MC68HC908LJ12_1 Datasheet, PDF (9/16 Pages) Freescale Semiconductor, Inc – Addendum to MC68HC908LJ12 Technical Data

Freescale Semiconductor, Inc.
HC908LJ12AD/D
MC68HC08LJ12
MC68HC08LJ12
The MC68HC08LJ12 is the ROM part equivalent to the MC68HC908LJ12.
Table 8. Summary of MC68HC08LJ12 and MC68HC908LJ12 Differences
Operating voltages
Memory ($C000–$EFFF)
User vectors ($FFD0–$FFFF)
Registers at $FE08 and $FF09
Monitor ROM
($FC00–$FDFF and $FE10–$FFCF)
Available packages
MC68HC08LJ12
MC68HC908LJ12
—
5.0V ± 10%
3.3V ± 10%
5.0V ± 10%
12,288 bytes ROM
12,288 bytes FLASH
48 bytes ROM
48 bytes FLASH
Not used;
locations are reserved.
FLASH related registers.
$FE08 — FLCR
$FF09 — FLBPR
Used for testing purposes only.
Used for testing and FLASH
programming/erasing.
52-pin LQFP
64-pin LQFP
64-pin QFP
52-pin LQFP
64-pin LQFP
64-pin QFP
MCU Block Diagram Figure 4 shows the block diagram of the MC68HC08LJ12.
Memory Map
The MC68HC08LJ128 has 12,288 bytes of user ROM from $C000 to $EFFF,
and 48 bytes of user ROM vectors from $FFD0 to $FFFF. On the
MC68HC908LJ12 these memory locations are FLASH memory.
Figure 5 shows the memory map of the MC68HC08LJ12.
Reserved Registers
The two registers at $FE08 and $FE09 are reserved locations on the
MC68HC08LJ12.
On the MC68HC908LJ12, these two locations are the FLASH control register
and the FLASH block protect register respectively.
Monitor ROM
The monitor program (monitor ROM: $FE10–$FFCF and $FC00–$FDFF) on
the MC68HC08LJ12 is for device testing only.
Addendum to MC68HC908LJ12 Technical Data
For More Information On This Product,
Go to: www.freescale.com