External Interrupt Pin In Software Standby Mode And Watch Mode; Noise Canceller Switching; Irq Status Register (Isr) - Renesas H8S/2100 Series Hardware Manual

5.8.5

External Interrupt Pin in Software Standby Mode and Watch Mode

• When the pins (IRQ15 to IRQ0, ExIRQ15 to ExIRQ6, KIN15 to KIN0, and WUE15 to
WUE8) are used as external input pins in software standby mode or watch mode, the pins
should not be left floating.
• When the external interrupt pins (IRQ7, IRQ6, ExIRQ15 to ExIRQ8, KIN7 to KIN0, and
WUE15 to WUE8) are used in software standby and watch modes, the noise canceller should
be disabled.
5.8.6

Noise Canceller Switching

The noise canceller should be switched when the external input pins (IRQ7, IRQ6, ExIRQ15 to
ExIRQ8, KIN7 to KIN0, and WUE15 to WUE8) are high.
5.8.7

IRQ Status Register (ISR)

Since IRQnF may be set to 1 according to the pin state after reset, the ISR should be read after
reset, and then write 0 in IRQnF (n = 15 to 0).
Section 5 Interrupt Controller
Rev. 1.00 Apr. 28, 2008 Page 131 of 994
REJ09B0452-0100