D950CORE View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

D950CORE

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

STMicroelectronics 

D950-Core

7.2.2 I/O interface

In this section, the terms input and output are related to BSU, and the terms internal and

external are related to the AS-DSP.

The BSU I/O interface signals are of two types:

On the D950-Core side:

IA0/IA15 (I address bus) and ID0/ID15 (I data bus) with their associated control

signals:

IRD (read / input)

IWR (write / input)

IBS (bus strobe / input)

XA0/XA15 (X address bus) and XD0/XD15 (X data bus) with their associated control

signals:

XRD (read / input)

XWR (write /input)

XBS (bus strobe / input)

YA0/YA15 (Y address bus) and YD0/YD15 (Y data bus) with their associated control

signals:

YRD (read / input)

YWR (write / input)

YBS (bus strobe / input)

DTACK (data transfer acknowledge / output)

BSU_CLK (clock / input)

On the internal memory side:

IID (internal I-memory space deselect / output)

IXD (internal X-memory space deselect / output)

IYD (internal Y-memory space deselect / output)

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