57
3.2 Mode Control Register (MDCR)
MDCR is an 8-bit read-only register that indicates the current operating mode of the H8/3022
Series.
Bit
Initial value
Read/Write
7
—
1
—
6
—
1
—
5
—
0
—
4
—
0
—
3
—
0
—
0
MDS0
—
R
2
MDS2
—
R
1
MDS1
—
R
*
*
*
Mode select 2 to 0
Bits indicating the current
operating mode
Reserved bits
Note: Determined by pins MD to MD .
2
0
Bits 7 and 6—Reserved: These bits cannot be modified and are always read as 1.
Bits 5 to 3—Reserved: These bits cannot be modified and are always read as 0.
Bits 2 to 0—Mode Select 2 to 0 (MDS
2
to MDS
0
): These bits indicate the logic levels at pins
MD
2
to MD
0
(the current operating mode). MDS
2
to MDS
0
correspond to MD
2
to MD
0
. MDS
1
and
MDS
0
are read-only bits. The mode pin (MD
2
to MD
0
) levels are latched when MDCR is read.