10/14

ADDRESSING UP TO 4 MBYTES OF EXTERNAL MEMORY

Figure 10. Memory mapping for accessing 2M of external memory with ST90R158

Seg 0

Seg1

Seg 21

Seg 3F

Seg 22

Seg 20

1K RAM

Reserved

Reserved

Seg 23

Seg 1F

Dynamic segment

Static segment

External Memory 32K

32K External Memory

32K External Memory

32K External Memory

32K External Memory

Seg 1

Seg 2

32K External Memory

0x00 0000

0x00 8000

0x01 8000

0x02 0000

0x02 8000

0x03 0000

0x01 0000

Not Available

32K External Memory