SH7055S Datasheet, PDF (812/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

(2) Programming Procedure in User Program Mode
The procedures for download, initialization, and programming are shown in figure 22.11.
Start programming
procedure program
Select on-chip program
to be downloaded and
set download destination
by FTDAR
(2.1)
Set FKEY to H'A5
After clearing VBR,
set SCO to 1 and
execute download
(2.2)
(2.3)
Clear FKEY to 0
(2.4)
DPFR=0?
Yes
(2.5)
No
Download error processing
Set the FPEFEQ and
FUBRA parameters
(2.6)
Initialization
JSR FTDAR setting+32 (2.7)
FPFR=0?
Yes
1
(2.8)
No
Initialization error processing
1
Set FKEY to H'5A
(2.9)
Set parameter to R4 and
R5 (FMPAR and FMPDR)
(2.10)
Programming
JSR FTDAR setting+16
(2.11)
FPFR=0?
(2.12)
No
Yes
Clear FKEY and
programming
error processing
No
Required data
programming is
(2.13)
completed?
Yes
Clear FKEY to 0
(2.14)
End programming
procedure program
Figure 22.11 Programming Procedure
The details of the programming procedure are described below. The procedure program must be
executed in an area other than the flash memory to be programmed. Especially the part where the
SCO bit in FCCS is set to 1 for downloading must be executed in the on-chip RAM.
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 22.10.3, Storable Area for Procedure Program and
Programming Data.
The following description assumes the area to be programmed on the user MAT is erased and
program data is prepared in the consecutive area. When erasing has not been executed, carry out
erasing before writing.
128-byte programming is performed in one program processing. When more than 128-byte
programming is performed, programming destination address/program data parameter is updated
in 128-byte units and programming is repeated.
Rev.2.0, 07/03, page 774 of 960