D12320VF25V Datasheet, PDF (736/1146 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 17 ROM
(5) Flash MAT Select Register (FMATS)
FMATS specifies whether user MAT or user boot MAT is selected.
Bit
:7
MS7
Initial value : 0
Initial value : 1
R/W
: R/W
6
MS6
0
0
R/W
5
MS5
0
1
R/W
4
MS4
0
0
R/W
3
MS3
0
1
R/W
2
MS2
0
0
R/W
1
MS1
0
1
R/W
0
MS0
0 (When not in user boot mode)
0 (When in user boot mode)
R/W
Bits 7 to 0—MAT Select (MS7 to MS0): These bits are in user-MAT selection state when the
value other than H'AA is written and in user-boot-MAT selection state when H'AA is written.
The MAT is switched by writing the value in FMATS.
When the MAT is switched, follow section 17.27, Switching between User MAT and User Boot
MAT. (The user boot MAT cannot be programmed in user programming mode if user boot MAT
is selected by FMATS. The user boot MAT must be programmed in boot mode or in PROM
mode.)
Bits 7 to 0
MS7 to MS0 Description
H'AA
The user boot MAT is selected (in user-MAT selection state when the value of these
bits are other than H'AA)
Initial value when these bits are initiated in user boot mode.
H'00
Initial value when these bits are initiated in a mode except for user boot mode (in
user-MAT selection state)
[Programmable condition] These bits are in the execution state in the on-chip RAM.
Rev.7.00 Feb. 14, 2007 page 702 of 1108
REJ09B0089-0700