Datasheet

Section 10B I/O Ports
(H8S/2695)
R01UH0166EJ0600 Rev. 6.00 Page 517 of 1434
Mar 02, 2011
H8S/2633 Group, H8S/2633 F-ZTAT
TM
,
H8S/2633R F-ZTAT
TM
, H8S/2695
10B.9.2 Register Configuration
Table 10B.16 shows the port C register configuration.
Table 10B.16 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.