HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 107

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

Bits 7 to 0—IRQ0–IRQ7 Sense Select (IRQ0S–IRQ7S): These bits set the IRQ0–IRQ7
interrupt request detection mode.
6.3.3
The ISR is a 16-bit register that indicates the interrupt request status of the external interrupt input
pins IRQ0–IRQ7. When IRQ interrupts are set to edge detection, held interrupt requests can be
withdrawn by writing a 0 to IRQnF after reading an IRQnF = 1.
A power-on reset initializes ISR but the standby mode does not.
Bits 15 to 8—Reserved: These bits always read as 0. The write value should always be 0.
Bits 7-0: IRQ0S–IRQ7S
0
1
Initial value:
Initial value:
IRQ Status Register (ISR)
R/W:
R/W:
Bit:
Bit:
IRQ0F
R/W
15
—
R
0
7
0
Description
Interrupt request is detected on low level of IRQ input (initial value)
Interrupt request is detected on falling edge of IRQ input
IRQ1F
R/W
14
—
R
0
6
0
IRQ2F
R/W
13
—
R
0
5
0
IRQ3F
R/W
12
—
R
0
4
0
Rev. 5.00 Jan 06, 2006 page 87 of 818
IRQ4F
Section 6 Interrupt Controller (INTC)
R/W
11
—
R
0
3
0
IRQ5F
R/W
10
—
R
0
2
0
REJ09B0273-0500
IRQ6F
R/W
—
R
9
0
1
0
IRQ7F
R/W
—
R
8
0
0
0