Table 29-21. Erase Flash Sector Command Error Handling
Error Condition Error Bit
Command not available in current mode/security FSTAT[ACCERR]
An invalid Flash address is supplied FSTAT[ACCERR]
Flash address is not phrase aligned FSTAT[ACCERR]
The selected program flash sector is protected FSTAT[FPVIOL]
The selected program flash sector is located in an XA controlled segment and the Erase All
Blocks or the Read 1s All Blocks command has not successfully completed since the last
reset
FSTAT[FPVIOL]
Any errors have been encountered during the verify operation
1
FSTAT[MGSTAT0]
1. User margin read may be run using the Read 1s Section command to verify all bits are erased.
29.4.11.7.1 Suspending an Erase Flash Sector Operation
To suspend an Erase Flash Sector operation set the FCNFG[ERSSUSP] bit when CCIF,
ACCERR, and FPVIOL are clear and the CCOB command field holds the code for the
Erase Flash Sector command. During the Erase Flash Sector operation (see Erase Flash
Sector Command), the flash memory module samples the state of the ERSSUSP bit at
convenient points. If the flash memory module detects that the ERSSUSP bit is set, the
Erase Flash Sector operation is suspended and the flash memory module sets CCIF.
While ERSSUSP is set, all writes to flash registers are ignored except for writes to the
FSTAT and FCNFG registers.
If an Erase Flash Sector operation effectively completes before the flash memory module
detects that a suspend request has been made, the flash memory module clears the
ERSSUSP bit prior to setting CCIF. When an Erase Flash Sector operation has been
successfully suspended, the flash memory module sets CCIF and leaves the ERSSUSP bit
set. While CCIF is set, the ERSSUSP bit can only be cleared to prevent the withdrawal of
a suspend request before the flash memory module has acknowledged it.
29.4.11.7.2
Resuming a Suspended Erase Flash Sector Operation
If the ERSSUSP bit is still set when CCIF is cleared to launch the next command, the
previous Erase Flash Sector operation resumes. The flash memory module acknowledges
the request to resume a suspended operation by clearing the ERSSUSP bit. A new
suspend request can then be made by setting ERSSUSP. A single Erase Flash Sector
operation can be suspended and resumed multiple times.
There is a minimum elapsed time limit of 4.3 msec between the request to resume the
Erase Flash Sector operation (CCIF is cleared) and the request to suspend the operation
again (ERSSUSP is set). This minimum time period is required to ensure that the Erase
Flash Sector operation will eventually complete. If the minimum period is continually
Chapter 29 Flash Memory Module (FTFA)
K22F Sub-Family Reference Manual, Rev. 4, 08/2016
NXP Semiconductors 667
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