Motorola ATCA-717 用户手册
Maps and Registers
PCI Devices
136
PENT/ATCA−717
PCI Devices
The following figure shows the on−board PCI device structure.
aaa
PMC#1
PMC#2
PMC#3
PMC#4
ETH#2
ETH#0/1
PCI I/O Bridge
South Bridge
PCI
PCI
PCI
PCI
PCI
PCI
PCI
PCI
Bus #5
Bus #4
Dev. No. = 3
Dev. No. = 1
Dev. No. = 2
Dev. No. = 4
Dev. No. = 4
Dev. No. = 4
Bus #2
Bus #1
Dev. No. = 31
Dev. No. = 29
Dev. No. = 30
Dev. No. = 28
Host Bridge
PCI
PCI
Bus #3
Bus #0
Dev. No. = 2
ETH#0/1
Intel
82540EM
Intel
82546EB/GB
Figure 41:
PCI Structure
The following table lists the PCI devices interrupt signals which are routed to the South
Bridge. BIOS allows to map these signals to standard ISA interrupts.
Bridge. BIOS allows to map these signals to standard ISA interrupts.
aaa
Table 17:
PCI Device Interrupts
PCI Device
PCI IRQ
Device
No.
No.
IDSEL
PCI Bus
PMC 1
PIRQA_N|PIRQB_N|PIRQC_N|PIRQD_N
3
19
5
PMC 2
PIRQA_N|PIRQB_N|PIRQC_N|PIRQD_N
1
17
5
PMC 3
PIRQA_N|PIRQB_N|PIRQC_N|PIRQD_N
2
18
4
PMC 4
PIRQA_N|PIRQB_N|PIRQC_N|PIRQD_N
4
20
4
ETH 2
PIRQC_N
4
20
2
ETH 0|1
PIRQA_N|PIRQB_N
4
20
1