ST18D952 Просмотр технического описания (PDF) - STMicroelectronics

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ST18D952

DIGITAL SIGNAL PROCESSOR (DSP) CHIP

STMicroelectronics 

ST18952

4 D950Core

The D950Core is composed of three main units.

• Data Calculation Unit (DCU)

• Address Calculation Unit (ACU)

• Program Control Unit (PCU)

For full details of the D950 DSP core refer to the D950Core datasheet (document number 42-

1709).

These units are organized in an HARVARD architecture around three bidirectional 16-bit

buses, two for data and one for instruction. Each of these buses is dedicated to an uni-

directional 16-bit address bus (XA/YA/IA).

An 8-bit general purpose parallel port (P0-P7) can be configured (input or output). A test

condition is attached to each bit to test external events.

The D950Core is controlled through interface pins related to interrupt, low-power mode, reset

and miscellaneous functions.

Figure 4.1 D950Core block diagram

DA TA

CALCULATION

UNI T

Control

6

16

ADDRESS

CALCULATION XA-bus

16

16

UNIT

YA -bus

16

PROGRAM

3

CONTROL

UNIT

ID-bus

16

IA -bus

16

12/66

11

8

CONTROL PO/P7

14

TEST & EMULATION

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