ST90135 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

Manufacturer

ST90135

8/16-BIT MCU FAMILY WITH UP TO 64K ROM/OTP/EPROM AND UP TO 2K RAM

STMicroelectronics 

ST90158 - REGISTER AND MEMORY MAP

3.3 MEMORY MAP

Figure 18. Memory Map

Internal

20FFFFh

RA M

512 bytes

20FE00h

768 bytes

2 0FD00h

1 Kbytes

20FC00h

1.5 Kbytes

20FA00h

2 Kbytes

20F800h

3 FFFFFh

External

Memory

Reserved

Upper Memory

(usually RAM mapped

in Segment 23h)

2 30000h

22FFFFh

SEGMENTS 21h and 22h

128 Kbytes

210000h

2 0FFFFh

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

007FFFh

24 Kbytes

00FFFFh

Internal

003FFFh

ROM

16 Kbytes

000000 h

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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