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Bit Bit
Name
Initial
Value
R/W Description
7 to 3
Unused
Return 0.
2 SS
R/W
Source Select Error Detect
Only one type of the on-chip program which can be
downloaded can be specified. When more than two
types of programs are selected, the program is not
selected, or the program is selected without being
mapped, an error occurs.
0: Download program can be selected normally
1: Download error occurred (multiple selection or
program which is not mapped is selected)
1 FK
R/W
Flash Key Register Error Detect
Returns the check result whether the value of FKEY is
set to H'A5.
0: FKEY setting is normal (FKEY = H'A5)
1: Setting value of FKEY becomes error (FKEY = value
other than H
′
A5)
0 SF
R/W
Success/Fail
Returns the result whether download is ended normally
or not. The determination result whether program that is
downloaded to the on-chip RAM is read back and then
transferred to the on-chip RAM is returned.
0: Downloading on-chip program is ended normally (no
error)
1: Downloading on-chip program is ended abnormally
(error occurs)
(2) Programming/Erasing Initialization
The on-chip programming/erasing program to be downloaded includes the initialization program.
The specified period pulse must be applied when programming or erasing. The specified pulse
width is made by the method in which wait loop is configured by the CPU instruction. The
operating frequency of the CPU must be set.
The initialization program is set as a parameter of the programming/erasing program which has
downloaded these settings.
(a) Flash Program/Erase Frequency Parameter (FPEFEQ: General Register ER0 of CPU)
FPEFEQ sets the operating frequency of the CPU. The settable range of the operating frequency in
this LSI is 5 to 20 MHz.
Содержание H8S/2437
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