Information

Table 28-42. Erase Flash Block Command Error Handling (continued)

Error Condition Error Bit

Program flash is selected and the address is out of program flash range FSTAT[ACCERR]

Flash address is not longword aligned FSTAT[ACCERR]

Any area of the selected flash block is protected FSTAT[FPVIOL]

Any errors have been encountered during the verify operation FSTAT[MGSTAT0]

28.4.10.7 Erase Flash Sector Command

The Erase Flash Sector operation erases all addresses in a Flash sector.

Table 28-43. Erase Flash Sector Command FCCOB Requirements

FCCOB Number FCCOB Contents [7:0]

0 0x09 (ERSSCR)

1 Flash address [23:16] in the flash sector to be erased

2 Flash address [15:8] in the flash sector to be erased

3 Flash address [7:0]

in the flash sector to be erased

1. Must be phrase aligned (flash address [2:0] = 000).

After clearing CCIF to launch the Erase Flash Sector command, the FTFL erases the

selected program flash sector and then verifies that it is erased. The Erase Flash Sector

command aborts if the selected sector is protected (see the description of the FPROT

registers). The swap indicator address in each program flash block is implicitly protected

from sector erase unless the swap system is in the UPDATE or UPDATE-ERASED state

and the program flash sector containing the swap indicator address being erased is the

non-active block. If the erase-verify fails the FSTAT[MGSTAT0] bit is set. The CCIF

flag is set after the Erase Flash Sector operation completes. The Erase Flash Sector

command is suspendable (see the FCNFG[ERSSUSP] bit and Figure 28-25).

Table 28-44. 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]

Any errors have been encountered during the verify operation FSTAT[MGSTAT0]

Chapter 28 Flash Memory Module (FTFL)

K20 Sub-Family Reference Manual, Rev. 6, Nov 2011

Freescale Semiconductor, Inc. 633