HD643303x Hitachi, HD643303x Datasheet - Page 545

• Manufacturer Part Number: HD643303x
• Description: Hitachi Microcomputer
• Manufacturer: Hitachi

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