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MC68HC08AS32A Datasheet(PDF) 46 Page - Motorola, Inc

No. de Pieza. MC68HC08AS32A
Descripción  Microcontrollers
Descarga  296 Pages
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Fabricante  MOTOROLA [Motorola, Inc]
Página de inicio  http://www.freescale.com
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MC68HC08AS32A Datasheet(HTML) 46 Page - Motorola, Inc

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Memory
Data Sheet
MC68HC08AS32A — Rev. 1
46
Memory
MOTOROLA
different. For forward compatibility, software should not make any dependency on
this delay time.
E. Any attempt to clear both EEPGM and EELAT bits with a single instruction will
only clear EEPGM. This is to allow time for the completion of the on-board
programming sequence and removal of high voltage from the EEPROM array.
F. It is proper to disable interrupts prior to performing an erase cycle. If the cycle is
interrupted, any/all data in the array could be erased.
2.5.2 EEPROM Register Descriptions
Four I/O registers and three non-volatile registers control program, erase, and
options of the EEPROM array.
2.5.2.1 EEPROM Control Register
This read/write register controls programming/erasing of the array.
Bit 7 — Unused Bit
This read/write bit is software programmable but has no functionality.
EEOFF — EEPROM Power Down
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
EERAS1 and EERAS0 — Erase/Program Mode Select Bits
These read/write bits set the programming/erasing modes. Reset clears these
bits.
NOTE:
Modifying these bits during a program/erase cycle may result in the loss of any/all
data in the array.
Address: $FE1D
Bit 7
654321
Bit 0
Read:
UNUSED
0
EEOFF
EERAS1
EERAS0
EELAT
AUTO
EEPGM
Write:
Reset:
00000000
= Unimplemented
Figure 2-3. EEPROM Control Register (EECR)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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