Register and memory map
ST92124xxx-Auto/150xxxxx-Auto/250xxxx-Auto
Figure 39. ST92150-Auto/250-Auto external memory map
3FFFFFh
External
Memory
SEGMENT 24h
64 Kbytes
250000h
24FFFFh
24C000h
24BFFFh
248000h
247FFFh
244000h
243FFFh
240000h
Segments 20h to 23h
(Reserved for
internal
memory)
(256Kbytes)
PAGE 93h - 16 Kbytes
PAGE 92h - 16 Kbytes
PAGE 91h - 16 Kbytes
PAGE 90h - 16 Kbytes
Upper Memory (1.8 Mbytes)
(usually external RAM starting
in Segment 24h)
1FFFFFh
External
Memory
SEGMENT 4h
64 Kbytes
Segments 0h to 3h
(Reserved for
internal
memory)
(256Kbytes)
050000h
04FFFFh
04C000h
04BFFFh
048000h
047FFFh
044000h
043FFFh
040000h
PAGE 13h - 16 Kbytes
PAGE 12h - 16 Kbytes
PAGE 11h - 16 Kbytes
PAGE 10h - 16 Kbytes
Lower Memory (1.8 Mbytes)
(usually external ROM/FLASH
starting in Segment 4h)
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Doc ID 13898 Rev 2