HD6413008F RENESAS [Renesas Technology Corp], HD6413008F Datasheet - Page 190

• Manufacturer Part Number: HD6413008F
• Description: Renesas 16-Bit Single-Chip Microcomputer H8 Family/H8/300H Series
• Manufacturer: RENESAS [Renesas Technology Corp]

7. I/O Ports
Port 4 Data Register (P4DR): P4DR is an 8-bit readable/writable register that stores output data
for port 4. When port 4 functions as an output port, the value of this register is output. When a bit
in P4DDR is set to 1, if port 4 is read the value of the corresponding P4DR bit is returned. When a
bit in P4DDR is cleared to 0, if port 4 is read the corresponding pin logic level is read.
P4DR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Port 4 Input Pull-Up MOS Control Register (P4PCR): P4PCR is an 8-bit readable/writable
register that controls the MOS input pull-up transistors in port 4.
In 8-bit bus mode in modes 1 to 4 (expanded modes), when a P4DDR bit is cleared to 0 (selecting
generic input), if the corresponding P4PCR bit is set to 1, the input pull-up MOS transistor is
turned on.
P4PCR is initialized to H'00 by a reset and in hardware standby mode. In software standby mode it
retains its previous setting.
Rev.4.00 Aug. 20, 2007 Page 146 of 638
REJ09B0395-0400
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
P4 PCR
R/W
R/W
P4
7
7
0
7
0
7
P4 PCR
R/W
R/W
P4
6
6
0
6
0
6
Port 4 input pull-up MOS control 7 to 0
These bits control input pull-up MOS transistors built into port 4
P4 PCR
R/W
R/W
P4
5
5
0
5
0
5
Port 4 data 7 to 0
These bits store data for port 4 pins
P4 PCR
R/W
R/W
P4
4
4
0
4
0
4
P4 PCR
R/W
R/W
P4
3
3
0
3
0
3
P4 PCR
R/W
R/W
P4
2
2
0
2
0
2
P4 PCR
R/W
R/W
P4
1
1
0
1
0
1
P4 PCR
R/W
R/W
P4
0
0
0
0
0
0