8XC196NT

8XC196NT Memory Map

Address

Description

(Note 7)

FFFFFFH

External Memory

FFA000H

FF9FFFH

Internal OTPROM or External Memory (Determined by EA Pin)

FF2080H

RESET at FF2080H

FF207FH

Reserved Memory (Internal OTPROM or External Memory)

FF2000H

(Determined by EA Pin)

FF1FFFH

External Memory

FF0600H

FF05FFH

Internal RAM (Identically Mapped into 00400H – 005FFH)

FF0400H

FF03FFH

External Memory

FF0100H

FF00FFH

Reserved for ICE

FF0000H

FEFFFFH

External Memory for future devices

100000H

FFFFFH

984 Kbytes External Memory

00A000H

009FFFH

Internal OTPROM or External Memory (Note 1)

002080H

00207FH

Reserved Memory (Internal OTPROM or External Memory)

002000H

(Notes 1 3 and 6)

001FFFH

Memory Mapped Special Function Registers (SFR’s)

001FE0H

001FDFH

Internal Special Function Registers (SFR’s) (Note 5)

001F00H

001EFFH

External Memory

000600H

0005FFH

Internal RAM

000400H

(Address with Indirect or Indexed Modes)

0003FFH

Upper Register File (Address with Indirect or

Register RAM

Indexed Modes or through Windows) (Note 2)

000100H

*

0000FFH

Register RAM

Lower Register File

000018H

(Address with Direct

000017H

CPU SFR’s

Indirect or Indexed

000000H

*

Modes) (Notes 2 4)

NOTES

memory

2 Code executed in locations 00000H to 003FFH will be forced external

3 Reserved memory locations must contain 0FFH unless noted

4 Reserved SFR bit locations must be written with 0

5 Refer to 8XC196NT User’s Guide and Quick Reference for SFR descriptions

6 WARNING The contents or functions of reserved memory locations may change with future revisions of the device

Therefore a program that relies on one or more of these locations may not function properly

7 The 8XC196NT internally uses 24 bit address but only 20 address lines are bonded out allowing 1 Mbyte external

address space

3