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MPC8280 데이터시트(PDF) 376 Page - Freescale Semiconductor, Inc

부품명 MPC8280
상세설명  PowerQUICC??II Family Reference Manual
PDF  1386 Pages
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제조업체  FREESCALE [Freescale Semiconductor, Inc]
홈페이지  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC8280 데이터시트(HTML) 376 Page - Freescale Semiconductor, Inc

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PCI Bridge
MPC8280 PowerQUICC II Family Reference Manual, Rev. 1
9-68
Freescale Semiconductor
Figure 9-61. Outbound Message Registers (OMR
x)
9.12.2
Door Bell Registers
The PCI bridge contains an inbound and an outbound door bell register. The registers are 32-bit. The
inbound door bell allows a remote processor to set a bit in the register from the PCI bus. This, in turn,
causes the PCI bridge to generate an interrupt to the local processor. The local processor can write to the
outbound register which causes the outbound interrupt signal INTA to assert thus interrupting the remote
processor on the PCI bus.
9.12.2.1
Outbound Doorbell Register (ODR)
ODR, described in Figure 9-62 and Table 9-48, is accessible from the PCI bus and the 60x bus in both host
and agent modes.
31
16
Field
OMSG
x
Reset
Undefined
R/W
R/W
Addr
0x1045A (OMR0); 0x1045E (OMR1)
15
0
Field
OMSG
x
Reset
Undefined
R/W
R/W
Addr
0x10458 (OMR0); 0x1045C (OMR1)
Table 9-47. OMR
x Field Descriptions
Bits
Name
Description
31–0
OMSG
x
Outbound message
x. Contains generic data to be passed between the local
processor and external hosts.



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