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rate and system clock frequency within one of the ranges shown in table 19.8 can be used
for boot mode execution.
On-Chip RAM Area Divisions in Boot Mode: In boot mode, the RAM area is divided into an
area used by the boot program and an area to which the user program is transferred via the SCI, as
shown in figure 19.8. The boot program area becomes available when a transition is made to the
execution state for the user program transferred to RAM.
Note: The boot program area cannot be used until a transition is made to the execution state
for the user program transferred to RAM. Note also that the boot program remains in
this area in RAM even after control branches to the user program.
In boot mode in the H8/3062F-ZTAT A-mask version, the contents of the 8-byte ID code area
shown below are checked to determine whether the program is a programming control program
compatible with the H8/3062F-ZTAT A-mask version.
H'FFF520
H'FFF528 ...
If an original programming control program is used in boot mode, the 8-byte ID code shown
above should be added at the beginning of the program.
H'FFEF20
H'FFF51F
H'FFF520
H'FFFF1F
Figure 19.8 RAM Areas in Boot Mode
40
FE
61
(Product ID code)
Programming control program instruction codes
Boot program
area
ID code area
(8 bytes)
User program
transfer area
66
33
30
36
32
591
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