Datasheet

Section 10 I/O Ports
Rev. 6.00 Mar. 18, 2010 Page 350 of 982
REJ09B0054-0600
10.11 Port F
Port F is an 8-bit I/O port and has the following registers.
• Port F data direction register (PFDDR)
• Port F data register (PFDR)
• Port F register (PORTF)
10.11.1 Port F Data Direction Register (PFDDR)
PFDDR specifies input or output of the port F pins using the individual bits. PFDDR cannot be
read; if it is, an undefined value will be read. This register is a write-only register, and cannot be
written by bit manipulation instruction. For details, see section 2.9.4, Access Methods for
Registers with Write-Only Bits.
Bit Bit Name Initial Value R/W Description
7 PF7DDR 0/1
*
W
6 PF6DDR 0 W
5 PF5DDR 0 W
4 PF4DDR 0 W
3 PF3DDR 0 W
2 PF2DDR 0 W
1 PF1DDR 0 W
When a pin is specified as a general purpose I/O port,
setting this bit to 1 makes the corresponding port F
pin an output port. Clearing this bit to 0 makes the pin
an input port.
0 PF0DDR 0 W
Note: * In modes 4 to 6, initial value is 1. In mode 7, initial value is 0.