MC68HC908BD48 Datasheet, PDF (56/290 Pages) Freescale Semiconductor, Inc – Microcontrollers

FLASH Memory
4.3 Functional Description
The FLASH memory is an array of 48,128 bytes with an additional 26
bytes of user vectors. An erased bit reads as logic 1 and a programmed
bit reads as a logic 0. Program and erase operations are facilitated
through control bits in a memory mapped FLASH control register
(FLCR). The address ranges for the user memory and vectors are:
• $4000–$FBFF; user memory
• $FE07; FLASH control register
• $FE08; FLASH block protect register
• $FFE6–$FFFF; these locations are reserved for user-defined
interrupt and reset vectors
Programming tools are available from Motorola. Contact your local
Motorola representative for more information.
4.4 FLASH Control Register (FLCR)
The FLASH control register (FLCR) controls FLASH program and erase
operations.
Address: $FE07
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
0
0
HVEN MASS ERASE PGM
Write:
Reset: 0
0
0
0
0
0
0
0
= Unimplemented
Figure 4-1. FLASH Control Register (FLCR)
Technical Data
56
FLASH Memory
MC68HC908BD48 — Rev. 1.0
MOTOROLA