mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 79
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mc68hc08qa24
Manufacturer Part Number
mc68hc08qa24
Description
M68hc08 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC08QA24.pdf
(400 pages)
- Current page: 79 of 400
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6.4.6 EEPROM Control Register
MC68HC08QA24
Freescale SemiconductorElectrically Erasable Programmable Read-Only Memory (EEPROM)
NOTE:
Address: $FE1D
array. The contents are non-volatile and are not modified by reset. On
reset, this special register loads the EEPROM configuration into a
corresponding volatile EEACR. Thereafter, all reads to the EENVR will
reload EEACR.
The EEPROM configuration can be changed by programming/erasing
the EENVR like a normal EEPROM byte. The new array configuration
will take effect with a system reset or a read of the EENVR.
EECR is a read/write register that controls programming/erasing of the
array.
EEBCLK — EEPROM Bus Clock Enable Bit
Use the internal RC oscillator for applications in the 3- to 5-V range.
EEOFF — EEPROM Power Down Bit
Reset:
Read:
Write:
This read/write bit determines which clock will be used to drive the
internal charge pump for programming/erasing. Reset clears this 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 = Bus clock drives charge pump.
0 = Internal RC oscillator drives charge pump.
1 = Disable EEPROM array
0 = Enable EEPROM array
EEBCLK
Bit 7
R
0
Figure 6-1. EEPROM Control Register (EECR)
Electrically Erasable Programmable Read-Only Memory (EEPROM)
= Reserved
R
6
0
0
EEOFF
5
0
EERAS1
4
0
EERAS0
3
0
EELAT
2
0
R
1
0
0
Technical Data
EEPGM
Bit 0
0
77
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