mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 497

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

23.34.4 Flash Status Register (FTFL_FSTAT)
The FSTAT register reports the operational status of the FTFL module.
Freescale Semiconductor, Inc.
ERSSUSP
RAMRDY
Reserved
EEERDY
PFLSH
Field
4
3
2
1
0
This bit issues a request to the memory controller to execute the Erase All Blocks command and release
security. ERSAREQ is not directly writable but is under indirect user control. Refer to the device's Chip
Configuration details on how to request this command.
The ERSAREQ bit sets when an erase all request is triggered external to the FTFL and CCIF is set (no
command is currently being executed). ERSAREQ is cleared by the FTFL when the operation completes.
0
1
Erase Suspend
The ERSSUSP bit allows the user to suspend (interrupt) the Erase Flash Sector command while it is
executing.
0
1
This read-only bit is reserved and always has the value zero.
FTFL configuration
0
1
RAM Ready
This flag indicates the current status of the FlexRAM.
The state of the RAMRDY flag is normally controlled by the Set FlexRAM Function command. During the
reset sequence, the RAMRDY flag is cleared if the FlexNVM block is partitioned for EEPROM and is set if
the FlexNVM block is not partitioned for EEPROM. The RAMRDY flag is cleared if the Program Partition
command is run to partition the FlexNVM block for EEPROM. The RAMRDY flag sets after completion of
the Erase All Blocks command or execution of the erase-all operation triggered external to the FTFL.
0
1
This flag indicates if the EEPROM backup data has been copied to the FlexRAM and is therefore
available for read access.
0
1
No request or request complete
Request to: 1.run the Erase All Blocks command,2.verify the erased state,3.program the security byte
in the Flash Configuration Field to the unsecure state, and4.release MCU security by setting the
FSEC[SEC] field to the unsecure state.
No suspend requested
Suspend the current Erase Flash Sector command execution.
FTFL configured for FlexMemory that supports data flash and/or EEPROM
Reserved
FlexRAM is not available for traditional RAM access.
FlexRAM is available as traditional RAM only; writes to the FlexRAM do not trigger EEPROM
operations.
FlexRAM is not available for EEPROM operation.
FlexRAM is available for EEPROM operations where: •reads from the FlexRAM return data previously
written to the FlexRAM in EEPROM mode and•writes launch an EEPROM operation to store the
written data in the FlexRAM and EEPROM backup.
FTFL_FCNFG field descriptions (continued)
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
Description
Chapter 23 Flash Memory Module (FTFL)
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