h8s-2172 Renesas Electronics Corporation., h8s-2172 Datasheet - Page 266

• Manufacturer Part Number: h8s-2172
• Description: Renesas 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.
8.4.3
PORT4 shows the pin states of the port 4. PORT4 cannot be modified.
Note:
Rev. 2.00, 03/04, page 234 of 534
Bit
7
6
5
4
3
2
1
0
Bit
7
6
5
4
3
2
1
0
Bit Name
P47DR
P46DR
P45DR
P44DR
P43DR
P42DR
P41DR
P40DR
Bit Name
P47
P46
P45
P44
P43
P42
P41
P40
*
Port 4 Data Register (P4DR)
Port 4 Register (PORT4)
Determined by the states of pins P47 to P40.
Initial
Value
0
0
0
0
0
0
0
0
Initial
Value
*
*
*
*
*
*
*
*
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
Description
Output data for a pin is stored when the pin function is
specified to a general purpose output.
Description
If a PORT4 read is performed while P4DDR bits are set
to 1, the P4DR values are read. If a PORT4 read is
performed while P4DDR bits are cleared to 0, the pin
states are read.