
MC68HC812A4
—
Rev. 3.0
Advance Information
114
EEPROM
MOTOROLA
EEPROM
7.4 EEPROM Control Registers
This section describes the EEPROM control registers.
7.4.1 EEPROM Module Configuration Register
Read: Anytime
Write: Varies from bit to bit
EESWAI — EEPROM Stops in Wait Mode Bit
0 = Module is not affected during wait mode.
1 = Module ceases to be clocked during wait mode.
This bit should be cleared if the wait mode vectors are mapped in the
EEPROM array.
PROTLCK — Block Protect Write Lock Bit
0 = Block protect bits and bulk erase protection bit can be written.
1 = Block protect bits are locked.
Write once in normal modes (SMODN = 1). Set and clear anytime in
special modes (SMODN = 0).
EERC — EEPROM Charge Pump Clock Bit
0 = System clock is used as clock source for the internal charge
pump; internal RC oscillator is stopped.
1 = Internal RC oscillator drives the charge pump; RC oscillator is
required when the system bus clock is lower than f
PROG
.
Write anytime
Address: $00F0
Bit 7
6
5
4
3
2
1
Bit 0
Read:
1
1
1
1
1
EESWAI
PROTLCK
EERC
Write:
Reset:
1
1
1
1
1
1
0
0
Figure 7-2. EEPROM Module Configuration Register (EEMCR)