Datasheet

Chapter 19 Module Mapping Control (MMCV4)
MC9S12E128 Data Sheet, Rev. 1.07
Freescale Semiconductor 549
19.3.2.3 Initialization of Internal EEPROM Position Register (INITEE)
Read: Anytime
Write: The EEON bit can be written to any time on all devices. Bits E[11:15] are “write anytime in all
modes” on most devices. On some devices, bits E[11:15] are “write once in normal and emulation modes
and write anytime in special modes”. See device overview chapter to determine the actual write access
rights.
NOTE
Writes to this register take one cycle to go into effect.
This register initializes the position of the internal EEPROM within the on-chip system memory map.
76543210
R
EE15 EE14 EE13 EE12 EE11
00
EEON
W
Reset
1
————————
1. The reset state of this register is controlled at chip integration. Please refer to the device overview section to determine the
actual reset state of this register.
= Unimplemented or Reserved
Figure 19-5. Initialization of Internal EEPROM Position Register (INITEE)
Table 19-4. INITEE Field Descriptions
Field Description
7:3
EE[15:11]
Internal EEPROM Map Position — These bits determine the upper five bits of the base address for the system’s
internal EEPROM array.
0
EEON
Enable EEPROM — This bit is used to enable the EEPROM memory in the memory map.
0 Disables the EEPROM from the memory map.
1 Enables the EEPROM in the memory map at the address selected by EE[15:11].