M68HC12A4EVB Freescale Semiconductor, M68HC12A4EVB Datasheet - Page 111

• Manufacturer Part Number: M68HC12A4EVB
• Manufacturer: Freescale Semiconductor

Specifications of M68HC12A4EVB

• Lead Free Status / Rohs Status: Not Compliant

Chapter 9
Read-Only Memory (ROM)
9.1 Introduction
The MC68HC12BE32 and MC68HC12BC32 contain 32 Kbytes of read-only memory (ROM). The ROM
array is arranged in a 16-bit configuration and may be read as either bytes, aligned words or misaligned
words. Access time is one bus cycle for byte and aligned word access and two bus cycles for misaligned
word operations.
9.2 ROM Array
After reset, the ROM array is located from addresses $8000 to $FFFF in single-chip mode. In expanded
modes, the ROM array is located from address $0000 to $7FFF; however, it is disabled from the memory
map. The ROM can be mapped to an alternate address range. See
Chapter 5 Operating Modes and
Resource
Mapping.
M68HC12B Family Data Sheet, Rev. 9.1
Freescale Semiconductor
111