D12320VF25V Datasheet, PDF (822/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
Transitions to the reset state, and hardware standby mode are inhibited during
programming/erasing. When the reset signal is accidentally input to the chip, a longer period
in the reset state than usual (100 μs) is needed before the reset signal is released.
(7) Switching of the MATs by FMATS should be needed when programming/erasing of the user
boot MAT is operated in user-boot mode. The program which switches the MATs should be
executed from the on-chip RAM. See section 17.27, Switching between User MAT and User
Boot MAT. Please make sure you know which MAT is selected when switching between
them.
(8) When the data storable area indicated by programming parameter FMPDR is within the flash
memory area, an error will occur even when the data stored is normal. Therefore, the data
should be transferred to the on-chip RAM to place the address that FMPDR indicates in an
area other than the flash memory.
In consideration of these conditions, there are three factors; operating mode, the bank structure of
the user MAT, and operations.
The areas in which the programming data can be stored for execution are shown in table 17.26.
Table 17.72 Executable MAT
Operation
User Program Mode
Programming
Table 17.73 (1)
Erasing
Table 17.73 (2)
Note: * Programming/Erasing is possible to user MATs.
Initiated Modes
User Boot Mode^*
Table 17.73 (3)
Table 17.73 (4)
Rev.7.00 Feb. 14, 2007 page 788 of 1108
REJ09B0089-0700