mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 531

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

23.4.11.8 Program Section Command
The Program Section operation programs the data found in the section program buffer to
previously erased locations in the flash memory using an embedded algorithm. Data is
preloaded into the section program buffer by writing to the FlexRAM while it is set to
function as traditional RAM (see
The section program buffer is limited to the lower half of the RAM. Data written to the
upper half of the RAM is ignored and may be overwritten during Program Section
command execution.
1. Must be 32-bit aligned (Flash address [1:0] = 00).
After clearing CCIF to launch the Program Section command, the FTFL blocks access to
the FlexRAM and programs the data residing in the section program buffer into the flash
memory starting at the flash address provided.
The protection status is checked in NVM Normal mode and in NVM Special mode. The
starting address must be unprotected (see the description of the FPROT registers) to
permit execution of the Program Section operation. Programming, which is not allowed
to cross a flash sector boundary, continues until all requested longwords have been
programmed. The Program Section command also verifies that after programming, all
bits requested to be programmed are programmed.
After the Program Section operation completes, the CCIF flag is set and normal access to
the FlexRAM is restored. The contents of the section program buffer may be changed by
the Program Section operation.
Freescale Semiconductor, Inc.
FCCOB Number
0
1
2
3
4
5
A flash memory location must be in the erased state before
being programmed. Cumulative programming of bits (back-to-
back program operations without an intervening erase) within a
flash memory location is not allowed. Re-programming of
existing 0s to 0 is not allowed as this overstresses the device.
Table 23-51. Program Section Command FCCOB Requirements
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Flash Sector
CAUTION
Number of longwords to program [15:8]
Preliminary
Number of longwords to program [7:0]
FCCOB Contents [7:0]
Flash address [23:16]
Programming).
Flash address [15:8]
Flash address [7:0]
0x0B (PGMSEC)
Chapter 23 Flash Memory Module (FTFL)
1
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