Rev. 5.00, 12/03, page 72 of 1088
Do not change the inputs at the mode pins during operation.
3.1.3
Register Configuration
The H8S/2319 and H8S/2318 Groups have a mode control register (MDCR) that indicates the
inputs at the mode pins (MD2 to MD0), and a system control register (SYSCR) and system control
register 2 (SYSCR2)*
2
that control the operation of the chip. Table 3-3 summarizes these registers.
Table 3-3
Registers
Name
Abbreviation
R/W
Initial Value
Address
*
1
Mode control register
MDCR
R
Undefined
H'FF3B
System control register
SYSCR
R/W
H'01
H'FF39
System control register 2
*
2
SYSCR2
R/W
H'00
H'FF42
Notes: 1. Lower 16 bits of the address.
2. The SYSCR2 register can only be used in the F-ZTAT versions. In the mask ROM and
ROMless versions this register will return an undefined value if read, and cannot be
modified.
3.2
Register Descriptions
3.2.1
Mode Control Register (MDCR)
Bit
:
7
6
5
4
3
2
1
0
—
—
—
—
—
MDS2
MDS1
MDS0
Initial value :
1
0
0
0
0
—
*
—
*
—
*
R/W
:
—
—
—
—
—
R
R
R
Note:
*
Determined by pins MD2 to MD0.
MDCR is an 8-bit read-only register that indicates the current operating mode of the H8S/2319
and H8S/2318 Group chips.
Bit 7—Reserved: This bit is always read as 1, and cannot be modified.
Bits 6 to 3—Reserved: These bits are always read as 0, and cannot be modified.
Bits 2 to 0—Mode Select 2 to 0 (MDS2 to MDS0): These bits indicate the input levels at pins
MD2 to MD0 (the current operating mode). Bits MDS2 to MDS0 correspond to pins MD2 to
MD0. MDS2 to MDS0 are read-only bits, and cannot be written to. The mode pin (MD2 to MD0)
input levels are latched into these bits when MDCR is read. These latches are canceled by a reset.
Содержание H8S/2318 series
Страница 2: ......
Страница 6: ...Rev 5 00 12 03 page vi of xxx...
Страница 12: ...Rev 5 00 12 03 page xii of xxx...
Страница 30: ...Rev 5 00 12 03 page xxx of xxx...
Страница 54: ...Rev 5 00 12 03 page 24 of 1088...
Страница 98: ...Rev 5 00 12 03 page 68 of 1088...
Страница 128: ...Rev 5 00 12 03 page 98 of 1088...
Страница 138: ...Rev 5 00 12 03 page 108 of 1088...
Страница 168: ...Rev 5 00 12 03 page 138 of 1088...
Страница 212: ...Rev 5 00 12 03 page 182 of 1088...
Страница 324: ...Rev 5 00 12 03 page 294 of 1088...
Страница 436: ...Rev 5 00 12 03 page 406 of 1088...
Страница 546: ...Rev 5 00 12 03 page 516 of 1088...
Страница 580: ...Rev 5 00 12 03 page 550 of 1088...
Страница 822: ...Rev 5 00 12 03 page 792 of 1088...
Страница 876: ...Rev 5 00 12 03 page 846 of 1088...
Страница 901: ...Rev 5 00 12 03 page 871 of 1088 A 2 Instruction Codes Table A 2 shows the instruction codes...
Страница 1121: ...H8S 2319 Group H8S 2318 Group Hardware Manual REJ09B0089 0500O...