mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 512

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Flash Operation in Low-Power Modes
23.4.7 Read While Write (RWW)
The following simultaneous accesses are allowed:
Simultaneous data flash operations and FlexRAM writes, when FlexRAM is used for
EEPROM, are not possible.
Simultaneous operations are further discussed in
Operations.
23.4.8 Flash Program and Erase
All flash functions except read require the user to setup and launch an FTFL command
through a series of peripheral bus writes. The user cannot initiate any further FTFL
commands until notified that the current command has completed. The FTFL command
structure and operation are detailed in
23.4.9 FTFL Command Operations
FTFL command operations are typically used to modify flash memory contents. The next
sections describe:
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• The user may read from the program flash memory while commands (typically
• The MCU can fetch instructions from program flash during both data flash program
• Conversely, the user may read from data flash and FlexRAM while program and
• When configured as traditional RAM, writes to the FlexRAM are allowed during
• The command write sequence used to set FTFL command parameters and launch
• A description of all FTFL commands available
program and erase operations) are active in the data flash and FlexRAM memory
space.
and erase operations and while EEPROM backup data is maintained by the
EEPROM commands.
erase commands are executing on the program flash.
program and data flash operations.
execution
MCF51JF128 Reference Manual, Rev. 2, 03/2011
FTFL Command
Preliminary
Allowed Simultaneous Flash
Operations.
Freescale Semiconductor, Inc.