Datasheet

Section 5 Interrupt Controller
Rev.7.00 Mar. 18, 2009 page 136 of 1136
REJ09B0109-0700
5.7.6 IRQ Status Register (ISR)
Depending on the pin status following a reset, IRQnF may be set to 1. Therefore, always read ISR
and clear it to 0 after resets.