Table 45-7. Read 1s Section Command FCCOB RequirementsFCCOB Number FCCOB Contents [7:0]0 0x01 (RD1SEC)1 Flash address [23:16] of the first longword to be verified2 Flash address [15:8] of the first longword to be verified3 Flash address [7:0]1 of the first longword to be verified4 Number of longwords to be verified [15:8]5 Number of longwords to be verified [7:0]6 Read-1 Margin Choice1. Must be longword aligned (Flash address [1:0] = 00).Upon clearing CCIF to launch the Read 1s Section command, the flash memory modulesets the read margin for 1s according to Table 45-8 and then reads all locations within thespecified section of flash memory. If the flash memory module fails to read all 1s (that is,the flash section is not erased), FSTAT[MGSTAT0] is set. FSTAT[CCIF] sets after theRead 1s Section operation completes.Table 45-8. Margin Level Choices for Read 1s SectionRead Margin Choice Margin Level Description0x00 Use the 'normal' read level for 1s0x01 Apply the 'User' margin to the normal read-1 level0x02 Apply the 'Factory' margin to the normal read-1 levelTable 45-9. Read 1s Section Command Error HandlingError condition Error bitCommand not available in current mode/security FSTAT[ACCERR]An invalid margin code is supplied. FSTAT[ACCERR]An invalid flash address is supplied. FSTAT[ACCERR]Flash address is not longword aligned. FSTAT[ACCERR]The requested section crosses a Flash block boundary. FSTAT[ACCERR]The requested number of longwords is 0. FSTAT[ACCERR]Read-1s fails. FSTAT[MGSTAT0]45.4.10.3 Program Check CommandThe Program Check command tests a previously programmed program flash longword tosee if it reads correctly at the specified margin level.Chapter 45 Flash Memory Module (FTFA)KL27 Sub-Family Reference Manual , Rev. 5, 01/2016Freescale Semiconductor, Inc. 913
