HD643303x Hitachi, HD643303x Datasheet - Page 72

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

3.2 Mode Control Register (MDCR)
MDCR is an 8-bit read-only register that indicates the current operating mode of the H8/3032
Series.
Bits 7 and 6—Reserved: Read-only bits, always read as 1.
Bits 5 to 3—Reserved: Read-only bits, always read as 0.
Bit 2—Reserved: Read-only bit, always read as 1.
Bits 1 and 0—Mode Select 1 and 0 (MDS1 and MDS0): These bits indicate the logic levels at
pins MD
MD
when MDCR is read.
Bit
Initial value
Read/Write
Note:
0
. MDS1 and MDS0 are read-only bits. The mode pin (MD
*
1
Determined by pins MD and MD .
and MD
0
(the current operating mode). MDS1 and MDS0 correspond to MD
—
—
7
1
—
—
6
1
1
Reserved bits
—
—
5
0
0
57
—
—
4
0
—
—
3
0
1
and MD
—
—
2
1
Mode select 1 and 0
Bits indicating the current
operating mode
0
) levels are latched
MDS1
—
R
1
*
1
MDS0
and
—
R
0
*