mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 541

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

are available. When large sections of flash memory need to be programmed, e.g. during
factory programming, the FlexRAM can be used as the Section Program Buffer for the
Program Section command (see
When making the FlexRAM available for EEPROM, the FTFL clears the
FCNFG[RAMRDY] flag, overwrites the contents of the FlexRAM allocated for
EEPROM with a background pattern of all ones, and copies the existing EEPROM data
from the EEPROM backup record space to the FlexRAM. After completion of the
EEPROM copy-down, the FCNFG[EEERDY] flag is set. When the FlexRAM is set to
function as EEPROM, normal read and write access to the FlexRAM is available, but
writes to the FlexRAM also invoke EEPROM activity.
23.4.12 Security
The FTFL module provides security information to the MCU based on contents of the
FSEC security register. The MCU then limits access to FTFL resources as defined in the
device's Chip Configuration details. During reset, the FTFL module initializes the FSEC
register using data read from the security byte of the Flash Configuration Field (see
Configuration Field
The following fields are available in the FSEC register. Details of the settings are
described in the FSEC register description.
Freescale Semiconductor, Inc.
Command not available in current mode/security
FlexRAM Function Control Code is not defined
FlexRAM Function Control Code is set to make the FlexRAM available for EEPROM, but
FlexNVM is not partitioned for EEPROM
Error Condition
Table 23-70. Set FlexRAM Function Command Error Handling
FSEC field
FSLACC
KEYEN
MEEN
Description).
SEC
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Program Section
Table 23-71. FSEC fields
Preliminary
Command).
Freescale Factory Access
Chapter 23 Flash Memory Module (FTFL)
Mass Erase Capability
Backdoor Key Access
MCU security
Description
FSTAT[ACCERR]
FSTAT[ACCERR]
FSTAT[ACCERR]
Error Bit
Flash
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