Section 17 Flash Memory
Rev. 3.00 Sep. 27, 2007 Page 588 of 758
REJ09B0243-0300
Bit Bit
Name
Initial
Value
R/W Description
0
EPVB
0
R/W
Erase Pulse Verify Block
Selects the erasing program.
0: On-chip erasing program is not selected
[Clearing condition]
When transfer is completed
1: On-chip erasing program is selected
(4) Flash Key Code Register (FKEY)
FKEY is a register for software protection that enables download of the on-chip program and
programming/erasing of flash memory. Before setting the SCO bit to 1 in order to download
the on-chip program or executing the downloaded programming/erasing program, these
processings cannot be executed if the key code is not written.
Bit:
Initial value:
R/W:
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
K[7:0]
Bit Bit
Name
Initial
Value
R/W Description
7 to 0
K[7:0]
All 0
R/W
Key Code
Only when H'A5 is written, writing to the SCO bit is
valid. When a value other than H'A5 is written to FKEY,
1 cannot be written to the SCO bit. Therefore
downloading to the on-chip RAM cannot be executed.
Only when H'5A is written, programming/erasing of
flash memory can be executed. Even if the on-chip
programming/erasing program is executed, flash
memory cannot be programmed or erased when a
value other than H'5A is written to FKEY.
H'A5: Writing to the SCO bit is enabled (The SCO bit
cannot be set by a value other than H'A5.)
H'5A: Programming/erasing is enabled (A value other
than H'5A enables software protection state.)
H'00: Initial value
Содержание SH7124 R5F7124
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Страница 68: ...Section 2 CPU Rev 3 00 Sep 27 2007 Page 48 of 758 REJ09B0243 0300 ...
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Страница 400: ...Section 9 Multi Function Timer Pulse Unit 2 MTU2 Rev 3 00 Sep 27 2007 Page 380 of 758 REJ09B0243 0300 ...
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