MIC284 Evaluation Board

MIC284 Evaluation Board and DemoWare Software
Micrel
MIC284 Evaluation Board
DemoWare™ Software
• 3.3V, 100mA regulated power supply
• Power supply leads or cables
• SMBus™/I2C™ compatible serial bus host for communication with the MIC284
• Cable for serial host connection, as appropriate
In either case, the following additional items are useful, but
not required:
• Logic probe(s)
• Voltmeter(s)
• SMBus/I2C bus analyzer
• Component cooling spray
• Heat gun
General Description of the Evaluation Board
This board demonstrates use of the MIC284 Two-Zone
Thermal Supervisor. It is designed to support rapid prototyping
of circuits employing the MIC284. A MMBT3906 transistor
(surface mount equivalent to 2N3906) is included on the
board in order to demonstrate the MIC284’s ability to measure the temperature of a remote PN junction. A connector
permits use of an external remote diode or transistor in place
of the on-board remote transistor. User configurable jumpers
select the MIC284’s slave address and configure the remote
sensor connections. Two LEDs on the board report the status
of the MIC284’s interrupt request output and critical output
when enabled.
For use with Micrel’s DemoWare demonstration software, the
MIC284 evaluation board may be connected directly to a PC
parallel port via a DB25M connector. As an option, the user
may install a 4-pin ACCESS.bus™-type connector to interface the evaluation board with a serial bus host such as the
IPort™ I2C Host Adapter from MCC Corporation. An additional general-purpose 8-pin header can also be used to
interface any I2C/SMBus host to the board.
General Description
The Micrel MIC284 Evaluation Board and DemoWare Software demonstrate the operation and features of the MIC284
Two-Zone Thermal Supervisor. The MIC284 is a versatile
digital thermal supervisor capable of measuring temperature
using its internal sensor and an inexpensive external sensor
or embedded silicon diode such as those found in higher
performance CPUs and FPGAs. This manual describes how
to use the evaluation board and the companion software.
Getting Started
What is Included
Review the packing list in Table 1 to confirm that you received
all listed items. If any of the items are missing or damaged,
contact Micrel Semiconductor. The latest version of all Micrel
data sheets may be obtained from our website at
www.micrel.com.
Item
1
2
3
4
Qty
1
Description
MIC284 Evaluation Board with
Jumpers Installed
1
MIC284 Evaluation Board and
DemoWare Software Manual
(this document)
1
MIC284 Data Sheet
2
MIC284BM Samples
Table 1. Packing List
What You Must Provide
If the board is to be used with the MIC284 DemoWare, no
additional items are required except for a suitable host PC. All
power for the board will be drawn from the PC parallel port.
The board may be plugged directly into the DB25 connector
on the host PC. It may be more convenient, however, to use
a cable between the PC and the board. A standard, straightthrough, DB25 male-to-female parallel printer cable may be
used. If a non-PC host is used, the following items are
required for use with the MIC284 evaluation board:
DemoWare is a trademark of Micrel, Inc.
SMBus is a trademark of Intel Corporation.
I2C is a trademark of Philips Electronics N.V.
ACCESS.bus is a trademark of the ACCESS.bus Industry Group.
IPort is a trademark of Microcomputer Control Corporation.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
February 2002
1
MIC284 Evaluation Board
MIC284 Evaluation Board and DemoWare Software
Micrel
Optional
SMBus Host
Connector
General-Purpose
Signal Header
P4
J1
S
D
A
EXT
VDD IN
S
C
L
Test
Points
G
N
D
C
R
I
T
A
0
V
D
D
P3
/INT
TEST
VDD
GND
I
N
T
JP5
Address
Configuration
Jumpers
JP3
JP4
A0
/CRIT
U1
SDA
Remote Diode
Selection
Jumpers
JP2
SCL
/INT
Q2
Remote
Sensor
Connection
P2
/CRIT
Micrel, Inc.
408-944-0800
MIC284 Evaluation Board
PC
PARALLEL
PORT
PC Parallel Port Connector
Figure 1. MIC284 Evaluation Board
Serial Bus Host Connector
The optional user-installed SMBus host connector is Molex
part #15-83-0064 shown in Figure 2. This Molex connector is
a 4-conductor shielded receptacle. The pinout of this connector is shown below. The mating connector is a Molex part #1583-1564. See Appendix A for more information on these
connectors. The serial bus signals are also present on singlerow header P4 and at test points TP4 and TP5. One or more
of these connection points can be used in lieu of the specialized connector. The various serial bus connection points are
summarized in Table 2.
