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110
•
Bit 8—NMI Edge Select (NMIE)
Bit 8: NMIE
Description
0
Interrupt request is detected on falling edge of NMI input (initial value)
1
Interrupt request is detected on rising edge of NMI input
•
Bits 7–0—IRQ0–IRQ7
Sense Select (IRQ0S–IRQ7S): These bits set the IRQ0–IRQ7 interrupt
request detection mode.
Bits 7-0: IRQ0S–IRQ7S
Description
0
Interrupt request is detected on low level of IRQ input (initial value)
1
Interrupt request is detected on falling edge of IRQ input
6.3.3
IRQ Status Register (ISR)
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withdrawn by writing a 0 to IRQnF after reading an IRQnF = 1.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.
Bit:
15
14
13
12
11
10
9
8
—
—
—
—
—
—
—
—
Initial value:
0
0
0
0
0
0
0
0
R/W:
R
R
R
R
R
R
R
R
Bit:
7
6
5
4
3
2
1
0
IRQ0F
IRQ1F
IRQ2F
IRQ3F
IRQ4F
IRQ5F
IRQ6F
IRQ7F
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
•
Bits 15–8—Reserved: These bits always read as 0. The write value should always be 0.
Содержание SH7041 Series
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