HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 296

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 8 I/O Ports
8.9.2
Table 8.15 shows the port C register configuration.
Table 8.15 Port C Registers
Name
Port C data direction register
Port C data register
Port C register
Port C MOS pull-up control register
Note:
Port C Data Direction Register (PCDDR)
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.
This register is a write-only register, and cannot be written by bit manipulation instruction. For
details, see section 2.10.4, Access Methods for Registers with Write-Only Bits.
PCDDR is initialized to H'00 by a power-on reset and in hardware standby mode. It retains its
prior state after a manual reset, and 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 a
transition is made to software standby mode.
Rev.3.00 Mar. 26, 2007 Page 254 of 772
REJ09B0355-0300
Bit
Initial value
R/W
Modes 1, 4, and 5
The corresponding port C pins are address outputs irrespective of the value of the PCDDR bits.
Modes 2 and 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.
Note: Modes 2 and 6 cannot be used in the H8S/2240.
* Lower 16 bits of the address.
Register Configuration
:
:
:
PC7DDR
W
7
0
PC6DDR
W
6
0
PC5DDR
PCDDR
PCPCR
Abbreviation
PCDR
PORTC
W
5
0
PC4DDR
W
4
0
R/W
W
R/W
R
R/W
PC3DDR
W
3
0
Initial Value
H'00
H'00
Undefined
H'00
PC2DDR
W
2
0
PC1DDR
W
1
0
Address*
H'FEBB
H'FF6B
H'FF5B
H'FF72
PC0DDR
W
0
0