Powering the Board
The MIC284 evaluation board can be powered via the host
PC’s parallel printer port or an external power supply. Three
options are available for powering the evaluation board.
Option 1: For use with Micrel’s DemoWare demonstration
software and a host PC, connect the board to the PC’s parallel
printer port via the DB-25M connector (Refer to schematic in
“Hardware Reference”). Pins 1 and 2 of P3 should be shorted.
Option 2: The board can be powered by an external power
supply via TP1,“EXT VDD”, and TP2, “GND”. The positive
connection should be made to TP1 and ground connection
should be made to TP2. Pins 2 and 3 of P3 should be shorted.
Option 3: The board can be powered by a serial bus host
such as the MCC IPort via optional user-installed 4-pin Molex
connector J1. Pin 3 of this connector is assigned to carry the
power supply voltage from the host (See Figure 2). Pins 2 and
3 of P3 should be shorted.
FRONT
CLK VDD
4
3
DATA GND
2
1
Molex 15-83-0064
Figure 2. Pinout of J2 Serial Bus Host Connector
MIC284 Evaluation Board
2
February 2002
MIC284 Evaluation Board and DemoWare Software
Molex
15-83-0064
Pin #
P4 Pin #
Test Point
Serial Data
2
1
TP5
Serial Clock
4
2
TP4
VDD
3
8
TP1
Signal
GND
1
4
TP2
/INT
N/A
3
TP6
N/A
6
TP7
/CRT
Micrel
LED Indicators
The two LEDs on the evaluation board indicate the state of
the /INT output and the /CRIT output. The LED indicators can
be deactivated by opening jumpers JP4 and/or JP5. JP4
enables the /INT LED when shorted; JP5 enables the /CRIT
LED when shorted. When an interrupt is generated by the
MIC284, the signal at the /INT output pin goes from high to
low. This causes the /INT LED to turn on. The /INT LED will
turn off once the interrupt gets cleared. Similarly, when a
critical over-temperature event occurs, the signal at the
/CRIT output will go from high to low. This causes the /CRIT
LED to turn on. The /CRIT LED will turn off once the overtemperature event is cleared.
Factory Settings
The slave address is set to 1001000b=48h and the on-board
remote diode Q2 is connected to T1.
Table 2. Serial Bus Connection Points
Personal computer based host adapters, cables, bus analyzers and other useful items can be obtained from the sources
listed in Appendix A.
Slave Address Selection
The MIC284 slave address must be established for communication with the serial bus host. It is established by setting the
address pin A0 to either logic ‘1’ or logic ‘0’. Table 3 shows the
jumper settings for selecting the slave address. The slave
address of MIC284 is registered only during power-on and
cannot be changed during operation. To change the MIC284
slave address, remove power, establish the new slave address and then reapply power.
Remote Diode Selection
The MIC284 senses the temperature of a remote PN junction
connected to the T1 pin. This PN junction is generally either
a diode-connected bipolar junction transistor or the embedded thermal diode inside an integrated circuit. A diodeconnected 2N3906-type transistor, Q2, is provided on the
evaluation board. Header P2 can be used to connect to an offboard diode. Jumper JP2 selects between Q2 and the offboard sensor connected to P2. (Refer to Table 3.)
Figure 3 shows several examples of remote diode connections. To minimize noise pickup, connections to an off-board
diode should be made using twisted-pair or shielded twistedpair cable. Connections longer than a few inches or any
connection in an electrically noisy environment should use
shielded twisted-pair cable for optimal performance. (Note
that the shield should be grounded only at P2 on the evaluation board.) Suitable cable types include Belden’s part
number 8442 unshielded twisted-pair (UTP) and Belden’s
part number 8451 shielded twisted-pair (STP).
If using a transistor, the base and collector should be shorted
together at the transistor. The emitter and base-collector
terminals are then connected to P2. The emitter is connected
to pin 2 of P2; the base-collector junction should be connected to pin 1 of P2.
Typical PNP bipolar
transistor used as
remote sensor
Twisted-Pair Cable
E
P
B
N
P2
C
Figure 3a. Remote Diode Connections via P2
Shielded Twisted-Pair Cable
Typical PNP bipolar
transistor used as
remote sensor
E
P
B
N
P2
C
Figure 3b. Remote Diode Connections via P2
Twisted-Pair Cable
or
Shielded Twisted-Pair Cable
(shielded twisted-pair cable shown)
Embedded
thermal diode
(in CPU, etc.)
