MC908JL8CDWE Datasheet, PDF (25/212 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 2
Memory
2.1 Introduction
The CPU08 can address 64-kbytes of memory space. The memory map, shown in Figure 2-1, includes:
• 8,192 bytes of user FLASH memory
• 36 bytes of user-defined vectors
• 959 bytes of monitor ROM
2.2 I/O Section
Addresses $0000–$003F, shown in Figure 2-2, contain most of the control, status, and data registers.
Additional I/O registers have the following addresses:
• $FE00; Break Status Register, BSR
• $FE01; Reset Status Register, RSR
• $FE02; Reserved
• $FE03; Break Flag Control Register, BFCR
• $FE04; Interrupt Status Register 1, INT1
• $FE05; Interrupt Status Register 2, INT2
• $FE06; Interrupt Status Register 3, INT3
• $FE07; Reserved
• $FE08; FLASH Control Register, FLCR
• $FE09; Reserved
• $FE0A; Reserved
• $FE0B; Reserved
• $FE0C; Break Address Register High, BRKH
• $FE0D; Break Address Register Low, BRKL
• $FE0E; Break Status and Control Register, BRKSCR
• $FE0F; Reserved
• $FFCF; FLASH Block Protect Register, FLBPR (FLASH register)
• $FFD0; Mask Option Register, MOR (FLASH register)
• $FFFF; COP Control Register, COPCTL
2.3 Monitor ROM
The 959 bytes at addresses $FC00–$FDFF and $FE10–$FFCE are reserved ROM addresses that
contain the instructions for the monitor functions. (See Chapter 7 Monitor ROM (MON).)
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
Freescale Semiconductor
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