參數(shù)資料
型號(hào)： LM84CIMQAX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類(lèi)： 溫度/濕度傳感器
英文描述： Diode Input Digital Temperature Sensor with Two-Wire Interface
中文描述： DIGITAL TEMP SENSOR-SERIAL, 8BIT(s), 5Cel, RECTANGULAR, SURFACE MOUNT
封裝： QSOP-16
文件頁(yè)數(shù)： 11/16頁(yè)
文件大?。?/td> 168K
代理商： LM84CIMQAX
1.0 Functional Description
(Continued)
1.7 COMMUNICATING with the LM84
There are 10 data registers in the LM84, selected by the
Command Register. At power-up the Command Register is
set to “00”, the location for the Read Local Temperature
Register. The Command Register latches whatever the last
location it was set to. Reading the Status Register resets
T_CRIT_A. All registers are predefined as read only or write
only. Read and write registers with the same function contain
mirrored data.
A
Write
to the LM84 will always include the address byte and
the command byte. A write to any register requires one data
byte.
Reading
the LM84 can take place either of two ways:
1.
If the location latched in the Command Register is cor-
rect (most of the time it is expected that the Command
Register will point to one of the Read Temperature Reg-
isters because that will be the data most frequently read
from the LM84), the read can simply consist of an ad-
dress byte, followed by retrieving the data byte.
2.
If the Command Register needs to be set, then an
address byte, command byte, repeat start, and another
address byte will accomplish a read.
The data byte has the most significant bit first. At the end of
a read, the LM84 can accept either Acknowledge or No
Acknowledge from the Master (No Acknowledge is typically
used as a signal for the slave that the Master has read its
last byte).
1.7.1 SMBus TIMEOUT
The LM84 SMBus interface circuitry will be reset to the
SMBus idle state if the SMBData or SMBCLK lines are held
low for more than 40 ms. The LM84 may or may not reset the
state SMBData or SMBCLK if either of these lines are held
low between 25 ms and 40 ms. Holding SMBData or SMB-
CLK low for less than or equal to 25 ms will not reset the
interface circuitry. The LM84 has a built-in internal timer to
guarantee that the interface is reset if the SMBData line were
to get stuck low. This can commonly occur when the master
is reset while the slave is transmitting low. This enhance-
ment to the SMBus TIMEOUT specification ensures error
free performance even in remote systems where complete
power supply shutdown, for reset, is a nuisance. This would
have to occur since many cost effective temperature sensors
such as the LM84 do not have a pin dedicated for reset.
DS100961-9
L
www.national.com
11
相關(guān)PDF資料
PDF描述
LM84 Diode Input Digital Temperature Sensor with Two-Wire Interface
LM84CIMQA Diode Input Digital Temperature Sensor with Two-Wire Interface
LM9011 Electronic Ignition Interface
LM9011M Multipole Connector; Gender:Male; Number of Contacts:9; Series:1625P; Body Material:PA Polyamide (Nylon) 6/6; Connecting Termination:Crimp; Number of Rows:3; Operating Voltage:250V; Pitch Spacing:1.57mm
LM9022 Vacuum Fluorescent Display Filament Driver
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM84EVAL 功能描述:EVALUATION BOARD FOR LM84 RoHS:是 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估板 - 傳感器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:1 系列:-
LM84MQA WAF 制造商:Texas Instruments 功能描述:
LM85 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Hardware Monitor with Integrated Fan Control
LM8500 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:Four Wire Resistive Touchscreen Controller with Brownout
LM8500HLQ9 功能描述:IC TOUCHSCREEN CONTROLLER 44LLP RoHS:否 類(lèi)別:集成電路 (IC) >> 數(shù)據(jù)采集 - 觸摸屏控制器 系列:- 標(biāo)準(zhǔn)包裝:96 系列:- 類(lèi)型:- 觸摸面板接口:- 輸入數(shù)/鍵:- 分辨率（位）:- 評(píng)估套件:* 數(shù)據(jù)接口:- 數(shù)據(jù)速率/采樣率 (SPS，BPS):- 電壓基準(zhǔn):- 電源電壓:- 電流 - 電源:- 工作溫度:- 安裝類(lèi)型:表面貼裝 封裝/外殼:16-TSSOP（0.173"，4.40mm 寬） 供應(yīng)商設(shè)備封裝:16-TSSOP 包裝:帶卷 (TR)
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*