E
P
B
N
P2
C
Figure 3c. Remote Diode Connections via P2
Jumper Settings
Sensor
MIC284 Slave Address
JP3
JP2
T1
Binary
Hex
Shorted
2-3
Q2
100 1000b
48h
Open
2-3
Q2
100 1001b
49h
Shorted
1-2
Off-board via P2
100 1000b
48h
Open
1-2
Off-board via P2
100 1001b
49h
Table 3. MIC284 Slave Address Configuration
February 2002
3
MIC284 Evaluation Board
MIC284 Evaluation Board and DemoWare Software
Micrel
Pull-up Resistors
The MIC284 evaluation board includes a 4.7kΩ pull-up
resistor on the serial data line and the serial clock line, and a
22kΩ resistor on the MIC284’s /INT output and /CRIT output.
When using a serial bus host such as the IPort, the host’s pullup resistors should be deactivated.
Hardware Reference
Terminals
Designator
P2
P3
P4
P5
J1
Test Points
Designator
TP1
TP2
TP3
TP4
TP5
Description
Off-board remote sensor connection
VDD selection jumper
General purpose signal header
Parallel port connector, DB25M PC,
for use with Micrel DemoWare software
Serial bus host connector, 4-pin
Jumper Options
Jumper
Position
JP4
Shorted
Open
JP5
Shorted
Open
JP3
Shorted
Open
JP2
1-2
2-3
P3
1-2
2-3
TP6
TP7
Description
EXTERNAL VDD IN
GROUND
VDD TEST
SERIAL CLOCK
SERIAL DATA
INTERRUPT
CRITICAL
Function
Enables /INT LED
Disables /INT LED
Enables /CRIT LED
Disables /CRIT LED
A0 = 0
A0 = 1
Off-board transistor/diode is used as remote sensor via P2
On-board transistor Q2 is used as remote sensor
Use VDD from PC parallel port
Use VDD from external VDD input or VDD from serial bus host
Factory Setting
Shorted
Shorted
Shorted
Open
Shorted
Shorted
*Pin number one of each header is denoted by a square pad on the PCB versus a round pad for all other pins. The pads are visible on the back side of
the printed circuit board.
MIC284 Evaluation Board
4
February 2002
MIC284 Evaluation Board and DemoWare Software
Micrel
Bill of Materials
Item
Part Number
Manufacturer
Description
C1
ECS-F1CE225K
Panasonic - ECG
2.2µF, 16V, tantalum capacitor
Qty.
1
C2
ECU-S1H104KBB
Panasonic - ECG
0.1µF, 50V, 20% ceramic capacitor
1
C3
ECS-F1CE475K
Panasonic - ECG
4.7µF, 16V tantalum capacitor
1
C4
K222J15C0GF5TL2
BC Components
2200pF, 50V, 5% ceramic capacitor
1
C5
N/A
N/A
Not stuffed
D1
SD101C
Diodes Inc.
Schottky diode, 40V, 400mW, D0-35
1
D2
SD101C
Diodes Inc.
Schottky diode, 40V, 400mW, D0-35
1
D3
SD101C
Diodes Inc.
Schottky diode, 40V, 400mW, D0-35
1
D4
SD101C
Diodes Inc.
Schottky diode, 40V, 400mW, D0-35
1
D5
SD101C
Diodes Inc.
Schottky diode, 40V, 400mW, D0-35
1
J1
N/A
N/A
Not stuffed
N/A
JP1
N/A
N/A
Not stuffed
N/A
JP2
Any
Any
3-pin header
1
JP3
Any
Any
2-pin header
1
JP4
Any
Any
2-pin header
1
N/A
JP5
Any
Any
2-pin header
1
JP6
ZOR-25-B
Yageo
0Ω 1/4W, 5% resistor
1
JP7
N/A
N/A
Not stuffed
N/A
P1
N/A
N/A
Not stuffed
N/A
P2
Any
Any
2-pin header
1
P3
Any
Any
3-pin header
1
P4
Any
Any
8-pin header
1
P5
DB25M
Any
Male parallel port connector
1
/INT
LTL-4203
Lite-On Inc.
Red LED
1
/CRIT
LTL-4203
Lite-On Inc.
