Overview Of Rom Mirroring Function Selection Module - Fujitsu MB90895 Series Hardware Manual

CHAPTER 18 ROM Mirroring Function Selection Module
18.1

Overview of ROM Mirroring Function Selection 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.
I Block Diagram of ROM Mirroring Function Select Module
Figure 18.1-1 Block Diagram of ROM Mirroring Function Select Module
Address
I Access to FF Bank by ROM Mirroring Function
Figure 18.1-2 shows the location in memory when ROM mirroring function allows access to the 00 bank to
read ROM data in the FF bank.
572
FF Bank
Data
Figure 18.1-2 Access to FF Bank by ROM Mirroring Function
004000
00 bank
H
00FFFF
H
FC0000
H
FEFFFF
H
FF0000
H
FF4000
H
FF bank
(ROM mirroring
applicable Area)
FFFFFF
H
ROM Mirroring Function Select register
Reserved Reserved Reserved
Reserved
Address Area
ROM
ROM mirroring area
MB90F897/S
(ROMM)
MI
Reserved Reserved Reserved
00 Bank
MB90V495G