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Functional Description
CPB902
C P B 9 0 2 U s e r M a n u a l
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© 2 0 0 8 F a s t w e l v . 1 . 5 b E
4.2.3
Interrupt settings
By default, interrupts are generated by the devices belonging to the CPB902 module. The interrupt
source multiplexing diagram is presented in Figure 4.4. Table 4.4 contains interrupt settings.
Among the alternative interrupt generating devices are: expansion modules on ISA system bus
(PC/104 connector), optoisolated Reset input, NAND flash memory, and keyboard.
Figure 4.4:
Interrupt Source Multiplexing Diagram
IRQ Selector
SIO_IRQ1 (SIO Key board)
SIO_IRQ4 (SIO Com1)
SIO_IRQ5
PC104_IRQ5
SIO_IRQ6
PC104_IRQ6
PC104_IRQ7
PC104_IRQ9
IRQ MUX
IRQ0 (Timer)
IRQ1
IRQ2 (Cascade)
IRQ4 (COM1)
IRQ3 (Int. Com2)
IRQ5 (LPT2)
IRQ6 (Floppy )
IRQ7 (LPT1)
IRQ8 (RTC)
IRQ9
IRQ10
IRQ11
IRQ12 (Mouse)
IRQ13 (MCo)
IRQ14 (HDD1
Primary )
IRQ15 (
HDD2 Secondary
)
PC104_IRQ11
PC104_IRQ12
SIO_IRQ12 (SIO Mouse)
PC104_IRQ14
PC104_IRQ15
Kbd_IRQ
UART_IRQ
FBUS_IRQ
IRQ_MUX0
IRQ_MUX1
IRQ_MUX2
IRQ_MUX3
PC104_IRQ4
SIO_IRQ8
Opto IRQ
FL_RB