Red LED
Q1
N/A
N/A
Not stuffed
Q2
2N3906
Motorola
PNP transistor, TO-92
1
Q3
2N3906
Motorola
PNP transistor, TO-92
1
Q4
2N3906
Motorola
PNP transistor, TO-92
1
R1
CFR-25JB-22K
Yageo
22kΩ 1/4W, 5% resistor
1
R2
CFR-25JB-22K
Yageo
22kΩ 1/4W, 5% resistor
1
R3
CFR-25JB-4K7
Yageo
4.7kΩ 1/4W, 5% resistor
1
R4
CFR-25JB-4K7
Yageo
4.7kΩ 1/4W, 5% resistor
1
R5
CFR-25JB-100K
Yageo
100kΩ, 1/4W, 5% resistor
1
R6
CFR-25JB-100R
Yageo
100Ω 1/4W, 5% resistor
1
R7
CFR-25JB-22K
Yageo
22kΩ 1/4W, 5% resistor
1
R8
CFR-25JB-470R
Yageo
470Ω 1/4W, 5% resistor
1
R9
CFR-25JB-22K
Yageo
22kΩ 1/4W, 5% resistor
1
R10
CFR-25JB-470R
Yageo
470Ω 1/4W, 5% resistor
1
EXT VDD
5007
Keystone Electronics
Color coded PCB test points, white
1
1
N/A
VDD TEST
5007
Keystone Electronics
Color coded PCB test points, white
1
GND
5006
Keystone Electronics
Color coded PCB test points, black
1
SDA
5007
Keystone Electronics
Color coded PCB test points, white
1
SCL
5007
Keystone Electronics
Color coded PCB test points, white
1
/INT
5007
Keystone Electronics
Color coded PCB test points, white
1
/CRIT
5007
Keystone Electronics
Color coded PCB test points, white
1
U1
MIC284-0BM
Micrel Semiconductor
Local/Remote Thermal Supervisor
1
U2
MIC5207-3.3BZ
Micrel Semiconductor
180mA Low Noise LDO Regulator
1
February 2002
5
MIC284 Evaluation Board
MIC284 Evaluation Board and DemoWare Software
Micrel
Schematic
TP1
R6 100Ω
P3
External VDD
PC PORT VDD
3
2
1
1
EXTERNAL VDD IN
TP2
(3.3V)
R1
22kΩ
3 Pin Header
P1
8
7
6
5
4
3
2
1
R2
22kΩ
R3
R4
4.7kΩ 4.7kΩ
R5
100kΩ
A0
/CRIT
TP3
NC
1
/INT
CLOCK
DATA
C2
0.1µF
TP4
TP5
TP6
TP7
1
1
1
1
SCL
SDA
/INT
/CRIT
8 Pin Header
VDD TEST
C3
4.7µF/10V
MIC284-0BM
1
2
3
4
Test Points
4
3
2
1
1
GND
SCL
VDD
SDA
GND
DATA VDD
CLK
A0
/INT
T1
GND /CRIT
8
7
6
5
JP3
2
1
C4
2200pF/50V
2 Pin Header
U1
JP2
3
2
1
J1
Molex 15-83-0064
(71565 Family)
JP4
2 Pin Header
13
25
12
24
11
23
10
22
9
21
8
20
7
19
6
18
5
17
4
16
3
15
2
14
1
P5
2 Pin Header
R7
22kΩ
2 1
JP6
0Ω
JP5
Q2
2N3906
P2
2
1
R9
22kΩ
1 2
(Dedicated Trace)
D1
BAT85
2 Pin Header
D2
BAT85
Q3
2N3906
3
3 Pin Header
U2
IN
OUT
1
GND
2
R8
470Ω
Q4
2N3906
R10
470Ω
MC5207-3.3BZ
LED1
/INTLOW
LED2
/CRITLOW
D3
BAT85
D4
BAT85
C1
2.2µF/10V
D5
BAT85
DB25
MIC284 Evaluation Board
6
February 2002
MIC284 Evaluation Board and DemoWare Software
Micrel
PC Board Layout
PC Board Layout - Top Silkscreen
PC Board Layout - Top
PC Board Layout - Bottom Silkscreen
PC Board Layout - Bottom
February 2002
7
MIC284 Evaluation Board
MIC284 Evaluation Board and DemoWare Software
Micrel
MIC284 DemoWare™ Software
System Requirements
The DemoWare software is designed to run on any personal
computer running Microsoft Windows 95 or 98. A standard
parallel printer port is required for communication with the
MIC284 evaluation board. Once decompressed and installed,
the DemoWare files will occupy approximately 1.9MB of hard
disk space.
Installing the Software
The MIC284 DemoWare is available for download at http://
www.micrel.com. If you are unable to obtain the software
from the Micrel website, please contact a Micrel sales representative for assistance. To install the MIC284 DemoWare:
1. Download the file “MIC1_2_384-demoware.exe”
into a temporary directory. This file is a selfextracting ZIP archive containing the files
MIC1_2_384-demoware.exe and Mfc42.dll.
