ST40RA datasheet(11/94 Pages) STMICROELECTRONICS

11 / 94 page

5 System configuration

ST40RA

11/94

STMicroelectronics

ADCS 7260755H

ST’s own tools include:

C/C++ compilers,

debugger,

proprietary OS.

Third parties include:

Microsoft: WindowsCE,

Sun: JavaOS for consumers,

WindRiver: VxWorks, Tornado tools,

Linux,

Insignia JVM,

ANT browser.

4.5.2

Software compatibility

SH-4 core software

The ST40RA SH-4 core is binary code compatible with the Hitachi SH775x family.

Standard peripheral driver

The ST40 standard SCIF, timer, real-time clock and PIO are compatible with the ST40 SOC range

of devices and the Hitachi SH775x family.

Bus interface driver

The PCI, LMI, and EMI interfaces are register compatible with the ST40 SOC range of devices.

The ST40RA contains an EMPI and MPX arbiter and MPX clock control unit which are additional to

the bus interface components of the ST40 SOC range of devices.

I/O device driver

The Mailbox is a module with no ST legacy software.

System configuration

The ST40RA system address map has been designed to maintain compatibility with existing ST40

family devices and other STMicroelectronics devices.

The SH-4 core and core peripherals maintain compatibility with the ST40 SOC range of devices and

Hitachi SH7750 wherever possible.

Devices listed in

Table 2: ST40RA system address map on page 13, are documented in the ST40

System Architecture Manual as described in Chapter 2: ST40 documentation suite on page 6.

Coherency between the cache and external memory is assured by software. The ST40 CPU has

cache control instructions which enable software to do this. Details of these instructions are given in

the

ST40 CPU Core Architecture Manual.

The ST40RA is run in little endian mode.

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