Renesas H8SX/1520 Series Hardware Manual page 622

Section 17 Flash Memory (0.18-(m F-ZTAT Version)
(5)
Flash MAT Select Register (FMATS)
FMATS selects the user MAT or user boot MAT. Writing to FMATS should be done when a
program in the on-chip RAM is being executed.
Bit
Bit Name
Initial Value
R/W
Note: * This bit is set to 1 in user boot mode, otherwise cleared to 0.
Bit Bit Name
7 MS7
6 MS6
5 MS5
4 MS4
3 MS3
2 MS2
1 MS1
0 MS0
Note: This bit is set to 1 in user boot mode, otherwise cleared to 0.
*
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7 6 5
MS7 MS6 MS5
0/1* 0 0/1*
R/W R/W R/W
Initial
Value R/W
0/1* R/W
0 R/W
0/1* R/W
0 R/W
0/1* R/W
0 R/W
0/1* R/W
0 R/W
4 3
MS4 MS3
0 0/1*
R/W R/W
Description
MAT Select
The memory MATs can be switched by writing a value
to FMATS.
When H'AA is written to FMATS, the user boot MAT is
selected. When a value other than H'AA is written, the
user MAT is selected. Switch the MATs following the
memory MAT switching procedure in section 17.11,
Switching between User MAT and User Boot MAT. The
user boot MAT cannot be selected by FMATS in user
programming mode. The user boot MAT can be
selected in boot mode or programmer mode.
H'AA: The user boot MAT is selected. (The user MAT is
selected when FMATS is a value other than
H'AA.)
(Initial value when initiated in user boot mode.)
H'00: The user MAT is selected.
(Initial value when initiated in a mode except for
user boot mode.)
2 1 0
MS2 MS1 MS0
0 0/1* 0
R/W R/W R/W