January 2008

v 2 . 1

1

© 2008 Actel Corporation

CoreAPB

Product Summary

Intended Use

•

Intended for Use in a Processor Subsystem to

Implement the Advanced Peripheral Bus (APB)

Fabric

•

Configured for Easy and Automatic System Design

with CoreConsole

Key Features

•

Supplied in SysBASIC Core Bundle

•

Up to 16 APB Slave Devices Supported

•

Automatic Connection to AHB Bridge (CoreAHB2APB)

and APB Slaves

Benefits

•

Allows Easy Connection of APB Devices to a

CoreMP7 or Cortex-M1 Subsystem

•

Auto Stitch in CoreConsole for Rapid Development

•

Compatible with Advanced Microcontroller Bus

Architecture (AMBA), CoreMP7, and Cortex-M1

Supported Device Families

•Fusion

•

IGLOO™

•

IGLOOe

•ProASIC3

•ProASIC3E

Synthesis and Simulation Support

•

Environment (IDE)

Verification and Compliance

•

Compliant with AMBA

General Description

Along with CoreAHB2APB, the CoreAPB component

provides an AMBA APB fabric that supports up to 16 APB

slaves. CoreAHB2APB provides APB address decoding in

the form of select signals. CoreAPB is concerned with

multiplexing the read data busses from all the APB slaves

into one single read data bus to send to CoreAHB2APB.

Figure 1 gives an illustration of CoreAPB.

There is one APB master interface, which is typically

connected to the AMBA Bridge, and 16 equal-sized

(16 MB) APB slave interfaces.

Contents

General Description ................................................... 1

Connecting CoreAPB in CoreConsole ....................... 2

Resource Requirements ............................................. 2

Ordering Information ................................................ 2

List of Changes ........................................................... 3

Datasheet Categories ................................................. 3

Figure 1 • CoreAPB

PSTB

PA[31:0]

PWDATA[31:0]

PRDATA[31:0]

PWRITE

PSELslave1

PSELslave2

PSELslaveN

PRDATA[31:0]

PRDATA[31:0]

PRDATA[31:0]

From Slave 1

From Slave 2

From Slave N

To APB Slaves

From Bridge

To Bridge