Section 8
I/O Ports
Rev. 1.00 Mar. 12, 2008 Page 207 of 1178
REJ09B0403-0100
Bit
Bit Name
Initial Value
R/W Description
3 P43DDR
0
W
2 P42DDR
0
W
1 P41DDR
0
W
0 P40DDR
0
W
•
Normal extended mode (16-bit bus)
These bits have no effect on operation.
•
Other modes
If port 4 pins are specified for use as the general I/O
port, the corresponding pins function as output port
when the P4DDR bits are set to 1, and as input port
when cleared to 0.
(2)
Port 4 Data Register (P4DR)
P4DR stores output data for the port 4 pins. P4DR is initialized only by a system reset, and retains
the value even if an internal reset signal of the WDT is generated.
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
These bits store output data for the port 4 pins that are
used as the general output port.
If this register is read, the P4DR values are read for the
bits with the corresponding P4DDR bits set to 1. For the
bits with the corresponding P4DDR bits cleared to 0,
the pin states are read.
3 P43DR 0
R/W
2 P42DR 0
R/W
1 P41DR 0
R/W
0 P40DR 0
R/W
•
Normal extended mode (16-bit data bus)
Since the corresponding pins function as
bidirectional data bus pins, the value in these bits
has no effect on operation.
If this register is read, the P4DR values are read for
the bits with the corresponding P4DDR bits set to 1.
For the bits with the corresponding P4DDR bits
cleared to 0, 1 is read.
•
Other modes
These bits store output data for the port 4 pins that
are used as the general output port.
If this register is read, the P4DR values are read for
the bits with the corresponding P4DDR bits set to 1.
For the bits with the corresponding P4DDR bits
cleared to 0, the pin states are read.
Summary of Contents for H8S Family
Page 2: ...Rev 1 00 Mar 12 2008 Page ii of xIviii...
Page 8: ...Rev 1 00 Mar 12 2008 Page viii of xIviii...
Page 28: ...Rev 1 00 Mar 12 2008 Page xxviii of xIviii...
Page 48: ...Rev 1 00 Mar 12 2008 Page xlviii of xIviii...
Page 70: ...Section 1 Overview Rev 1 00 Mar 12 2008 Page 22 of 1178 REJ09B0403 0100...
Page 108: ...Section 2 CPU Rev 1 00 Mar 12 2008 Page 60 of 1178 REJ09B0403 0100...
Page 116: ...Section 3 MCU Operating Modes Rev 1 00 Mar 12 2008 Page 68 of 1178 REJ09B0403 0100...
Page 152: ...Section 5 Interrupt Controller Rev 1 00 Mar 12 2008 Page 104 of 1178 REJ09B0403 0100...
Page 206: ...Section 6 Bus Controller BSC Rev 1 00 Mar 12 2008 Page 158 of 1178 REJ09B0403 0100...
Page 420: ...Section 9 14 Bit PWM Timer PWMX Rev 1 00 Mar 12 2008 Page 372 of 1178 REJ09B0403 0100...
Page 476: ...Section 12 Watchdog Timer WDT Rev 1 00 Mar 12 2008 Page 428 of 1178 REJ09B0403 0100...
Page 552: ...Section 14 CRC Operation Circuit CRC Rev 1 00 Mar 12 2008 Page 504 of 1178 REJ09B0403 0100...
Page 712: ...Section 18 I2 C Bus Interface IIC Rev 1 00 Mar 12 2008 Page 664 of 1178 REJ09B0403 0100...
Page 804: ...Section 19 LPC Interface LPC Rev 1 00 Mar 12 2008 Page 756 of 1178 REJ09B0403 0100...
Page 838: ...Section 20 Ethernet Controller EtherC Rev 1 00 Mar 12 2008 Page 790 of 1178 REJ09B0403 0100...
Page 964: ...Section 24 RAM Rev 1 00 Mar 12 2008 Page 916 of 1178 REJ09B0403 0100...
Page 1066: ...Section 25 Flash Memory Rev 1 00 Mar 12 2008 Page 1018 of 1178 REJ09B0403 0100...
Page 1098: ...Section 26 Boundary Scan JTAG Rev 1 00 Mar 12 2008 Page 1050 of 1178 REJ09B0403 0100...
Page 1226: ...Rev 1 00 Mar 12 2008 Page 1178 of 1178 REJ09B0403 0100...
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Page 1230: ...H8S 2472 Group H8S 2462 Group Hardware Manual...