D12320VF25V Datasheet, PDF (733/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
Bit 0—Source Program Copy Operation (SCO): Requests the on-chip programming/erasing
program to be downloaded to the on-chip RAM.
When this bit is set to 1, the on-chip program which is selected by FPCS/FECS is automatically
downloaded in the on-chip RAM area specified by FTDAR.
In order to set this bit to 1, RAM emulation state must be canceled, H'A5 must be written to
FKEY, and this operation must be in the on-chip RAM.
Four NOP instructions must be executed immediately after setting this bit to 1.
Since this bit is cleared to 0 when download is completed, this bit cannot be read as 1.
All interrupts are prohibited during programming and erasing. Interrupts must not occur in the user
system.
Bit 0
SCO
0
1
Description
Download of the on-chip programming/erasing program to the on-chip RAM is not
executed
(Initial value)
[Clear condition] When download is completed
Request that the on-chip programming/erasing program is downloaded to the on-
chip RAM is occurred
[Set conditions] When all of the following conditions are satisfied and 1 is written to
this bit
• FKEY is written to H'A5
• During execution in the on-chip RAM
• Not in RAM emulation mode (RAMS in RAMER = 0)
Rev.7.00 Feb. 14, 2007 page 699 of 1108
REJ09B0089-0700