MC68HC11EA9 View Datasheet(PDF) - Freescale Semiconductor

Part Name

Description

Manufacturer

MC68HC11EA9

8-Bit Microcontrollers

Freescale Semiconductor 

Freescale Semiconductor, Inc.

$0000

EXT

$1000

EXT

0000

512 BYTES RAM

EXT

01FF

1000

64-BYTE REGISTER BLOCK

EXT

103F

$B600

$D000

$FFFF

SINGLE

CHIP

B600

512 BYTES EEPROM

B7FF

EXT

EXT

BF00

BOOT

ROM

BFC0 SPECIAL MODES

INTERRUPT

BFFF

BFFF VECTORS

D000 12 KBYTES ROM/EPROM

EXPANDED BOOTSTRAP

SPECIAL

TEST

FFFF

Figure 6 MC68HC(7)11EA9 Memory Map

FFC0

FFFF

NORMAL

MODES

INTERRUPT

VECTORS

EA9 MEM MAP

INIT — RAM and I/O Mapping Register

RESET:

BIT 7

RAM3

0

6

RAM2

0

5

RAM1

0

4

RAM0

0

3

REG3

0

2

REG2

0

1

REG1

0

BIT 0

REG0

1

$103D

RAM[3:0] — RAM Map Position

These four bits, which specify the upper hexadecimal digit of the RAM address, control position of RAM

in the memory map. RAM can be positioned at the beginning of any 4 Kbyte page in the memory map.

It is initialized to address $0000 out of reset.

REG[3:0] — 64-Byte Register Block Position

These four bits specify the upper hexadecimal digit of the address for the 64-byte block of internal reg-

isters. The register block, positioned at the beginning of any 4 Kbyte page in the memory map, is initial-

ized to address $1000 out of reset.

MC68HC11EA9

MC68HC11EA9TS/D

For More Information On This Product,

13

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