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Except for MAT switching, the programming procedure is the same as that in user program mode.
The area that can be executed in the steps of the user procedure program (on-chip RAM, user
MAT, and external space) is shown in section 20.4.4, Storable Area for Procedure Program and
Program Data.
(3) User MAT Erasing in User Boot Mode
For erasing the user MAT in user boot mode, additional processing made by setting FMATS is
required: switching from user-boot-MAT selection state to user-MAT selection state, and
switching back to user-boot-MAT selection state after erasing completes.
Figure 20.15 shows the procedure for erasing the user MAT in user boot mode.
Start erasing
procedure program
Select on-chip program
to be downloaded and
specify download
destination by FTDAR
Set FKEY to H'A5
Set SCO to 1 and
execute download
Clear FKEY to 0
DPFR = 0 ?
Set the FPEFEQ
parameter
Initialization
JSR FTDAR setting + 32
FPFR = 0 ?
Disable interrupts
and bus master operation
other than CPU
Figure 20.15 Procedure for Erasing User MAT in User Boot Mode
No
Yes
Download error processing
No
Yes
Initialization error processing
User-boot-MAT
1
selection state
1
Set FMATS to value other
than H'AA to select user MAT
Set FKEY to H'5A
Set FEBS parameter
Programming
JSR FTDAR setting + 16
FPFR = 0 ?
Yes
Required
No
block erasing is
completed?
Yes
Clear FKEY to 0
Set FMATS to H'AA to
select user boot MAT
End erasing
procedure program
Note:
The MAT must be switched by FMATS to perform
*
the erasing error processing in the user boot MAT.
Rev. 1.00, 09/03, page 567 of 704
MAT
switchover
No
Clear FKEY and erasing
error processing*
MAT
switchover
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