MC68HC08AS32 Datasheet, PDF (70/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Electrically Erasable Programmable ROM
6.4.6 EEPROM Control Register
This read/write register controls programming/erasing of the array.
Address: $FE1D
Bit 7
6
5
4
3
2
1
Read:
0
0
EEBCLK
EEOFF EERAS1 EERAS0 EELAT
Write:
R
R
Reset: 0
0
0
0
0
0
0
R = Reserved
Figure 6-1. EEPROM Control Register (EECR)
Bit 0
EEPGM
0
EEBCLK — EEPROM Bus Clock Enable Bit
This read/write bit determines which clock will be used to drive the
internal charge pump for programming/erasing. Reset clears this bit.
1 = Bus clock drives charge pump.
0 = Internal RC oscillator drives charge pump.
NOTE: Use the internal RC oscillator for applications in the 3- to 5-V range.
EEOFF — EEPROM Power Down Bit
This read/write bit disables the EEPROM module for lower power
consumption. Any attempts to access the array will give unpredictable
results. Reset clears this bit.
1 = Disable EEPROM array
0 = Enable EEPROM array
NOTE:
The EEPROM requires a recovery time, t_EEOFF, to stabilize after clearing
the EEOFF bit. Refer to 21.5 5.0-Volt DC Electrical Characteristics
Control Timing for timing values.
Advance Information
70
MC68HC08AS32 — Rev. 3.0
Electrically Erasable Programmable ROM (EEPROM)
MOTOROLA