376
10.9.2
Register Configuration
Table 10-14 shows the port C register configuration.
Table 10-14 Port C Registers
Name
Abbreviation
R/W
Initial Value
Address
*
Port C data direction register
PCDDR
W
H'00
H'FE3B
Port C data register
PCDR
R/W
H'00
H'FF0B
Port C register
PORTC
R
Undefined
H'FFBB
Port C MOS pull-up control register
PCPCR
R/W
H'00
H'FE42
Port C open-drain control register
PCODR
R/W
H'00
H'FE49
Note:
*
Lower 16 bits of the address.
Port C Data Direction Register (PCDDR)
Bit
:
7
6
5
4
3
2
1
0
PC7DDR PC6DDR PC5DDR PC4DDR PC3DDR PC2DDR PC1DDR PC0DDR
Initial value :
0
0
0
0
0
0
0
0
R/W
:
W
W
W
W
W
W
W
W
PCDDR is an 8-bit write-only register, the individual bits of which specify input or output for the
pins of port C. PCDDR cannot be read; if it is, an undefined value will be read.
PCDDR is initialized to H'00 by a power-on reset, and in hardware standby mode. It retains its
prior state by a manual reset or in software standby mode. The OPE bit in SBYCR is used to select
whether the address output pins retain their output state or become high-impedance when the
mode is changed to software standby mode.
•
Modes 4 and 5
The corresponding port C pins are address outputs irrespective of the value of the PCDDR bits.
•
Mode 6
Setting a PCDDR bit to 1 makes the corresponding port C pin an address output, while
clearing the bit to 0 makes the pin an input port.
•
Mode 7
Setting a PCDDR bit to 1 makes the corresponding port C pin an output port, while clearing
the bit to 0 makes the pin an input port.
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 ...