MC68HC08JB8A Datasheet, PDF (1/8 Pages) Motorola, Inc – This addendum provides additional information to the MC68HC908JB8 Technical Data, Rev. 2

Addendum
HC908JB8AD/D
Rev. 0, 4/2002
Addendum to
MC68HC908JB8
Technical Data
Freescale Semiconductor, Inc.
This addendum provides additional information to the
MC68HC908JB8 Technical Data, Rev. 2
(Motorola document number MC68HC908JB8/D),
MC68HC08JB8A
The MC68HC08JB8A is the ROM part equivalent to the MC68HC908JB8. The
entire MC68HC908JB8 data book apply to this ROM device, with exceptions
outlined in this addendum.
Table 1. Summary of MC68HC08JB8A and MC68HC908JB8 Differences
Memory ($DC00–$FBFF)
User vectors ($FFF0–$FFFF)
MC68HC08JB8A
8,192 bytes ROM
16 bytes ROM
Registers at $FE08 and $FF09
Not used;
locations are reserved.
Monitor ROM
($FC00–$FDFF and $FE10–$FFDF)
OSC1 and OSC2 pins
$FC00–$FDFF: Not used.
$FE10–$FFDF: Used for
testing purposes only.
V_DD level (5V logic)
MC68HC908JB8
8,192 bytes FLASH
16 bytes FLASH
FLASH related registers.
$FE08 — FLCR
$FF09 — FLBPR
Used for testing and FLASH
programming/erasing.
V_REG level (3.3V logic)
MCU Block Diagram Figure 1 shows the block diagram of the MC68HC08JB8A.
Memory Map
The MC68HC08JB8A has 8,192 bytes of user ROM from $DC00 to $FBFF, and
16 bytes of user ROM vectors from $FFF0 to $FFFF. On the MC68HC908JB8,
these memory locations are FLASH memory.
Figure 2 shows the memory map of the MC68HC08JB8A.
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