mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 500

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

Memory Map and Registers
1. Refers to FCCOB register name, not register address
23.34.6 Program Flash Protection Registers (FTFL_FPROTn)
The FPROT registers define which logical program flash regions are protected from
program and erase operations. Protected flash regions cannot have their content changed;
that is, these regions cannot be programmed and cannot be erased by any FTFL
command. Unprotected regions can be changed by program and erase operations.
The four FPROT registers allow 32 protectable regions. Each bit protects a 1/32 region of
the program flash memory.
During the reset sequence, the FPROT registers are loaded with the contents of the
program flash protection bytes in the Flash Configuration Field as indicated in the
following table.
500
Field
The following table shows a generic FTFL command format. The first FCCOB register, FCCOB0, always
contains the command code. This 8-bit value defines the command to be executed. The command code
is followed by the parameters required for this specific FTFL command, typically an address and/or data
values.
The command parameter table is written in terms of FCCOB Number (which is equivalent to the byte
number). This number is a reference to the FCCOB register name and is not the register address.
1. Refers to FCCOB register name, not register address
FCCOB Endianness:
The FCCOB register group uses a big endian addressing convention. For all command parameter fields
larger than one byte, the most significant data resides in the lowest FCCOB register number.
0
1
2
3
4
5
6
7
8
9
A
B
FCCOB Number
FTFL_FCCOBn field descriptions (continued)
MCF51JF128 Reference Manual, Rev. 2, 03/2011
1
FCMD (a code that defines the FTFL command)
Flash address [23:16]
Flash address [15:8]
Flash address [7:0]
Data Byte 0
Data Byte 1
Data Byte 2
Data Byte 3
Data Byte 4
Data Byte 5
Data Byte 6
Data Byte 7
Preliminary
Typical Command Parameter Contents [7:0]
Description
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