FCMD Command Program flash 0 Program flash 1 Function0x01 Read 1s Section × × Verify that a givennumber of programflash locations from astarting address areerased.0x02 Program Check × × Tests previously-programmed locationsat margin read levels.0x03 Read Resource IFR, ID IFR Read 4 bytes fromprogram flash IFR orversion ID.0x06 Program Longword × × Program 4 bytes in aprogram flash block.0x08 Erase Flash Block × × Erase a program flashblock. An erase of anyflash block is onlypossible whenunprotected.0x09 Erase Flash Sector × × Erase all bytes in aprogram flash sector.0x40 Read 1s All Blocks × × Verify that all programflash blocks are erasedthen release MCUsecurity.0x41 Read Once IFR Read 4 bytes of adedicated 64 byte fieldin the program flash 0IFR.0x43 Program Once IFR One-time program of 4bytes of a dedicated64-byte field in theprogram flash 0 IFR.0x44 Erase All Blocks × × Erase all program flashblocks. Then, verify-erase and releaseMCU security.NOTE: An erase isonly possiblewhen allmemorylocations areunprotected.0x45 Verify BackdoorAccess Key× × Release MCU securityafter comparing a setof user-suppliedsecurity keys to thosestored in the programflash.Table continues on the next page...Functional DescriptionKL27 Sub-Family Reference Manual , Rev. 5, 01/2016908 Freescale Semiconductor, Inc.
