Datasheet

Section 9 I/O Ports
Rev.4.00 Nov. 02, 2005 Page 111 of 304
REJ09B0143-0400
9.5.2 Port Data Register 8 (PDR8)
PDR8 is a general I/O port data register of port 8.
Bit Bit Name Initial Value R/W Description
7
6
5



0
0
0



Reserved
4
3
2
1
0
P84
P83
P82
P81
P80
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
PDR8 stores output data for port 8 pins.
If PDR8 is read while PCR8 bits are set to 1, the value
stored in PDR8 is read. If PDR8 is read while PCR8 bits
are cleared to 0, the pin states are read regardless of the
value stored in PDR8.
9.5.3 Pin Functions
The correspondence between the register specification and the port functions is shown below.
P84/FTIOD pin
Register TIOR1 PCR8
Bit Name IOD2 IOD1 IOD0 PCR84 Pin Function
Setting Value 0 0 0 0 P84 input/FTIOD input pin
1 P84 output/FTIOD input pin
0 0 1 X FTIOD output pin
0 1 X X FTIOD output pin
1 X X 0 P84 input/FTIOD input pin
1 P84 output/FTIOD input pin
Legend: X: Don't care.