MIC384 Micrel Semiconductor, MIC384 Datasheet - Page 6

• Manufacturer Part Number: MIC384
• Description: Three-Zone Thermal Supervisor Advance Information
• Manufacturer: Micrel Semiconductor

MIC384
Functional Diagram
Functional Description
Pin Descriptions
VDD: Power supply input. See electrical specifications.
GND: Ground return for all MIC384 functions.
CLK: Clock input to the MIC384 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 MIC384’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 MIC384 will only respond
to its own unique slave address, allowing up to eight MIC384’s
to share a single bus. A match between the MIC384’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
MIC384
DATA
CLK
T1
T2
A0
MIC384
Reference
Serial Bus
Bandgap
Interface
Register
Sensor
Pointer
2-Wire
MUX
and
3:1
1-Bit
DAC
Configuration
Temperature
Temperature
Hysteresis
Registers
Registers
Registers
Register
Setpoint
Result
GND
VDD
6
and Power On" for more information. A0 determines the slave
address as shown in Table 1:
/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 MIC384’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
P
a
M
M
M
M
t r
C I
C I
C I
C I
N
3
3
3
3
u
8
8
8
8
Table 1. MIC384 Slave Address Settings
m
4
4
4
4
0 -
2 -
3 -
1 -
b
r e
Open-Drain
Output
8-Bit Sigma-Delta ADC
Digital Filter
Comparator
Machine
Control
Digital
n I
Logic
State
and
and
A
p
0
0
0
0
1
1
1
1
u
0
s t
/INT
1
1
1
1
1
1
1
1
M
0
0
0
0
0
0
0
0
B
0
0
0
0
0
0
0
0
C I
n i
1
1
1
1
1
1
1
1
3
a
0
0
0
0
1
1
1
1
8
y r
0
0
1
1
0
0
1
1
4
0
1
0
1
0
1
0
1
b
b
b
b
b
b
b
b
S
a l
v
September 2000
e
A
d
d
e r
H
4
4
4
4
4
4
4
4
s
C
D
e
A
B
E
F
8
9
s
x
h
h
h
h
h
h
h
h
Micrel