MC68HC11A0CFN2(1996) Ver la hoja de datos (PDF) - Motorola => Freescale

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MC68HC11A0CFN2
(Rev.:1996)

HCMOS Single-Chip Microcontroller

Motorola => Freescale 

3 ON-CHIP MEMORY

This section describes the on-chip ROM, RAM, and EEPROM memories. The memory

maps for each mode of operation are shown and the RAM and l/O mapping register

(INIT) is described. The INIT register allows the on-chip RAM and the 64 control reg-

isters to be moved to suit the needs of a particular application.

3.1 Memory Maps

Composite memory maps for each mode of operation are shown in Figure 3-1. Mem-

ory locations are shown in the shaded areas and the contents of these shaded areas

are shown to the right. These modes include single-chip, expanded multiplexed, spe-

cial bootstrap, and special test.

Single-chip operating modes do not generate external addresses. Refer to Table 3-1

for a full list of the registers.

3

$0000

EXT

EXT

$1000

EXT

EXT

$B600

EXT

EXT

$E000

$FFFF

SINGLE

CHIP

EXPANDED BOOTSTRAP SPECIAL

TEST

0000 256 BYTES RAM

00FF

1000 64-BYTE REGISTER BLOCK

103F

B600 512 BYTES EEPROM

B7FF

BF40

BOOT

ROM

BFFF

BFC0

BFFF

SPECIAL MODES

INTERRUPT

VECTORS

E000 8 KBYTES ROM

FFFF

FFC0

FFFF

NORMAL

MODES

INTERRUPT

VECTORS

A8 MEM MAP

Figure 3-1 Memory Maps

MC68HC11A8

TECHNICAL DATA

ON-CHIP MEMORY

MOTOROLA

3-1

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