HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 115

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

3.2
3.2.1
MDCR is an 8-bit read-only register that indicates the current operating mode of the H8S/2245
Group.
Bit 7—Reserved: Read-only bit, always read as 1.
Bits 6 to 3—Reserved: Read-only bits, always read as 0.
Bits 2 to 0—Mode Select 2 to 0 (MDS2 to MDS0): These bits indicate the input levels at pins
MD
MDS2 to MDS0 are read-only bits-they cannot be written to. The mode pin (MD
levels are latched into these bits when MDCR is read. These latches are canceled by a power-on
reset, but are retained after a manual reset.
3.2.2
SYSCR is an 8-bit readable/writable register that selects the interrupt control mode, the detected
edge for NMI, and enable or disable the on-chip RAM.
SYSCR is initialized to H'01 by a reset and in hardware standby mode. It is not initialized in
software standby mode.
Bit 7—Reserved: This bit can be read or written, but does not affect operation.
Bit
Initial value
R/W
Bit
Initial value
R/W
Note: * Determined by pins MD
2
to MD
Register Descriptions
Mode Control Register (MDCR)
System Control Register (SYSCR)
0
(the current operating mode). Bits MDS2 to MDS0 correspond to MD
:
:
:
:
:
:
R/W
—
—
—
7
1
7
0
—
—
—
—
6
0
6
0
2
to MD
INTM1
R/W
—
—
5
0
5
0
0
.
INTM0
R/W
—
—
4
0
4
0
NMIEG
Rev.3.00 Mar. 26, 2007 Page 73 of 772
R/W
—
—
3
0
3
0
Section 3 MCU Operating Modes
MDS2
—*
—
—
R
2
2
0
MDS1
REJ09B0355-0300
—*
—
—
R
1
2
1
0
to MD
2
to MD
RAME
MDS0
0
R/W
) input
—*
R
0
0
1
0
.