- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373995 > ADM1026JST-REEL (ANALOG DEVICES INC) Complete Thermal and System Management Controller PDF資料下載
參數(shù)資料
| 型號： | ADM1026JST-REEL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 電源管理 |
| 英文描述： | Complete Thermal and System Management Controller |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PQFP48 |
| 封裝： | 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, MS-026BBC, LQFP-48 |
| 文件頁數(shù)： | 12/56頁 |
| 文件大?。?/td> | 634K |
| 代理商： | ADM1026JST-REEL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁當(dāng)前第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁
ADM1026
Serial Bus Interface
Control of the ADM1026 is carried out via the serial system
management bus (SMBus). The ADM1026 is connected to this
bus as a slave device, under the control of a master device.
Rev. A | Page 12 of 56
The ADM1026 has a 7-bit serial bus slave address. When the
device is powered on, it does so with a default serial bus address.
The 5 MSBs of the address are set to 01011, and the 2 LSBs are
determined by the logical states of Pin 15 ADD/NTESTOUT.
This pin is a three-state input that can be grounded, connected
to V
CC
, or left open-circuit to give three different addresses.
Table 5. Address Pin Truth Table
ADD Pin
GND
No Connect
V
CC
A1
0
1
0
A0
0
0
1
If ADD is left open-circuit, the default address is 0101110
(5Ch). ADD is sampled only at power-up on the first valid
SMBus transaction, so any changes made while the power is on
(and the address is locked) have no effect.
The facility to make hardwired changes to device addresses
allows the user to avoid conflicts with other devices sharing the
same serial bus, for example if more than one ADM1026 is used
in a system.
General SMBus Timing
Figure 17 and Figure 18 show timing diagrams for general read
and write operations using the SMBus. The SMBus specification
defines specific conditions for different types of read and write
operations, which are discussed later in this section.
The general SMBus protocol
1
operates as follows:
1.
The master initiates data transfer by establishing a start
condition, defined as a high-to-low transition on the serial
data line (SDA) while the serial clock line SCL remains
high. This indicates that a data stream follows. All slave
peripherals connected to the serial bus respond to the start
condition and shift in the next 8 bits, consisting of a 7-bit
slave address (MSB first) and an R/W bit, which determine
the direction of the data transfer, that is, whether data is
written to or read from the slave device
(0 = write, 1 = read).
The peripheral whose address corresponds to the trans-
mitted address responds by pulling the data line low during
the low period before the ninth clock pulse, known as the
acknowledge bit, and holding it low during the high period
of this clock pulse. All other devices on the bus remain idle
while the selected device waits for data to be read from or
written to it. If the R/W bit is 0, the master writes to the
slave device. If the R/W bit is 1, the master reads from the
slave device.
2.
Data is sent over the serial bus in sequences of nine clock
pulses, 8 bits of data followed by an acknowledge bit from
the slave device. Data transitions on the data line must
occur during the low period of the clock signal and re-
main stable during the high period, because a low-to-high
transition when the clock is high may be interpreted as
a stop signal.
If the operation is a write operation, the first data byte after
the slave address is a command byte. This tells the slave
device what to expect next. It may be an instruction telling
the slave device to expect a block write, or it may simply be
a register address that tells the slave where subsequent data
is to be written.
Because data can flow in only one direction as defined by
the R/W bit, it is not possible to send a command to a slave
device during a read operation. Before doing a read oper-
ation, it may first be necessary to do a write operation to
tell the slave what type of read operation to expect and/or
the address from which data is to be read.
3.
When all data bytes have been read or written, stop
conditions are established. In write mode, the master pulls
the data line high during the 10th clock pulse to assert a
stop condition. In read mode, the master
device releases the SDA line during the low period before
the ninth clock pulse, but the slave device does not pull
it low (called No Acknowledge). The master takes the data
line low during the low period before the 10th clock pulse,
then high during the 10th clock pulse to assert a stop
condition.
1
If it is required to perform several read or write operations in succession, the
master can send a repeat start condition instead of a stop condition to begin
a new operation.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADM1026JSTZ-REEL | Complete Thermal and System Management Controller |
| ADM1026JST | Circular Connector; No. of Contacts:28; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:19-28 |
| ADM1030ARQ | Intelligent Temperature Monitor and PWM Fan Controller |
| ADM1030 | Circular Connector; No. of Contacts:66; Series:LJT06R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:19-35 |
| ADM1033 | Thermal Monitor and Fan Speed (RPM) Controller |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADM1026JST-REEL7 | 功能描述:IC CNTRL SYS REF/EEPROM 48LQFP RoHS:否 類別:集成電路 (IC) >> PMIC - 熱管理 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 功能:溫度監(jiān)控系統(tǒng)（傳感器） 傳感器類型:內(nèi)部和外部 感應(yīng)溫度:-40°C ~ 125°C，外部傳感器 精確度:±2.5°C 本地（最大值），±5°C 遠程（最大值） 拓?fù)?ADC，比較器，寄存器庫 輸出類型:2 線 SMBus? 輸出警報:無 輸出風(fēng)扇:無 電源電壓:2.7 V ~ 5.5 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-8 供應(yīng)商設(shè)備封裝:SOT-23-8 包裝:Digi-Reel® 其它名稱:296-22675-6 |
| ADM1026JSTZ | 功能描述:PMIC 解決方案 HI INT SYS MONITR IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| ADM1026JSTZ-R7 | 功能描述:PMIC 解決方案 HI INT SYS MONITR IC RoHS:否 制造商:Texas Instruments 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:QFN-24 封裝:Reel |
| ADM1026JSTZ-REEL | 功能描述:板上安裝溫度傳感器 HI INT SYS MONITR IC RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準(zhǔn)確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風(fēng)格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| ADM1026JSTZ-REEL7 | 制造商:Analog Devices 功能描述:IC SYSTEM MONITOR 制造商:ON Semiconductor 功能描述:IC SYSTEM MONITOR |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。