3069RF-ZTAT Datasheet, PDF (81/1003 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER

3.2 Mode Control Register (MDCR)
MDCR is an 8-bit read-only register that indicates the current operating mode of the
H8/3069R.
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
Note: * Determined by pins MD₂ to MD₀.
Mode select 2 to 0
Bits indicating the current
operating mode
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.
Note: A product with on-chip flash memory can operate in boot mode in which flash memory
can be programmed. In boot mode, the MDS2 bit indicates the logic level at pin MD₂.
Rev. 5.0, 09/04, page 59 of 978