XC912BC32CFU8 Motorola Semiconductor Products, XC912BC32CFU8 Datasheet - Page 98

• Manufacturer Part Number: XC912BC32CFU8
• Description: M68HC12B Family Data Sheet
• Manufacturer: Motorola Semiconductor Products

EEPROM
Data Sheet
98
Read access to the memory array section can be enabled or disabled by the EEON
control bit in the EEPROM initialization register (INITEE). This feature allows the
access of memory mapped resources that have lower priority than the EEPROM
memory array. EEPROM control registers can be accessed and EEPROM
locations may be programmed or erased regardless of the state of EEON.
Using the normal EEPROG control, it is possible to continue program/erase
operations during wait. For lowest power consumption during wait, stop
program/erase by turning off EEPGM.
If the stop mode is entered during programming or erasing, program/erase voltage
will be turned off automatically and the resistor-capacitor (RC) clock (if enabled) is
stopped. However, the EEPGM control bit will remain set. When stop mode is
terminated, the program/erase voltage will be turned back on automatically if
EEPGM is set.
At bus frequencies below 1 MHz, the RC clock must be turned on for
program/erase.
Figure 7-1. EEPROM Block Protect Mapping
EEPROM
$_D00
$_E00
$_F00
$_F80
$_FC0
256 BYTES
256 BYTES
128 BYTES
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
M68HC12B Family — Rev. 8.0
MOTOROLA