HD6473032F Datasheet, PDF (545/572 Pages) Hitachi Semiconductor – Hitachi Microcomputer

ISR—IRQ Status Register
—
—
Initial value
0
0
Read/Write
—
—
H'F6 Interrupt controller
— IRQ4F IRQ3F IRQ2F IRQ1F IRQ0F
0
0
0
0
0
0
— R/(W)* R/(W)* R/(W)* R/(W)* R/(W)*
IRQ₄ to IRQ ₀ flags
Bits 4 to 0
IRQ4F to IRQ0F
0
Setting and Clearing Conditions
[Clearing conditions]
Read IRQnF when IRQnF = 1, then write 0 in IRQnF.
IRQnSC = 0, IRQn input is high, and interrupt exception
handling is carried out.
IRQnSC = 1 and IRQn interrupt exception handling is
carried out.
1
[Setting conditions]
IRQnSC = 0 and IRQn input is low.
IRQnSC = 1 and IRQn input changes from high to low.
(n = 4 to 0)
Note: * Only 0 can be written, to clear the flag.
530