r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 961

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

(3) User MAT Erasing in User Boot Mode
For erasing the user MAT in user boot mode, additional processing made by setting FMATS
are 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 22.15 shows the procedure for erasing the user MAT in user boot mode.
JSR FTDAR setting+32
set download destination
Set the FPEFEQ and
Select on-chip program
After clearing VBR,
to be downloaded and
Set FKEY to H'A5
execute download
FUBRA parameters
set SCO to 1 and
procedure program
Clear FKEY to 0
Figure 22.15 Procedure for Erasing User MAT in User Boot Mode
Initialization
Start erasing
FPFR=0 ?
DPFR=0 ?
by FTDAR
1
Yes
Yes
Initialization error processing
Download error processing
No
No
User-boot-MAT
selection state
Note: * The MAT must be switched by FMATS to perform the
No
Set FMATS to H'AA to
JSR FTDAR setting +16
erasing error processing in the user boot MAT.
Set FEBS parameter
than H'AA to select user MAT
select user boot MAT
Set FMATS to value other
procedure program
Clear FKEY to 0
Set FKEY to H'5A
block erasing is
Programming
Rev. 1.00 Sep. 21, 2007 Page 935 of 1124
End erasing
completed?
FPFR=0 ?
Required
1
Yes
Yes
Clear FKEY and erasing
error processing*
No
Section 22 Flash Memory
switchover
switchover
MAT
MAT
REJ09B0402-0100