Interrupt Mode (Intmod) Register - Samsung S3C2416 User Manual

INTERRUPT CONTROLLER

2.2 INTERRUPT MODE (INTMOD) REGISTER

This register is composed of 32 bits each of which is related to an interrupt source. If a specific bit is set to 1, the
corresponding interrupt is processed in the FIQ (fast interrupt) mode. Otherwise, it is processed in the IRQ mode
(normal interrupt).
Note that only one interrupt source can be serviced in the FIQ mode in the interrupt controller (you should use the
FIQ mode only for the urgent interrupt). Thus, only one bit of INTMOD can be set to 1.
Register Address
INTMOD 1 0X4A000004
INTMOD 2 0X4A000044
NOTE: If an interrupt mode is set to FIQ mode in the INTMOD register, FIQ interrupt will not affect both INTPND and
INTOFFSET registers. In this case, the two registers are valid only for IRQ mode interrupt source.
INTMOD1
INT_ADC
INT_RTC
Reserved
INT_UART0
INT_IIC0
INT_USBH
INT_USBD
INT_NAND
INT_UART1
INT_SPI0
INT_SDI0
INT_SDI1
Reserved
INT_UART3
INT_DMA
INT_LCD
INT_UART2
INT_TIMER4
INT_TIMER3
INT_TIMER2
INT_TIMER1
INT_TIMER0
10-12
R/W
R/W Interrupt mode regiseter for group 1.
0 = IRQ mode
1 = FIQ mode
R/W Interrupt mode regiseter for group 2.
0 = IRQ mode
1 = FIQ mode
Bit
[31] 0 = IRQ,
[30] 0 = IRQ,
[29] 0 = IRQ,
[28] 0 = IRQ,
[27] 0 = IRQ,
[26] 0 = IRQ,
[25] 0 = IRQ,
[24] 0 = IRQ,
[23] 0 = IRQ,
[22] 0 = IRQ,
[21] 0 = IRQ,
[20] 0 = IRQ,
[19] 0 = IRQ,
[18] 0 = IRQ,
[17] 0 = IRQ,
[16] 0 = IRQ,
[15] 0 = IRQ,
[14] 0 = IRQ,
[13] 0 = IRQ,
[12] 0 = IRQ,
[11] 0 = IRQ,
[10] 0 = IRQ,
S3C2416X RISC MICROPROCESSOR
Description
Description
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
1 = FIQ
Reset Value
0x00000000
0x00000000
Initial State
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0