D950-CORE datasheet(13/89 Pages) STMICROELECTRONICS

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D950-Core

BLOCK DESCRIPTION

4.1

Data Calculation Unit (DCU)

4.1.1 Introduction

The D950-Core DCU includes the following main components:

•

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

16-bit PL

16-bit A0H

16-bit A0L

16-bit A1H

16-bit A1L

40-bit A.L.U.

16-bit PH

C.C.R.

STA

8-b A0E

8-b A1E

B.S.C.

P.S.C.

16 x 16 SIGNED / UNSIGNED

MULTIPLIER

WITH PROGRAMMABLE

ROUNDING

40-bit extension

40-bit B.S.

VR02017B

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