Information

28.4.12.1 Read 1s Block Command
The Read 1s Block command checks to see if an entire program flash or data flash block
has been erased to the specified margin level. The FCCOB flash address bits determine
which logical block is erase-verified.
Table 28-34. Read 1s Block Command FCCOB Requirements
FCCOB Number FCCOB Contents [7:0]
0 0x00 (RD1BLK)
1 Flash address [23:16] in the flash block to be verified
2 Flash address [15:8] in the flash block to be verified
3 Flash address [7:0]
1
in the flash block to be verified
4 Read-1 Margin Choice
1. Must be longword aligned (Flash address [1:0] = 00).
After clearing CCIF to launch the Read 1s Block command, the FTFL sets the read
margin for 1s according to Table 28-35 and then reads all locations within the selected
program flash or data flash block.
When the data flash is targeted, DEPART must be set for no EEPROM, else the Read 1s
Block command aborts setting the FSTAT[ACCERR] bit. If the FTFL fails to read all 1s
(i.e. the flash block is not fully erased), the FSTAT[MGSTAT0] bit is set. The CCIF flag
sets after the Read 1s Block operation has completed.
Table 28-35. Margin Level Choices for Read 1s Block
Read Margin Choice Margin Level Description
0x00 Use the 'normal' read level for 1s
0x01 Apply the 'User' margin to the normal read-1 level
0x02 Apply the 'Factory' margin to the normal read-1 level
Table 28-36. Read 1s Block Command Error Handling
Error Condition Error Bit
Command not available in current mode/security FSTAT[ACCERR]
An invalid margin choice is specified FSTAT[ACCERR]
Program flash is selected and the address is out of program flash range FSTAT[ACCERR]
Data flash is selected and the address is out of data flash range FSTAT[ACCERR]
Data flash is selected with EEPROM enabled FSTAT[ACCERR]
Flash address is not longword aligned FSTAT[ACCERR]
Read-1s fails FSTAT[MGSTAT0]
Flash Operation in Low-Power Modes
K10 Sub-Family Reference Manual, Rev. 6, Nov 2011
646 Freescale Semiconductor, Inc.