Datasheet

Section 8 I/O Ports
Rev. 4.00 Sep 27, 2006 page 263 of 1130
REJ09B0327-0400
Pin Selection Method and Pin Functions
P94/HWR/IOW The pin function is switched as shown below according to the combination of
operating mode, bit HI12E in SYSCR2, and bit P94DDR.
Operating
mode
Modes 1, 2, 3
(EXPE = 1)
Modes 2, 3 (EXPE = 0)
HI12E — 01
P94DDR — 01—
Pin function HWR
output pin
P94
input pin
P94
output pin
IOW
input pin
P93/RD/IOR The pin function is switched as shown below according to the combination of
operating mode, bit HI12E in SYSCR2, and bit P93DDR.
Operating
mode
Modes 1, 2, 3
(EXPE = 1)
Modes 2, 3 (EXPE = 0)
HI12E — 01
P93DDR — 01—
Pin function RD output pin P93 input pin P93 output pin IOR input pin
P92/IRQ0 P92DDR 0 1
Pin function P92 input pin P92 output pin
IRQ0 input pin
When bit IRQ0E in IER is set to 1, this pin is used as the IRQ0 input pin.
P91/IRQ1 P91DDR 0 1
Pin function P91 input pin P91 output pin
IRQ1 input pin
When bit IRQ1E in IER is set to 1, this pin is used as the IRQ1 input pin.