TM Family Datasheet Page 54 of 77 July 2009 – Rev" />
參數(shù)資料
型號(hào): PI7C9X20404SLCFDE
廠商: Pericom
文件頁(yè)數(shù): 50/77頁(yè)
文件大?。?/td> 0K
描述: IC PCIE PACKET SWITCH 128LQFP
標(biāo)準(zhǔn)包裝: 90
系列: SlimLine™
應(yīng)用: 封裝開(kāi)關(guān),4 端口/4 線道
接口: PCI Express
封裝/外殼: 128-LQFP 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝: 128-LQFP(14x14)
包裝: 托盤(pán)
安裝類(lèi)型: 表面貼裝
PI7C9X20404SL
4Port-4Lane PCI Express Switch
SlimLine
TM Family
Datasheet
Page 54 of 77
July 2009 – Revision 1.2
Pericom Semiconductor
BIT
FUNCTION
TYPE
DESCRIPTION
20
Data Link Layer
Active Reporting
Capable
RO
For a Downstream Port, this bit must be set to 1b if the component supports
the optional capability of reporting the DL_Active state of the Data Link
Control and Management State Machine. For a hot-plug capable Downstream
Port, this bit must be set to 1b.
For Upstream Port, this bit must be hardwired to 0b.
Reset to 0b for upstream port.
Reset to 1b for downstream ports.
23:21
Reserved
R0
Reset to 000b
31:24
Port Number
RO
Indicates the PCIe Port Number for the given PCIe Link. The default value
may be changed by SMBus or auto-loading from EEPROM.
Reset to 00h for Port 0.
Reset to 01h for Port 1.
Reset to 02h for Port 2.
Reset to 03h for Port 3.
7.2.71
LINK CONTROL REGISTER – OFFSET F0h
BIT
FUNCTION
TYPE
DESCRIPTION
1:0
Active State Power
Management
(ASPM) Control
RW
00b: ASPM is Disabled
01b: L0s Entry Enabled
10b: L1 Entry Enabled
11b: L0s and L1 Entry Enabled
Note that the receiver must be capable of entering L0s even when the field is
disabled.
Reset to 00b.
2
Reserved
RO
Reset to 0b.
3
Read Completion
Boundary (RCB)
RO
Does not apply to PCI Express Switch. Returns ‘0’ when read.
Reset to 0b.
4
Link Disable
RW
At upstream port, it is not allowed to disable the link, so this bit is hardwired
to ‘0’. For downstream ports, it disables the link when this bit is set.
Reset to 0b.
5
Retrain Link
RW
At upstream port, it is not allowed to retrain the link, so this bit is hardwired
to 0b. For downstream ports, it initiates Link Retraining when this bit is set.
This bit always returns 0b when read.
6
Common Clock
Configuration
RW
0b: The components at both ends of a link are operating with asynchronous
reference clock
1b: The components at both ends of a link are operating with a distributed
common reference clock
Reset to 0b.
7
Extended Synch
RW
When set, it transmits 4096 FTS ordered sets in the L0s state for entering L0
state and transmits 1024 TS1 ordered sets in the L1 state for entering L0 state.
Reset to 0b.
15:8
Reserved
RO
Reset to 00h.
7.2.72
LINK STATUS REGISTER – OFFSET F0h
BIT
FUNCTION
TYPE
DESCRIPTION
19:16
Link Speed
RO
Read as 0001b to indicate the negotiated speed of the Express link is 2.5
Gb/s.
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