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Part Name
Description
ST90158P9C6 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST90158P9C6
8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM
STMicroelectronics
ST90158P9C6 Datasheet PDF : 199 Pages
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ST90158 - REGISTER AND MEMORY MAP
3.3 MEMORY MAP
Figure 18. Memory Map
Internal
20FFFFh
RAM
768 bytes
20FD00h
1 Kbytes
20FC00h
1.5 Kbytes
20FA00h
2 Kbytes
20F800h
3FFFFFh
External
Memory
Reserved
Upper Memory
(usually RAM mapped
in Segment 23h)
230000h
22FFFFh
SEGMENTS 21h and 22h
128 Kbytes
210000h
20FFFFh
20C000h
20BFFFh
208000h
207FFFh
204000h
203FFFh
200000h
1FFFFFh
PAGE 83 - 16 Kbytes
PAGE 82 - 16 Kbytes
SEGMENT 20h
PAGE 81 - 16 Kbytes 64 Kbytes
PAGE 80 - 16 Kbytes
64 Kbytes
00FFFFh
48 Kbytes
00BFFFh
32 Kbytes
Internal
007FFFh
00FFFFh
ROM
24 Kbytes
000000h
External
Memory
Internal ROM/EPROM
(external ROM on
ROMless devices)
010000h
00FFFFh
00C000h
00BFFFh
008000h
007FFFh
004000h
003FFFh
000000h
Lower Memory
(usually ROM/EPROM mapped
in Segment 1)
PAGE 3 - 16 Kbytes
PAGE 2 - 16 Kbytes
PAGE 1 - 16 Kbytes
PAGE 0 - 16 Kbytes
SEGMENT 0
64 Kbytes
Note:
The total amount of directly addressable external memory is 64 Kbytes.
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