Datasheet

Section 10 I/O Ports
Rev.7.00 Mar. 18, 2009 page 531 of 1136
REJ09B0109-0700
10.14.4 Pin Functions
Port F pins also function as the pins for external interrupt inputs, bus control signal I/Os, and
system clock outputs (φ). The correspondence between the register specification and the pin
functions is shown below.
• PF7/φ
The pin function is switched as shown below according to bit PF7DDR.
Operating
mode
1, 2, 4, 7
PF7DDR 0 1
Pin function PF7 input φ output
• PF6/AS
The pin function is switched as shown below according to the operating mode, bit EXPE, bit
ASOE, and bit PF6DDR.
Operating
mode
1, 2, 4 7
EXPE ⎯ 0 1
ASOE 1 0 ⎯ 1 0
PF6DDR ⎯ 0 1 0 1 ⎯ 0 1
Pin function AS output PF6 input PF6
output
PF6 input PF6
output
AS output PF6 input PF6
output
• PF5/RD
The pin function is switched as shown below according to the operating mode, bit EXPE, and
bit PF5DDR.
Operating
mode
1, 2, 4 7
EXPE ⎯ 0 1
PF5DDR ⎯ 0 1 ⎯
Pin function RD output PF5 input PF5 output RD output