D950-CORE データシートの表示（PDF） - STMicroelectronics

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D950-CORE

16-Bit Fixed Point Digital Signal Processor (DSP) Core

STMicroelectronics 

4 BLOCK DESCRIPTION

D950-Core

4.1 Data Calculation Unit (DCU)

4.1.1 Introduction

The D950-Core DCU includes the following main components:

• Register file - containing 16 data registers

• 4 Control Registers:

• DCU0CR: Register

• BSC: Shifter Control

• PSC: Shifter Control

• CCR: ALU Flags

• Multiplier - 16x16-bit signed/unsigned fractional/integer parallel multiplier.

• BSU - 40-bit Barrel Shifter Unit with a maximum right or left shift value of 32.

• ALU - 40-bit Arithmetic and Logic Unit implementing a wide range of arithmetic

and logic functions with an 8-bit extension for arithmetic operations.

• BMU - 16-bit Bit Manipulation Unit implementing bit operations on internal

registers and/or on 16-bit data RAM with an 8/16-bit mask.

Figure 4.1 D950-Core Data Calculation Unit

XD

16

L1

L0

16

XD

YD

8

8

STA

YD

16

R1

R0

16

16 x 16 SIGNED / UNSIGNED

16

MULTIPLIER

WITH PROGRAMMABLE

ROUNDING

32

16-bit PH

16-bit PL

6

B.S.C.

6

P.S.C.

40-bit extension

40-bit B.S.

32

40

40-bit extension

40-bit A.L.U.

13

8

32

8-b A0E

C.C.R. 8-b A1E

16-bit A0H

16-bit A1H

16-bit A0L

16-bit A1L

XD

16

13 13 8 8

16

YD

VR02017B

13/89

5

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