MC68HC908RK2 Datasheet, PDF (21/158 Pages) Motorola, Inc – Microcontroller Unit

Chapter 2
Memory
2.1 Introduction
The memory map, shown in Figure 2-1, includes:
• 2031 bytes of user FLASH memory
• 128 bytes of random-access memory (RAM)
• 14 bytes of user-defined vectors in FLASH memory
• 768 bytes of monitor read-only memory (ROM)
These definitions apply to the memory map representation of reserved and unimplemented locations:
• Reserved — Accessing a reserved location can have unpredictable effects on MCU operation.
• Unimplemented — Accessing an unimplemented location causes an illegal address reset.
2.2 Input/Output Section
Addresses $0000–$003F, shown in Figure 2-2, contain most of the control, status, and data registers.
Additional I/O registers have these addresses:
• $FE00 — SIM break status register, SBSR
• $FE01 — SIM reset status register, SRSR
• $FE02 — SIM break flag control register, BFCR
• $FE08 — FLASH control register, FLCR
• $FE0C — BREAK address register high, BRKH
• $FE0D — BREAK address register low, BRKL
• $FE0E — BREAK status and control register, BSCR
• $FE0F — LVI status register, LVISR
• $FFF0 — FLASH block protection register, FLBPR
• $FFFF — COP control register, COPCTL
MC68HC908RK2 Data Sheet, Rev. 5.1
Freescale Semiconductor
21