68
The H8S/2633 Series can be used only in modes 4 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.
3.1.2
Register Configuration
The H8S/2633 Series has a mode control register (MDCR) that indicates the inputs at the mode
pins (MD2 to MD0), and a system control register (SYSCR) that controls the operation of the
H8S/2633 Series. Table 3-2 summarizes these registers.
Table 3-2
MCU Registers
Name
Abbreviation
R/W
Initial Value
Address
*
Mode control register
MDCR
R/W
Undetermined
H'FDE7
System control register
SYSCR
R/W
H'01
H'FDE5
Pin function control register
PFCR
R/W
H'0D/H'00
H'FDEB
Note:
*
Lower 16 bits of the address.
3.2
Register Descriptions
3.2.1
Mode Control Register (MDCR)
7
—
1
R/W
6
—
0
—
5
—
0
—
4
—
0
—
3
—
0
—
0
MDS0
—
*
R
2
MDS2
—
*
R
1
MDS1
—
*
R
Note:
*
Determined by pins MD2 to MD0.
Bit
Initial value
R/W
:
:
:
MDCR is an 8-bit register that indicates the current operating mode of the H8S/2633 Series.
Bit 7—Reserved: Only 1 should be written to this bit.
Bits 6 to 3—Reserved: These bits 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 MD2 to MD0.
MDS2 to MDS0 are read-only bits-they cannot be written to. The mode pin (MD2 to MD0) input
levels are latched into these bits when MDCR is read. These latches are cancelled by a power-on
reset, but maintained by a manual reset.
Содержание H8S/2631
Страница 28: ...xviii Appendix G Package Dimensions 1154 ...
Страница 341: ...316 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 9 8 Memory Mapping in Block Transfer Mode ...
Страница 918: ...905 ø DREQ0 DREQ1 tDRQS tDRQH Figure 25 19 DMAC DREQ Input Timing ...
Страница 955: ...943 A 2 Instruction Codes Table A 2 shows the instruction codes ...