mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 540

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

Flash Operation in Low-Power Modes
23.4.11.15 Set FlexRAM Function Command
The Set FlexRAM Function command changes the function of the FlexRAM:
After clearing CCIF to launch the Set FlexRAM Function command, the FTFL sets the
function of the FlexRAM based on the FlexRAM Function Control Code.
When making the FlexRAM available as traditional RAM, the FTFL clears the
FCNFG[EEERDY] flag, overwrites the contents of the entire FlexRAM with a
background pattern of all ones, and sets the FCNFG[RAMRDY] flag. The state of the
EPROT register does not prevent the FlexRAM from being overwritten. When the
FlexRAM is set to function as a RAM, normal read and write accesses to the FlexRAM
540
FCCOB5[7:3] != 00000
Any errors have been encountered during the verify operation
Error Condition
FlexRAM Function
• When not partitioned for EEPROM, the FlexRAM is typically used as traditional
• When partitioned for EEPROM, the FlexRAM is typically used to store EEPROM
FCCOB Number
Control Code
RAM.
data.
0xFF
0x00
0
1
Table 23-67. Program Partition Command Error Handling (continued)
Table 23-68. Set FlexRAM Function Command FCCOB Requirements
Make FlexRAM available as RAM:
Make FlexRAM available for EEPROM:
Action
• Clear the FCNFG[RAMRDY] and FCNFG[EEERDY] flags
• Write a background of ones to all FlexRAM locations
• Set the FCNFG[RAMRDY] flag
• Clear the FCNFG[RAMRDY] and FCNFG[EEERDY] flags
• Write a background of ones to all FlexRAM locations
• Copy-down existing EEPROM data to FlexRAM
• Set the FCNFG[EEERDY] flag
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Table 23-69. FlexRAM Function Control
Preliminary
FlexRAM Function Control Code
FCCOB Contents [7:0]
(see
0x81 (SETRAM)
Table
23-69)
Freescale Semiconductor, Inc.
FSTAT[MGSTAT0]
FSTAT[ACCERR]
Error Bit