參數(shù)資料
型號: XC9572
廠商: Xilinx, Inc.
英文描述: In-System Programmable CPLD(在系統(tǒng)復(fù)雜可編程邏輯器件)
中文描述: 在系統(tǒng)可編程的CPLD(在系統(tǒng)復(fù)雜可編程邏輯器件)
文件頁數(shù): 3/6頁
文件大小: 41K
代理商: XC9572
XAPP070 July, 1997 (Version 1.1)
1-11
1
Figure 2: Single Port Serial Boundary-Scan Chain
Figure 3: Star Configuration
Star Configuration
The single port serial chain, shown in
Figure 3
, configura-
tion has a significant limitation due to the possibility that a
defect in the backplane wiring or the removal of a board
from the system will break the chain. This would make ISP
and system testing impossible. In order to overcome this
limitation and make the 1149.1 standard practical for very
large systems, the standard allows the connection of
boundary-scan chains in star configuration in which the
four pins of the TAP are multiplexed. The costs of this
approach are the additional overhead required to switch
between scan paths, and the reduced TCK frequency due
to TMS routing delays.
TDI
TMS
TCK
TDO
Device 1
TDI
TMS
TCK
TDO
Device 2
TDI
TMS
TCK
TDO
Device N
TDI
TMS
TCK
TDO
S
TDI
TMS
TCK
TDO
Device 1
TDI
TMS
TCK
TDO
Device 2
TDI
TMS
TCK
TDO
Device N
TDI
TMS
TCK
TDO
Device 1
TDI
TMS
TCK
TDO
Device 2
TDI
TMS
TCK
TDO
Device N
MUX
DE-MUX
TDI
TMS
TCK
TDO
Select
S
Path 1
Path 2
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
XC9572-10PC44 制造商:XILINX 制造商全稱:XILINX 功能描述:XC9572 In-System Programmable CPLD
XC957210PC44C 制造商:Xilinx 功能描述:
XC9572-10PC44C 功能描述:IC CPLD 72 MCELL C-TEMP 44-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - CPLD(復(fù)雜可編程邏輯器件) 系列:XC9500 標(biāo)準(zhǔn)包裝:24 系列:CoolRunner II 可編程類型:系統(tǒng)內(nèi)可編程 最大延遲時間 tpd(1):7.1ns 電壓電源 - 內(nèi)部:1.7 V ~ 1.9 V 邏輯元件/邏輯塊數(shù)目:24 宏單元數(shù):384 門數(shù):9000 輸入/輸出數(shù):173 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:208-BFQFP 供應(yīng)商設(shè)備封裝:208-PQFP(28x28) 包裝:托盤
XC9572-10PC44C0166 制造商:Xilinx 功能描述:
XC9572-10PC44I 功能描述:IC CPLD 72 MCELL I-TEMP 44-PLCC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - CPLD(復(fù)雜可編程邏輯器件) 系列:XC9500 標(biāo)準(zhǔn)包裝:24 系列:CoolRunner II 可編程類型:系統(tǒng)內(nèi)可編程 最大延遲時間 tpd(1):7.1ns 電壓電源 - 內(nèi)部:1.7 V ~ 1.9 V 邏輯元件/邏輯塊數(shù)目:24 宏單元數(shù):384 門數(shù):9000 輸入/輸出數(shù):173 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:208-BFQFP 供應(yīng)商設(shè)備封裝:208-PQFP(28x28) 包裝:托盤