Datasheet
Section 10 I/O Ports 
Page 570 of 1384    R01UH0310EJ0500 Rev. 5.00 
 Sep 25, 2012 
H8S/2426, H8S/2426R, H8S/2424 Group
10.3.2  Port 3 Data Register (P3DR) 
P3DR stores output data for the port 3 pins. 
Bit  Bit Name  Initial Value  R/W  Description 
7, 6  ⎯ All 0 ⎯ Reserved 
These bits are always read as 0 and cannot be 
modified. 
5 P35DR  0  R/W 
4 P34DR  0  R/W 
3 P33DR  0  R/W 
2 P32DR  0  R/W 
1 P31DR  0  R/W 
0 P30DR  0  R/W 
Output data for a pin is stored when the pin function 
is specified as a general purpose I/O. 
10.3.3  Port 3 Register (PORT3) 
PORT3 shows the pin states of port 3. PORT3 cannot be modified. 
Bit  Bit Name  Initial Value  R/W  Description 
7, 6  ⎯ Undefined ⎯ Reserved 
If these bits are read, they will return an undefined 
value. 
5 P35  ⎯* R 
4 P34  ⎯* R 
3 P33  ⎯* R 
2 P32  ⎯* R 
1 P31  ⎯* R 
0 P30  ⎯* R 
If this register is read while a P3DDR bit is set to 1, 
the corresponding P3DR value is read. If this 
register is read while a P3DDR bit is cleared to 0, 
the corresponding pin state is read. 
Note:  *  Determined by the states of pins P35 to P30. 










