MC9S08QE16CLC Datasheet, PDF (216/350 Pages) Freescale Semiconductor, Inc – Low-power wireless applications, Gas, water and heater meters

Keyboard Interrupt (S08KBIV1)
12.3.3 KBI Interrupt Controls
The KBF status flag becomes set (1) when an edge event has been detected on any KBI input pin. If
KBIE = 1 in the KBISC register, a hardware interrupt will be requested whenever KBF = 1. The KBF flag
is cleared by writing a 1 to the keyboard acknowledge (KBACK) bit.
When KBIMOD = 0 (selecting edge-only operation), KBF is always cleared by writing 1 to KBACK.
When KBIMOD = 1 (selecting edge-and-level operation), KBF cannot be cleared as long as any keyboard
input is at its asserted level.
MC9S08AC60 Series Data Sheet, Rev. 3
216
Freescale Semiconductor