mc68hc908lj24 Freescale Semiconductor, Inc, mc68hc908lj24 Datasheet - Page 70

• Manufacturer Part Number: mc68hc908lj24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

FLASH Memory (FLASH)
4.3 Functional Description
Data Sheet
70
# Non-volatile FLASH register; write by programming.
$FFCF
Addr.
$FE08
FLASH Control Register
FLASH Block Protect
Register Name
NOTE:
(FLBPR)
Register
(FLCR)
#
The FLASH memory consists of an array of 24,576 bytes for user
memory plus a block of 48 bytes for user interrupt vectors. An erased bit
reads as logic 1 and a programmed bit reads as a logic 0. The FLASH
memory page size is defined as 128 bytes, and is the minimum size that
can be erased in a page erase operation. Program and erase operations
are facilitated through control bits in FLASH control register (FLCR). The
address ranges for the FLASH memory are:
Programming tools are available from Freescale. Contact your local
Freescale representative for more information.
A security feature prevents viewing of the FLASH contents.
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or
copying the FLASH difficult for unauthorized users.
Reset:
Reset:
Read:
Read:
Write:
Write:
Figure 4-1. FLASH I/O Register Summary
•
•
$9000–$EFFF; user memory, 24,576 bytes
$FFD0–$FFFF; user interrupt vectors, 48 bytes
BPR7
Bit 7
0
0
FLASH Memory (FLASH)
= Unimplemented
BPR6
6
0
0
BPR5
5
0
0
Unaffected by reset; $FF when blank
BPR4
4
0
0
HVEN
BPR3
MC68HC908LJ24/LK24 — Rev. 2.1
3
0
MASS
BPR2
Freescale Semiconductor
0
2
ERASE
BPR1
1
0
1
BPR0
Bit 0
PGM
0