Engineering Bulletin

EB381

2

MOTOROLA

Migrating to the MC68HC11F1

For current MC68HC811E2 users with external memory systems

(expanded mode operation), the MC68HC11F1 is a possible

replacement part (see Table 1). The MC68HC11F1 can address

64 Kbytes of external memory in expanded mode and requires less glue

logic than the MC68HC811E2.

Other advantages of migrating to the MC68HC11F1 are:

•

More RAM

•

More expanded mode input/output (I/O)

•

Non-multiplexed address/data bus

•

3-volt operation

•

Ability to run at higher speeds

For complete information on the MC68HC811E2, see the M68HC11E

Family Technical Data, Motorola document order number

M68HC11E/D. For information on the MC68HC11F1, see the

MC68HC11F1 Technical Data, Motorola document order number

MC68H11CF1/D. Both can be found at

http://motorola.com/semiconductor (the Motorola World Wide Web site).

Major Differences

The major differences between these two parts are:

•

Package options

•

Memory map (memory, registers, etc.)

•

EEPROM block protect

•

CONFIG register

•

External glue logic requirements

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com