HD6412350 Hitachi, HD6412350 Datasheet - Page 91

• Manufacturer Part Number: HD6412350
• Description: (HD6412350 / HD6432351) 16-BIT MICROCONTROLLER
• Manufacturer: Hitachi

The H8S/2351 can be used only in modes 1 to 7. This means that the mode pins must be set to
select one of these modes. Do not change the inputs at the mode pins during operation.
3.1.3
The H8S/2350 Series has a mode control register (MDCR) that indicates the inputs at the mode
pins (MD
H8S/2350 Series. Table 3-3 summarizes these registers.
Table 3-3
Name
Mode control register
System control register
Note: * Lower 16 bits of the address.
3.2
3.2.1
MDCR is an 8-bit read-only register that indicates the current operating mode of the H8S/2350
Series.
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.
Bit
Initial value
R/W
Note: * Determined by pins MD
2
to MD
2
Register Configuration
Register Descriptions
Mode Control Register (MDCR)
to MD
0
(the current operating mode). Bits MDS2 to MDS0 correspond to MD
MCU Registers
:
:
:
0
), and a system control register (SYSCR) that controls the operation of the
—
—
7
1
Abbreviation
MDCR
SYSCR
—
—
6
0
2
to MD
—
—
5
0
0
.
R/W
R
R/W
—
—
4
0
—
—
3
0
Initial Value
Undetermined
H'01
MDS2
—*
R
2
MDS1
—*
R
1
2
Address*
H'FF3B
H'FF39
to MD
2
to MD
MDS0
0
) input
—*
R
0
0
.
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