The 48-bit product is right-justified and added to the 56-bit contents of either
the A or B accumulator. A 56-bit result can be stored as a 24-bit operand. The LSP can either be truncated
or rounded into the MSP. Rounding is performed if specified.
DSP56371 Data Sheet, Rev. 4.1
Freescale Semiconductor
5
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
SP339EER1-0A-EB
BOARD EVALUATION FOR SP339E
SP720ABG
TVS ARRAY ESD 14 INPUT 16-SOIC
SP720ABT
TVS ARRAY ESD 14 INPUT 16-SOIC
SP721ABG
TVS ARRAY ESD 6 INPUT 8-SOIC
SP721ABT
TVS ARRAY ESD 6 INPUT 8-SOIC
SP723ABT
TVS ARRAY ESD 6 INPUT 8-SOIC
SP723APP
TVS ARRAY ESD 6 INPUT 8-DIP
SP724AHTG
TVS ARRAY ESD 4 INPUT SOT-23
相关代理商/技术参数
SOURCE INSPECTION
制造商:Vishay Dale 功能描述:FACTORY INSPECTION
SOURCE INSPECTION CHARGE
制造商:Leach International Corporation 功能描述:SUB MINIATURE - Virtual or Non-Physical Inventory (Software & Literature)
SOURCEINSPECTION/SG1549Y-12824
制造商:Microsemi Corporation 功能描述:CURRENT SENSE LATCH - Bulk
SOVEREIGN 10-300
制造商:Fane International 功能描述:Sovereign Series 10" Professional Audio Woofer - 300W RMS
SOVEREIGN 12-200
制造商:Fane International 功能描述:Sovereign Series 12 Inch Prosound Woofer 200W
SOVEREIGN 15-250
制造商:Fane International 功能描述:Sovereign Series 15 Inch Prosound Woofer
SOVEREIGN 15-500
制造商:Fane International 功能描述:Sovereign Series 15 Inch Prosound Woofer 500W
SOVEREIGN 18-500
制造商:Fane International 功能描述:Sovereign Series 18 Inch Prosound Woofer