Information

Table 28-45. Program Longword Command FCCOB Requirements

FCCOB Number FCCOB Contents [7:0]

0 0x06 (PGM4)

1 Flash address [23:16]

2 Flash address [15:8]

3 Flash address [7:0]

4 Byte 0 program value

5 Byte 1 program value

6 Byte 2 program value

7 Byte 3 program value

1. Must be longword aligned (Flash address [1:0] = 00).

Upon clearing CCIF to launch the Program Longword command, the flash memory

module programs the data bytes into the flash using the supplied address. The targeted

flash locations must be currently unprotected (see the description of the FPROT and

FDPROT registers) to permit execution of the Program Longword operation.

The programming operation is unidirectional. It can only move NVM bits from the erased

state ('1') to the programmed state ('0'). Erased bits that fail to program to the '0' state are

flagged as errors in MGSTAT0. The CCIF flag is set after the Program Longword

operation completes.

The supplied address must be longword aligned (flash address [1:0] = 00):

• Byte 0 data is written to the supplied address ('start'),

• Byte 1 data is programmed to byte address start+0b01,

• Byte 2 data is programmed to byte address start+0b10, and

• Byte 3 data is programmed to byte address start+0b11.

Table 28-46. Program Longword 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 longword aligned FSTAT[ACCERR]

Flash address points to a protected area FSTAT[FPVIOL]

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

Flash Operation in Low-Power Modes

K20 Sub-Family Reference Manual, Rev. 2, Feb 2012

540 Freescale Semiconductor, Inc.