HD64F3039F18 Datasheet, PDF (677/710 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Series

ISR—IRQ Status Register
Bit
7
6
—
—
Initial value
0
0
Read/Write
—
—
Appendix B Internal I/O Register Field
H'F6
Interrupt controller
5
4
3
IRQ5F IRQ4F —
0
0
0
R/(W)* R/(W)* —
2
1
0
— IRQ1F IRQ0F
0
0
0
— R/(W)* R/(W)*
IRQ₅, IRQ₄, IRQ₁ and IRQ₀ flags
Bits 5, 4, 1 and 0
IRQ5F
IRQ4F
IRQ1F
IRQ0F
Setting and Clearing Conditions
0
[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.
Note: n = 5, 4, 1 and 0
Note: * Only 0 can be written to clear the flag.
Rev.3.00 Mar. 26, 2007 Page 653 of 682
REJ09B0353-0300