MC9S12HZ256 Datasheet, PDF (97/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 3 2 Kbyte EEPROM Module (EETS2KV1)
Table 3-1. EEPROM Protection/Reserved Field
Address Offset
0x07F0 – 0x07FC
0x07FD
0x07FE – 0x07FF
Size
(Bytes)
13
1
2
Description
Reserved
EEPROM protection byte
Reserved
The EEPROM module has hardware interlocks which protect data from accidental corruption. A protected
sector is located at the higher address end of the EEPROM array, just below address 0x07FF. The protected
sector in the EEPROM array can be sized from 64 bytes to 512 bytes. In addition, the EPOPEN bit in the
EPROT register, described in Section 3.3.2.5, “EEPROM Protection Register (EPROT)”, can be set to
globally protect the entire EEPROM array.
Chip security is defined at the MCU level.
MODULE BASE + 0x0000
MODULE BASE + 0x000B
(12 BYTES)
EEPROM Registers
EEPROM BASE + 0x0000
1536 BYTES
EEPROM ARRAY
0x0600
0x0640
0x0680
0x06C0
0x0700
0x0740
0x0780
0x07C0
EEPROM BASE + 0x07FF
EEPROM Protected High Sectors
64, 128, 192, 256, 320, 384, 448, 512 bytes
0x07F0 – 0x07FF, EEPROM Protection/Reserved Field
Figure 3-2. EEPROM Memory Map
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
97