參數(shù)資料
型號(hào): MIC184
廠商: Micrel Semiconductor,Inc.
英文描述: Local/Remote Thermal Supervisor Advance Information
中文描述: 本地/遠(yuǎn)程熱監(jiān)進(jìn)展信息
文件頁(yè)數(shù): 6/21頁(yè)
文件大?。?/td> 140K
代理商: MIC184
MIC184
Functional Diagram
Micrel
MIC184
6
November 2000
Functional Description
Pin Descriptions
VDD
Power supply input. See electrical specifications.
GND
Ground return for all MIC184 functions.
CLK
Clock input to the MIC184 from the two-wire serial bus. The
clock signal is provided by the bus host and is shared by all
devices on the bus.
DATA
Serial data I/O pin that connects to the two-wire serial bus.
DATA is bidirectional and has an open-drain output driver. An
external pull-up resistor or current source somewhere in the
system is necessary on this line. This line is shared by all
devices on the bus.
A2/T1, A1, A0
These inputs set the three least significant bits of the MIC184
s
7-bit slave address. Each MIC184 will only respond to its own
unique slave address, allowing the use of up to eight MIC184s
on a single bus. A match between the MIC184
s address and
2:1
MUX
TEMPERATURCONVERTER
1-Bit
DAC
A2/T1
A1
A0
DATA
MIC184
CLK
INT
2-Wire
Serial Bus
Interface
Pointer
Register
Temperature
Hysteresis
Register
State
Machine
and
Digital
Comparator
Digital Filter
and
Control
Logic
Thermostat
Output
Configuration
Register
Bandgap
Sensor
and
Reference
Result
Register
Temperature
Setpoint
Register
the address specified in the serial bit stream must be made
to initiate communication. A1 and A0 should be connected
directly to V
DD
or ground. When A2/T1 is used as an address
bit input, it should also be tied to V
DD
or ground. A2/T1 can
alternatively connect to a remote temperature sensor. When
A2/T1 is used for temperature measurements, an off-chip
diode junction must be connected between A2/T1 and ground.
In this case, internal circuitry will detect A2 as logic low,
leaving four possible slave addresses. See
Temperature
Measurement
and
Power On
for more information. A2/T1,
A1, and A0 determine the slave address as shown in Table 1.
INT
Temperature events are indicated to external circuitry via this
output. INT may be configured as active-low or active-high by
the host. Operation of the INT output is controlled by the
MODE and POL bits in the MIC184
s configuration register.
See
Comparator and Interrupt Modes
below. This output is
open-drain and may be wire-ORed with other open-drain
signals. Most systems will require a pull-up resistor or current
source on this pin. If the IM bit in the configuration register is
set, it prevents the INT output from sinking current. In I
2
C and
SMBus systems, the IM bit is therefore an interrupt mask bit.
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