MC68HC05P18 Datasheet, PDF (34/144 Pages) Freescale Semiconductor, Inc – Advance Information

Memory
Freescale Semiconductor, Inc.
2.4 RAM
The user RAM consists of 192 bytes (including the stack) at locations
$0050–$010F. The stack begins at address $00FF. The stack pointer
can access 64 bytes of RAM from $00FF to $00C0.
NOTE:
Using the stack area for data storage or temporary work locations
requires care to prevent it from being overwritten due to stacking from an
interrupt or subroutine call.
2.5 ROM (MC68HC05P18 Only)
There are 8064 bytes of user ROM available, consisting of 8000 bytes
at locations $1FC0–$3EFF, 48 bytes in page zero locations
$0020–$004F, and 16 additional bytes of user vectors at locations
$3FF0–$3FFF.
NOTE:
Address space $3F00–$3FEF is reserved for test code. Unlike other
M68HC05 devices, the MC68HC05P18 does not contain self-check
code.
2.6 EEPROM
The EEPROM is located at address $0140 and consists of 128 bytes.
Programming the EEPROM can be done by the user on a single byte
basis by manipulating the programming register, located at address
$001C. Refer to Section 8. EEPROM for a discussion of the EEPROM.
2.7 User EEPROM (MC68HC805P18 Only)
There are 8064 bytes of user EEPROM available, consisting of 8000
bytes at locations $1FC0–$3EFF, 48 bytes in page zero locations
$0020–$004F, and 16 additional bytes for user vectors at locations
$3FF0–$3FFF.
This EEPROM can be programmed only in bootloader mode. Refer to
6.3.2 Bootloader Mode for more details.
Advance Information
34
MC68HC(8)05P18 — Rev. 2.0
Memory
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