TM Family Datasheet Page 49 of 79 June 2009 – " />
參數(shù)資料
型號： PI7C9X20404GPBNBE
廠商： Pericom
文件頁數(shù)： 44/79頁
文件大?。?/td> 0K
描述： IC PCIE PACKET SWITCH 148LFBGA
產(chǎn)品變化通告： Product Discontinuation Notice 22/Jan/2010
標準包裝： 189
系列： GreenPacket™
應用： 封裝開關(guān)，4 端口/4 線道
接口： PCI Express
封裝/外殼： 148-LFBGA
供應商設備封裝： 148-LFBGA（12x12）
包裝： 托盤
安裝類型： 表面貼裝
PI7C9X20404GP
4Port-4Lane PCI Express Switch
GreenPacket
TM Family
Datasheet
Page 49 of 79
June 2009 – Revision 1.6
Pericom Semiconductor
7.2.63
NEXT ITEM POINTER REGISTER – OFFSET E0h
BIT
FUNCTION
TYPE
DESCRIPTION
15:8
Next Item Pointer
RO
Read as 00h. No other ECP registers.
7.2.64
PCI EXPRESS CAPABILITIES REGISTER – OFFSET E0h
BIT
FUNCTION
TYPE
DESCRIPTION
19:16
Capability Version
RO
Read as 0001b to indicate the device is compliant to Revision 1.0a of PCI
Express Base Specifications.
23:20
Device/Port Type
RO
Indicates the type of PCI Express logical device.
Reset to 0101b (Upstream port).
Reset to 0110b (Downstream port).
24
Slot Implemented
HwInt
When set, indicates that the PCIe Link associated with this Port is connected
to a slot. This field is valid for downstream port of the switch. The default
value may be changed by the status of strapped pin, SMBus, or auto-loading
from EEPROM.
29:25
Interrupt Message
Number
RO
Read as 0b. No MSI messages are generated in the transparent mode.
31:30
Reserved
RO
Reset to 00b.
7.2.65
DEVICE CAPABILITIES REGISTER – OFFSET E4h
BIT
FUNCTION
TYPE
DESCRIPTION
2:0
Max_Payload_Size
Supported
RO
Indicates the maximum payload size that the device can support for TLPs.
Each port of the Switch supports 256 bytes max payload size. The default
value may be changed by SMBus or auto-loading from EEPROM.
Reset to 001b.
4:3
Phantom Functions
Supported
RO
Indicates the support for use of unclaimed function numbers as Phantom
functions. Read as 00b, since the Switch does not act as a requester.
Reset to 00b.
5
Extended Tag Field
Supported
RO
Indicates the maximum supported size of Tag field as a Requester. Read as 0,
since the Switch does not act as a requester.
Reset to 0b.
8:6
Endpoint L0s
Acceptable Latency
RO
Acceptable total latency that an Endpoint can withstand due to the transition
from L0s state to the L0 state. For Switch, the ASPM software would not
check this value.
Reset to 000b.
11:9
Endpoint L1
Acceptable Latency
RO
Acceptable total latency that an Endpoint can withstand due to the transition
from L1 state to the L0 state. For Switch, the ASPM software would not
check this value.
Reset to 000b.
14:12
Reserved
RO
Reset to 000b.
15
Role_Based Error
Reporting
RO
When set, indicates that the device implements the functionality originally
defined in the Error Reporting ECN. The default value may be changed by
SMBus or auto-loading from EEPROM.
Reset to 1b.
17:16
Reserved
RO
Reset to 00b.
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