Section 9 I/O Ports
Rev. 3.00 Jan 25, 2006 page 223 of 872
REJ09B0286-0300
9.4.1
Port 4 Data Direction Register (P4DDR)
The individual bits of P4DDR specify input or output for the pins of port 4.
Bit
Bit Name
Initial Value
R/W
Description
7
P47DDR
0
W
6
P46DDR
0
W
5
P45DDR
0
W
4
P44DDR
0
W
3
P43DDR
0
W
2
P42DDR
0
W
1
P41DDR
0
W
0
P40DDR
0
W
If port 4 pins are specified for use as the general
I/O port, the corresponding port 4 pins are output
ports when the P4DDR bits are set to 1, and input
ports when cleared to 0.
9.4.2
Port 4 Data Register (P4DR)
P4DR stores output data for the port 4 pins.
Bit
Bit Name
Initial Value
R/W
Description
7
P47DR
0
R/W
6
P46DR
0
R/W
5
P45DR
0
R/W
4
P44DR
0
R/W
3
P43DR
0
R/W
2
P42DR
0
R/W
1
P41DR
0
R/W
0
P40DR
0
R/W
P4DR stores output data for the port 4 pins that
are used as the general output port.
If a port 4 read is performed while the P4DDR bits
are set to 1, the P4DR values are read. If a port 4
read is performed while the P4DDR bits are
cleared to 0, the pin states are read.
Содержание H8S/2158
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Страница 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...