Information

28.34.1 Flash Status Register (FTFL_FSTAT)
The FSTAT register reports the operational status of the flash memory module.
The CCIF, RDCOLERR, ACCERR, and FPVIOL bits are readable and writable. The
MGSTAT0 bit is read only. The unassigned bits read 0 and are not writable.
NOTE
When set, the Access Error (ACCERR) and Flash Protection
Violation (FPVIOL) bits in this register prevent the launch of
any more commands or writes to the FlexRAM (when
EEERDY is set) until the flag is cleared (by writing a one to it).
Address: 4002_0000h base + 0h offset = 4002_0000h
Bit 7 6 5 4 3 2 1 0
Read CCIF RDCOLERR ACCERR FPVIOL 0 MGSTAT0
Write w1c
w1c
w1c w1c
Reset
0 0 0 0 0 0 0 0
FTFL_FSTAT field descriptions
Field Description
7
CCIF
Command Complete Interrupt Flag
The CCIF flag indicates that a flash command or EEPROM file system operation has completed. The
CCIF flag is cleared by writing a 1 to CCIF to launch a command, and CCIF stays low until command
completion or command violation. The CCIF flag is also cleared by a successful write to FlexRAM while
enabled for EEE, and CCIF stays low until the EEPROM file system has created the associated EEPROM
data record.
The CCIF bit is reset to 0 but is set to 1 by the memory controller at the end of the reset initialization
sequence. Depending on how quickly the read occurs after reset release, the user may or may not see the
0 hardware reset value.
0 Flash command or EEPROM file system operation in progress
1 Flash command or EEPROM file system operation has completed
6
RDCOLERR
Flash Read Collision Error Flag
The RDCOLERR error bit indicates that the MCU attempted a read from a flash memory resource that
was being manipulated by a flash command (CCIF=0). Any simultaneous access is detected as a collision
error by the block arbitration logic. The read data in this case cannot be guaranteed. The RDCOLERR bit
is cleared by writing a 1 to it. Writing a 0 to RDCOLERR has no effect.
0 No collision error detected
1 Collision error detected
5
ACCERR
Flash Access Error Flag
The ACCERR error bit indicates an illegal access has occurred to a flash memory resource caused by a
violation of the command write sequence or issuing an illegal flash command. While ACCERR is set, the
Table continues on the next page...
Memory Map and Registers
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
592
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