mc68hc912bc32 Freescale Semiconductor, Inc, mc68hc912bc32 Datasheet - Page 94

• Manufacturer Part Number: mc68hc912bc32
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

EEPROM
At bus frequencies below 1 MHz, the RC clock must be turned on for program/erase.
7.3 EEPROM Control Registers
This section describes the EEPROM control registers.
7.3.1 EEPROM Module Configuration Register
EESWAI — EEPROM Stops in Wait Mode Bit
PROTLCK — Block Protect Write Lock Bit
EERC — EEPROM Charge Pump Clock Bit
94
This bit should be cleared if the wait mode vectors are mapped in the EEPROM array.
Read anytime. Write once in normal modes (SMODN = 1); set and clear anytime in special modes
(SMODN = 0).
The RC oscillator is required when the system bus clock is lower than f
Read and write anytime.
0 = Module is not affected during wait mode.
1 = Module ceases to be clocked during wait mode.
0 = Block protect bits and bulk erase protection bit can be written.
1 = Block protect bits are locked.
0 = System clock is used as clock source for the internal charge pump. Internal RC oscillator is
1 = Internal RC oscillator drives the charge pump.
stopped.
Address: $00F0
Reset:
Read:
Write:
Figure 7-2. EEPROM Module Configuration Register (EEMCR)
Bit 7
1
1
Figure 7-1. EEPROM Block Protect Mapping
6
1
1
M68HC12B Family Data Sheet, Rev. 9.1
$_D00
$_E00
$_F00
$_F80
$_FC0
5
1
1
4
1
1
256 BYTES
256 BYTES
128 BYTES
BPROT4
BPROT3
BPROT2
BPROT1
BPROT0
3
1
1
EESWAI
2
1
PROG
PROTLCK
1
0
.
Freescale Semiconductor
EERC
Bit 0
0