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參數(shù)資料
| 型號： | SCAN18541T |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | Non-Inverting Line Driver with TRI-STATE Outputs(帶三態(tài)輸出的同相線驅(qū)動器) |
| 中文描述： | 非反相線驅(qū)動器與三態(tài)輸出（帶三態(tài)輸出的同相線驅(qū)動器） |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 151K |
| 代理商： | SCAN18541T |
Description of Boundary-Scan Circuitry
The scan cells used in the BOUNDARY-SCAN register are
one of the following two types depending upon their location.
Scan cell TYPE1 is intended to solely observe system data,
while TYPE2 has the additional ability to control system
data. (See IEEE Standard 1149.1 Figure10–11 for a further
description of scan cell TYPE1 and Figure 10–12 for a fur-
ther description of scan cell TYPE2.)
Scan cell TYPE1 is located on each system input pin while
scan cell TYPE2 is located at each system output pin as well
as at each of the two internal active-high output enable sig-
nals. AOE controls the activity of the A-outputs while BOE
controls the activity of the B-outputs. Each will activate their
respective outputs by loading a logic high.
The BYPASS register is a single bit shift register stage iden-
tical to scan cell TYPE1. It captures a fixed logic low.
The INSTRUCTION register is an 8-bit register which cap-
tures the default value of 10000001. The two least significant
bits of this captured value (01) are required by IEEE Std
1149.1. The upper six bits are unique to the SCAN18541T
device. SCAN CMOS Test Access Logic devices do not in-
clude the IEEE 1149.1 optional identification register. There-
fore, this unique captured value can be used as a “pseudo
ID” code to confirm that the correct device is placed in the
appropriate location in the boundary scan chain.
MSB
→
LSB
Instruction Code
00000000
10000001
10000010
00000011
All Others
Instruction
EXTEST
SAMPLE/PRELOAD
CLAMP
HIGH-Z
BYPASS
Bypass Register Scan Chain Definition
Logic 0
DS100324-9
Instruction Register Scan Chain Definition
DS100324-10
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SCAN18541T/MXA | 制造商:Rochester Electronics LLC 功能描述: |
| SCAN18541TFMQB | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:SERIALLY CONTROLLED ACCESS NETWORK NON-INVERTING LINE DRIVER WITH TRI-STATE OUTPUTS |
| SCAN18541TFMQB WAF | 制造商:Texas Instruments 功能描述: |
| SCAN18541TSSC | 功能描述:緩沖器和線路驅(qū)動器 Non-Inv Line Drv RoHS:否 制造商:Micrel 輸入線路數(shù)量:1 輸出線路數(shù)量:2 極性:Non-Inverting 電源電壓-最大:+/- 5.5 V 電源電壓-最小:+/- 2.37 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Reel |
| SCAN18541TSSC-G | 制造商:Rochester Electronics LLC 功能描述: |
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