ADM1030
http://onsemi.com
7
General Description
The ADM1030 is a temperature monitor and PWM fan
controller for microprocessor-based systems. The device
communicates with the system via a serial System
Management Bus. The serial bus controller has a hardwired
address pin for device selection (Pin 13), a serial data line for
reading and writing addresses and data (Pin 15), and an
input line for the serial clock (Pin 16). All control and
programming functions of the ADM1030 are performed
over the serial bus. The device also supports the SMBus
Alert Response Address (ARA) function.
Internal Registers of the ADM1030
A brief description of the ADM1030s principal internal
registers is given below. More detailed information on the
function of each register is given in Table 16 to Table 30.
Configuration Register
Provides control and configuration of various functions
on the device.
Address Pointer Register
This register contains the address that selects one of the
other internal registers. When writing to the ADM1030, the
first byte of data is always a register address, which is written
to the Address Pointer Register.
Status Registers
These registers provide status of each limit comparison.
Value and Limit Registers
The results of temperature and fan speed measurements
are stored in these registers, along with their limit values.
Fan Speed Config Register
This register is used to program the PWM duty cycle for
the fan.
Offset Registers
Allows the temperature channel readings to be offset by
a 5-bit twos complement value written to these registers.
These values will automatically be added to the temperature
values (or subtracted from if negative). This allows the
systems designer to optimize the system if required, by
adding or subtracting up to 15癈 from a temperature
reading.
Fan Characteristics Register
This register is used to select the spin-up time, PWM
frequency, and speed range for the fan used.
THERM Limit Registers
These registers contain the temperature values at which
THERM
will be asserted.
T
MIN
/T
RANGE
Registers
These registers are read/write registers that hold the
minimum temperature value below which the fan will not
run when the device is in Automatic Fan Speed Control
Mode. These registers also hold the values defining the
range over that auto fan control will be provided, and hence
determines the temperature at which the fan will run at full
speed.
Serial Bus Interface
Control of the ADM1030 is carried out via the SMBus.
The ADM1030 is connected to this bus as a slave device,
under the control of a master device, e.g., the 810 chipset.
The ADM1030 has a 7-bit serial bus address. When the
device is powered up, it will do so with a default serial bus
address. The five MSBs of the address are set to 01011, the
two LSBs are determined by the logical state of Pin 13
(ADD). This is a three-state input that can be grounded,
connected to V
CC
, or left open-circuit to give three different
addresses. The state of the ADD pin is only sampled at
power-up, so changing ADD with power on will have no
effect until the device is powered off, then on again.
Table 5. ADD PIN TRUTH TABLE
ADD Pin
A1
A0
GND
0
0
No Connect
1
0
V
CC
0
1
If ADD is left open-circuit, the default address will be
0101110.
The facility to make hardwired changes at the ADD pin
allows the user to avoid conflicts with other devices sharing
the same serial bus, for example, if more than one ADM1030
is used in a system.
The serial bus protocol 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 an address/data stream will follow. 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 address (MSB first) plus an
R/W
bit that determines the direction of the data
transfer, i.e., whether data will be written to or
read from the slave device.
The peripheral whose address corresponds to the
transmitted address responds by pulling the data
line low during the low period before the ninth
clock pulse, known as the Acknowledge Bit. All
other devices on the bus now remain idle while the
selected device waits for data to be read from or
written to it. If the R/W
bit is a 0, the master will
write to the slave device. If the R/W
bit is a 1, the
master will read from the slave device.
2. Data is sent over the serial bus in sequences of
nine clock pulses, eight bits of data followed by an
Acknowledge Bit from the slave device.
Transitions on the data line must occur during the
low period of the clock signal and remain stable
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
ADM1032ARZ-REEL
IC TEMP MONITOR 85DEG 8SOIC
ADM1033ARQZ-RL7
IC THERM/FAN SPEED CTLR 16-QSOP
ADM1034ARQZ-REEL
IC THERM/FAN SPEED CTRLR 16-QSOP
ADN8810ACPZ-REEL7
IC CURRENT SOURCE(12BIT) 24LFCSP
ADP2140ACPZ3328R7
IC REG DL BCK/LINEAR 10LFCSP
ADP5022ACBZ-6-R7
IC REG TRPL BCK/LINEAR 16WLCSP
ADP5041ACPZ-1-R7
IC REG TRPL BCK/LINEAR 20-LFCSP
ADP5042ACPZ-2-R7
IC REG TRPL BCK/LINEAR 20LFCSP
相关代理商/技术参数
ADM1031
制造商:AD 制造商全称:Analog Devices 功能描述:Intelligent Temperature Monitor and Dual PWM Fan Controller
ADM1031ARQ
功能描述:IC SENSOR 2-TEMP/FAN CTRL 16QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADM1031ARQ-ND
制造商:ON Semiconductor 功能描述:
ADM1031ARQ-REEL
功能描述:IC SENSOR 2-TEMP/FAN CTRL 16QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADM1031ARQ-REEL7
功能描述:IC SENSOR 2-TEMP/FAN CTRL 16QSOP RoHS:否 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADM1031ARQZ
功能描述:马达/运动/点火控制器和驱动器 2 CH TDM PWM FAN CTRL IC RoHS:否 制造商:STMicroelectronics 产品:Stepper Motor Controllers / Drivers 类型:2 Phase Stepper Motor Driver 工作电源电压:8 V to 45 V 电源电流:0.5 mA 工作温度:- 25 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:HTSSOP-28 封装:Tube
ADM1031ARQZ-R7
功能描述:IC SENSOR 2TEMP/FAN CTRL 16QSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 热管理 系列:- 标准包装:1 系列:- 功能:温度监控系统（传感器） 传感器类型:内部和外部 感应温度:-40°C ~ 125°C，外部传感器 精确度:±2.5°C 本地（最大值），±5°C 远程（最大值） 拓扑:ADC，比较器，寄存器库 输出类型:2 线 SMBus? 输出警报:无 输出风扇:无 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 125°C 安装类型:表面贴装 封装/外壳:SOT-23-8 供应商设备封装:SOT-23-8 包装:Digi-Reel® 其它名称:296-22675-6
ADM1031ARQZ-REEL
功能描述:板上安装温度传感器 2 CH TDM PWM FAN CTRL IC RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor