Datasheet

EEPROM 4K
Register Descriptions
MC9S12DP256 — Revision 1.1
EEPROM 4K
EPDIS — EEPROM Protection disable
This bit determines whether there is a protected area at the higher end
of the EEPROM block address map.
1 = Protection disabled
0 = Protection enabled
EP[2:0] — EEPROM Protection address size
These 3 bits determine the size of the protected area.
The EEPROM holds a field of 16-bytes consisting of 1 protection byte
and 15 reserved bytes. The layout of this field is:
Table 37 Address Range Protection
EP[2:0]
Protected Address
Range
Protected Size
000 $_FC0 - $_FFF 64 bytes
001 $_F80 - $_FFF 128 bytes
010 $_F40 - $_FFF 192 bytes
011 $_F00 - $_FFF 256 bytes
100 $_EC0 - $_FFF 320 bytes
101 $_E80 - $_FFF 384 bytes
110 $_E40 - $_FFF 448 bytes
111 $_E00 - $_FFF 512 bytes
Table 38 Flash 0 Protection/Security Field
Address Size Description
$_FF0 - $_FFC 13 Reserved
$_FFD 1 Protection byte for EEPROM
$_FFE - $_FFF 2 Reserved
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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