Datasheet

Section 10 I/O Ports
Rev. 3.00 Mar 17, 2006 page 483 of 926
REJ09B0283-0300
• P80/(IRQ0)/EDREQ2
The pin function is switched as shown below according to the combination of bit P80DDR and
bit ITS0 in ITSR.
P80DDR 0 1
P80 input P80 output
EDREQ2 input
Pin function
IRQ0 interrupt input
*
Note: * IRQ0 input when ITS0 = 1.
10.9 Port A
Port A is an 8-bit I/O port that also has other functions. The port A has the following registers.
• Port A data direction register (PADDR)
• Port A data register (PADR)
• Port A register (PORTA)
• Port A pull-up MOS control register (PAPCR)
• Port A open-drain control register (PAODR)
• Port function control register 1 (PFCR1)