Mode Control Register (Mdcr)-H'ffc5 - Hitachi H8/329 Series Hardware Manual

2.3 Mode Control Register (MDCR)—H'FFC5
Bit 7
—
Initial value 1
Read/Write —
Note: * Initialized according to MD
The mode control register (MDCR) is an eight-bit register that indicates the operating mode of the
chip.
Bits 7 to 5—Reserved: These bits cannot be modified and are always read as "1."
Bits 4 and 3—Reserved: These bits cannot be modified and are always read as "0."
Bit 2—Reserved: This bit cannot be modified and is always read as "1."
Bits 1 and 0—Mode Select 1 and 0 (MDS1 and MDS0): These bits indicate the values of the
mode pins (MD and MD
1
corresponds to MD and MDS0 to MD
1
control register is read, the levels at the mode pins (MD
6 5
— —
1 1
— —
and MD inputs.
1 0
), thus indicating the current operating mode of the chip. MDS1
0
. These bits can be read but not written. When the mode
0
4 3 2
— — —
0 0 1
— — —
and MD ) are latched in these bits.
1 0
18
1 0
MDS1 MDS0
* *
R R