p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 540

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Section 19 Flash Memory (0.18-µm F-ZTAT Version)
(2)
For programming 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 programming completes.
Figure 19.14 shows the procedure for programming the user MAT in user boot mode.
Rev. 1.00 Sep. 21, 2006 Page 502 of 658
REJ09B0310-0100
User MAT Programming in User Boot Mode
Figure 19.14 Procedure for Programming User MAT in User Boot Mode
JSR FTDAR setting + 32
Select on-chip program
to be downloaded and
and bus master operation
destination by FTDAR
Set SCO to 1 and
execute download
Set FKEY to H'A5
specify download
procedure program
Clear FKEY to 0
Set the FPEFEQ
Start programming
Disable interrupts
Initialization
other than CPU
parameter
DPFR = 0?
FPFR = 0?
1
Yes
Yes
Initialization error processing
Download error processing
No
No
User-boot-MAT
selection state
Note: *
No
The MAT must be switched by FMATS
to perform the programming error processing
in the user boot MAT.
JSR FTDAR setting + 16
Set FMATS to value other than
ER1 (FMPAR and FMPDR)
Set parameter to ER0 and
Set FMATS to H'AA to
select user boot MAT
H'AA to select user MAT
Set FKEY to H'5A
Clear FKEY to 0
procedure program
Programming
End programming
programming is
Required data
FPFR = 0?
completed?
1
Yes
Yes
Clear FKEY and programming
No
error processing*
switchover
switchover
MAT
MAT