Fujitsu MB96300 series Hardware Manual page 303

MB96300 Super Series Hardware Manual
12.1.3 External bus areas
Up to 6 external bus areas with dedicated Chip select signals can be configured
independently.
The 16MB address area can be divided into 6 external address areas with corresponding
Chip select signals.
■ External bus areas
The 16MB address area of the F
configuration registers and Chip select signals. The address range of the external bus areas 0 and 1 is fixed,
while the address range of the other areas can be programmed within the upper 15MB address space by using
the External Area Select (EAS) Registers and the External Area Size Select bits in the External Area
Configuration (EACH) registers.
Memory access outside activated address areas does not show any activity on the I/O cells associated to the
external bus interface.
Table 12.1-1 Address range of external bus areas
External area
External area 0
External area 1
External area 2
External area 3
External area 4
External area 5
*) RAM-Start is the start address of the internal RAM (device dependent).
The following figure shows the external bus areas with their default address ranges.
2
MC-16FX MCU can be divided into 6 External bus areas with dedicated
available address area
h'00.00f0...h'00.00ff
h'00.0c00...(RAM-Start - 1)
h'10.0000...h'ff.ffff
CHAPTER 12 EXTERNAL BUS INTERFACE
corresponding default address area
chip select
CS0 h'00.00f0...h'00.00ff (fixed)
CS1 h'00.c000...(RAM-Start - 1) (fixed)
CS2 h'10.0000...h'3f.ffff (3MByte)
CS3 h'40.0000...h'7f.ffff (4MByte)
CS4 h'80.0000...h'bf.ffff (4MByte)
CS5 h'c0.0000...h'ff.ffff
(=4MByte incl. external Reset Vector)
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