HD6412340 HITACHI [Hitachi Semiconductor], HD6412340 Datasheet - Page 267

• Manufacturer Part Number: HD6412340
• Description: H8S/2345 F-ZTAT Hardware Manual
• Manufacturer: HITACHI [Hitachi Semiconductor]

8.8.2
Table 8.13 shows the port C register configuration.
Table 8.13 Port C Registers
Name
Port C data direction register
Port C data register
Port C register
Port C MOS pull-up control register
Note: * Lower 16 bits of the address.
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.
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.
Note: * Modes 1 to 3 are not available on the F-ZTAT version.
250
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.
Modes 3 and 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.
Modes 2, 3, 6, and 7 are not available on the ROMless version.
Register Configuration
:
:
:
PC7DDR
W
7
0
PC6DDR
W
6
0
PC5DDR
Abbreviation
PCDDR
PCDR
PORTC
PCPCR
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