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MIC284-2BMM Datasheet(PDF) 6 Page - Micrel Semiconductor

Part # MIC284-2BMM
Description  Two-Zone Thermal Supervisor Advance Information
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Manufacturer  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

MIC284-2BMM Datasheet(HTML) 6 Page - Micrel Semiconductor

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MIC284
Micrel
MIC284
6
September 29, 2000
FUNCTIONAL DESCRIPTION
Pin Descriptions
VDD: Power supply input. See electrical specifications.
GND: Ground return for all MIC284 functions.
CLK: Clock input to the MIC284 from the two-wire serial bus.
The clock signal is provided by the 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 bi-directional and has an open-drain output
driver. An external pull-up resistor or current source some-
where in the system is necessary on this line. This line is
shared by all devices on the bus.
A0: This inputs sets the least significant bit of the MIC284’s
7-bit slave address. The six most-significant bits are fixed
and are determined by the part number ordered. (See order-
ing information table above.) Each MIC284 will only respond
to its own unique slave address, allowing up to eight MIC284s
to share a single bus.
A match between the MIC284’s
address and the address specified in the serial bit stream
must be made to initiate communication. A0 should be tied
directly to VDD or ground. See "Temperature Measurement
Functional Diagram
2:1
MUX
TEMPERATURE-TO-DIGITAL
CONVERTER
1-Bit
DAC
A0
DATA
VDD
MIC284
CLK
/CRIT
GND
2-Wire
Serial Bus
Interface
Temperature
Hysteresis
Registers
State
Machine
and
Digital
Comparator
Digital Filter
and
Control
Logic
Open-Drain
Output
Configuration
Register
Bandgap
Sensor
and
Reference
Result
Registers
T_SET & /CRIT
Setpoint
Registers
T1
/INT
Pointer
Register
and Power On" for more information. A0 determines the slave
address as shown in Table 1:
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Ay
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0
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4
8
2
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I
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0
0
0
1
0
0
1
b
8
4
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11
0
0
1
0
0
1
b
9
4
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1
-
4
8
2
C
I
M0
0
1
0
1
0
0
1
b
A
4
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11
1
0
1
0
0
1
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B
4
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2
-
4
8
2
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M0
0
0
1
1
0
0
1
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C
4
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11
0
1
1
0
0
1
b
D
4
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3
-
4
8
2
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M0
0
1
1
1
0
0
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E
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4
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Table 1. MIC284 Slave Address Settings
/INT: Temperature events are indicated to external circuitry
via this output. Operation of the /INT output is controlled by
the MODE and IM bits in the MIC284’s configuration register.
See "Comparator and Interrupt Modes" below. This output is
open-drain and may be wire-OR’ed 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


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