p2125vps20 Renesas Electronics Corporation., p2125vps20 Datasheet - Page 205

• Manufacturer Part Number: p2125vps20
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

8.4.2
P4DR stores output data for the port 4 pins.
Note:
8.4.3
P4PCR controls the on/off state of the input pull-up MOS for port 4 pins.
7
6
5
4
3
2
1
0
7, 6
5
4
3
2 to 0
Bit
Bit
*
Bit Name
P47DR
P46DR
P45DR
P44DR
P43DR
P42DR
P41DR
P40DR
Bit Name

P45PCR
P44PCR
P43PCR

Port 4 Data Register (P4DR)
Port 4 Pull-Up MOS Control Register (P4PCR)
Undefined value is determined depends on P46 pin state.
Initial
Value
0
Undefined* R/W
0
0
0
0
0
0
Initial
Value
All 0
0
0
0
All 0
R/W

R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
P4DR stores output data other than the bit 6 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.
Description
Reserved
The initial value should not be changed.
When the pins are in input state, the corresponding input
pull-up MOS is turned on when a P4PCR bit is set to 1.
Reserved
The initial value should not be changed.
Rev. 1.00 Sep. 21, 2006 Page 167 of 658
Section 8 I/O Ports
REJ09B0310-0100