Fujitsu F2MCTM-16LX Manual

A SERVICE OF

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CHAPTER 23 ROM MIRRORING MODULE

23.1 Overview of ROM Mirroring Function Select Module

The ROM mirroring function select module provides a setting so that ROM data in the

FF bank can be read by access to the 00 bank.

■ Block Diagram of ROM Mirroring Function Select Module

Figure 23.1-1 Block Diagram of ROM Mirroring Function Select Module

■ Access to FF Bank by ROM Mirroring Function

Figure 23.1-2 shows the location in memory when ROM mirroring function allows access to the 00 bank to

read ROM data in the FF bank.

Figure 23.1-2 Access to FF Bank by ROM Mirroring Function

ROM

MI

ROM mirror function select register (ROMM)

Re-

served

Re-

served

Re-

served

Re-

served

Re-

served

Re-

served

Re-

served

Address area

00 bankFF bank

Address

Data

Internal data bus

FFFFFFH

FF0000H

FF8000H

FEFFFFH

00FFFFH

008000H

MB90F362/T(S),MB90362/T(S)

MB90F367/T(S),MB90367/T(S)

00 bank

ROM mirror area

FF bank

Area for ROM mirror