Datasheet

Section 19 Flash Memory
Rev. 3.00 Sep. 28, 2009 Page 555 of 710
REJ09B0384-0300
Set FKEY to H'A5
DPFR = 0 ?
Yes
No
Download error processing
Set the FPEFEQ
parameters
Initialization
JSR FTDAR setting + 32
Yes
End programming
procedure program
FPFR = 0 ?
No
Initialization error processing
Disable interrupts
and bus master operation
other than CPU
Clear FKEY to 0
Set parameter to ER0 and
ER1 (FMPAR and FMPDR)
Programming
JSR FTDAR setting + 16
Yes
FPFR = 0 ?
No
Yes
Required data
programming is
completed?
No
Set FKEY to H'A5
Clear FKEY to 0
1
1
Download
Initialization
Programming
MAT
switchover
MAT
switchover
Set FMATS to value other than
H'AA to select user MAT
Set SCO to 1 and
execute download
Clear FKEY and programming
error processing
Set FMATS to H'AA to
select user boot MAT
User-boot-MAT selection state
User-MAT selection state
User-boot-MAT
selection state
Note: The MAT must be switched by FMATS
to perform the programming error
processing in the user boot MAT.
Start programming
procedure program
Select on-chip program
to be downloaded and
specify download
destination by FTDAR
Figure 19.14 Procedure for Programming User MAT in User Boot Mode
The difference between the programming procedures in user program mode and user boot mode is
whether the MAT is switched or not as shown in figure 19.14.
In user boot mode, the user boot MAT can be seen in the flash memory space with the user MAT
hidden in the background. The user MAT and user boot MAT are switched only while the user
MAT is being programmed. Because the user boot MAT is hidden while the user MAT is being
programmed, the procedure program must be located in an area other than flash memory. After
programming completes, switch the MATs again to return to the first state.
MAT switching is enabled by writing a specific value to FMATS. However note that while the
MATs are being switched, the LSI is in an unstable state, e.g. access to a MAT is not allowed until
MAT switching is completed, and if an interrupt occurs, from which MAT the interrupt vector is