Organization of the Board
MEN Mikro Elektronik GmbH
116
20A014-00 E2 – 2007-08-16
5.2
Interrupt Handling
Interrupt handling between the FPGA and the CPU is done via the 12 external
interrupt lines of the CPU (EXT_INT[0..11]). While the IRQ lines 7 to 11 are used
as the four PCI interrupt lines (see
Table 58, Interrupt Numbering assigned by
MENMON, on page 116
), each FPGA unit interrupt is routed to a dedicated
interrupt line. The mapping is as follows:
Table 57.
Dedicated interrupt line assignment
Table 58.
Interrupt Numbering assigned by MENMON
5.3
SMB Devices
Table 59.
SMB devices
MPC8540 External Interrupt Line
FPGA Function
EXT_IRQ0
System unit
EXT_IRQ1
IDE
EXT_IRQ2
GPIO (5 units)
EXT_IRQ3
UART
EXT_IRQ4
NAND Flash IDE
MPC8540 IRQ Input
PCI Interrupt Line
Assigned Number
(MENMON)
IRQ8
INTA
0xF0
IRQ9
INTB
0xF1
IRQ10
INTC
0xF2
IRQ11
INTD
0xF3
Address
Function
0x5E
LM81 hardware monitor
0xA0
SPD of SO-DIMM
0xA8 / 0xAA
CPU plug-on module EEPROM (512 bytes)
0xAC / 0xAE
Carrier board EEPROM (512 bytes)
0xD0
RTC RA8185