HD64F3028F25 Datasheet, PDF (89/925 Pages) Renesas Technology Corp – Hardware Manual Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series

3.2 Mode Control Register (MDCR)
MDCR is an 8-bit read-only register that indicates the current operating mode of the
H8/3028 Group.
Bit
7
6
5
4
3
2
1
0
—
—
—
—
— MDS2 MDS1 MDS0
Initial value
1
1
0
0
0
—*
—*
—*
Read/Write
—
—
—
—
—
R
R
R
Reserved bits
Reserved bits
Mode select 2 to 0
Bits indicating the current
operating mode
Note: * Determined by pins MD₂ to MD₀.
Bits 7 and 6—Reserved: These bits can not be modified and are always read as 1.
Bits 5 to 3—Reserved: These bits can not be modified and are always read as 0.
Bits 2 to 0—Mode Select 2 to 0 (MDS2 to MDS0): These bits indicate the logic levels at pins
MD₂ to MD₀ (the current operating mode). MDS2 to MDS0 correspond to MD₂ to MD₀. MDS2 to
MDS0 are read-only bits. The mode pin (MD₂ to MD₀) levels are latched into these bits when
MDCR is read.
Rev. 2.00, 09/03, page 57 of 890