MC68HC05X4 Datasheet, PDF (57/156 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Memory
General Description
Contents
Memory map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
RAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Non-volatile memory (NVM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
MCU registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
MCAN registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Memory map
The MC68HC05X4 has an 8K byte memory map consisting of MCAN
control registers, user ROM or EPROM, user RAM, bootloader ROM,
and I/O (as illustrated in Figure 1).
RAM
The user RAM consists of 176 bytes of memory space shared with a 64
byte stack area. The stack begins at address $00FF. The stack pointer
can access 64 bytes of RAM in the range $00C0 to $00FF.
NOTE:
Using the stack area for data storage or temporary work locations
requires care, to prevent the data from being overwritten due to stacking
from an interrupt or subroutine call.
1-mem
MOTOROLA
Memory
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MC68HC05X4 Rev 1.0
57