mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 421
mc68hc912dg128
Manufacturer Part Number
mc68hc912dg128
Description
M68hc12 Microcontrollers
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC912DG128.pdf
(452 pages)
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FEELCK — Flash EEPROM Lock Control Register
FEEMCR — Flash EEPROM Module Configuration Register
21.6 Flash EEPROM Registers
MC68HC912DG128 — Rev 3.0
MOTOROLA
RESET:
RESET:
Bit 7
Bit 7
0
0
0
0
6
0
0
6
0
0
Each 32K byte Flash EEPROM module has a set of registers. The
register space $00F4-$00F7 is in a register space window of four pages.
Each register page of four bytes maps the register space for each Flash
module and each page is selected by the PPAGE register. See
Operating
LOCK — Lock Register Bit
BOOTP — Boot Protect
Freescale Semiconductor, Inc.
In normal modes the LOCK bit can only be written once after reset.
This register controls the operation of the Flash EEPROM array.
BOOTP cannot be changed when the LOCK control bit in the
FEELCK register is set or if ENPE in the FEECTL register is set.
The boot blocks are located at $E000–$FFFF and $A000–$BFFF for
odd program pages for each Flash EEPROM module. Since boot
programs must be available at all times, the only useful boot block is
at $E000–$FFFF location. All paged boot blocks can be used as
protected program space if desired.
For More Information On This Product,
0 = Enable write to FEEMCR register
1 = Disable write to FEEMCR register
0 = Enable erase and program of 8K byte boot block
1 = Disable erase and program of 8K byte boot block
Appendix: MC68HC912DG128A Flash
5
0
0
5
0
0
Modes.
Go to: www.freescale.com
4
0
0
4
0
0
3
0
0
3
0
0
2
0
0
2
0
0
Appendix: MC68HC912DG128A Flash
1
0
0
1
0
0
Flash EEPROM Registers
BOOTP
LOCK
Bit 0
Bit 0
0
1
Technical Data
$00F4
$00F5
421
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