MIC1_2_384-demoware.exe is the program
itself. Mfc42.dll is a library containing code used
by MIC1_2_384-demoware.exe.
2. Start the extraction process by selecting Run on
the Start menu and choosing the file
MIC1_2_384-demoware.exe. MIC1_2_384demoware.exe and Mfc42.dll will be extracted
and saved into a subdirectory named
MICx84DemoWare in the root directory of the
hard disk. If you wish to use a different directory,
enter its name in the “Unzip to folder” text box or
select the Browse option. This directory will be
created if necessary.
3. Select “Unzip” and the files will be extracted.
4. A message stating “2 file(s) unzipped successfully” will be displayed when the process is
finished. Click “OK” to proceed.
5. Click “Close” to complete the process and exit
the installation utility.
Running the Software
Launch the software by selecting Run on the Start menu and
selecting the file MIC1_2_384-demoware.exe. If the installation defaults were used, this file will be in a subdirectory called
“MICx84DemoWare” in the root directory on the hard disk.
Once the program starts, the main window will be displayed
and power to the evaluation board will be off. Any status or
error messages displayed are not valid until the software is
properly configured and the board is powered on.
Figure 4. MIC284 DemoWare Main Window
Figure 5. Selecting the Printer Port
Figure 6. Selecting the Base Address
Figure 7. Selecting the Chart Recorder Scale
Figure 8. Turning on Power to the
Evaluation Board
MIC284 Evaluation Board
8
February 2002
MIC284 Evaluation Board and DemoWare Software
Micrel
Using the Software
The software must be configured prior to use:
1. Select the printer port to which the board will be connected
using the Port item on the Configure Menu as
shown in Figure 5.
2. Select the MIC284 device by selecting MIC284
on the Device menu. Select the device base
address using the Device Address item on the
Configure menu as shown in Figure 6. The
base address selected must match the jumper
settings on the evaluation board as shown in
Table 3.
3. Adjust the chart recorder scale using the Scale
item on the Configure menu. Only temperature
values between Upper Scale Limit and Lower
Scale Limit will be displayed in the chart
recorder window. Enter the desired values in the
text boxes.
Clicking the Get Current button or any of the
temperature acquisition buttons will automatically turn on
power to the board. The power may also be turned on using
the Device Power item on the Configure menu, as shown in
Figure 8. When power is on, a checkmark will appear next to
Device Power on the Configure menu. (In any case, the
power should be turned off before removing the board from
the PC by selecting the Device Power item on the Configure
menu!)
Once power is turned on, the MIC284 registers will be read
and the current values will be displayed. The main window
should now appear similar to Figure 4.
The main window has several components:
• Temperature acquisition buttons and chart
recorder (Figure 11): A single temperature
sample may be taken by clicking the MANUAL
button. Automatic temperature samples can be
taken at specific intervals by clicking the .5s, 1s,
2s, 5s, 10s, or 20s button. Any temperature
samples taken will be displayed in the chart
recorder area. Data for Zone 0, the internal
zone, will be plotted in green, data for Zone 1,
the external zone, will be plotted in blue.
• Status line (Figure 10): Status messages are
displayed on the status line, including the state
of the serial bus link, the logic state of the /INT
pin, and the states of the Shift Lock and Num
Lock keys.
• Thermometer display (Figure 9): The two
thermometers will be active and display the
reported temperature in degrees Centigrade and
binary for the selected zone. Alarm indications
are also displayed in the thermometer display.
February 2002
• Register display (Figure 12): The values in the
configuration, setpoint, and hysteresis registers
are displayed in this box. The bits of the
configuration register are displayed according
to function. Those bits that are not read-only
can be altered. New values can be entered in
the appropriate text boxes. Merely changing the
values displayed on the screen will not cause
data to be written to the MIC284. The Set New
button must always be used to write any
changes to the part.
Figure 9. Thermometer Displays
Figure 10. Status Line
9
MIC284 Evaluation Board
MIC284 Evaluation Board and DemoWare Software
Micrel
Figure 11. Temperature Acquisition Window
Figure 12. Register Display
MIC284 Evaluation Board
10
February 2002
MIC284 Evaluation Board and DemoWare Software
Micrel
Acquiring Temperature Data
Micrel Data Log File created 10/29/2001 13:58:23
DATE
TIME
ELAPSED SAMPLE INTERNAL REMOTE
10/29/01 13:58:23
0
0
21
23
10/29/01 13:58:24
549
1
21
22
10/29/01 13:58:24 1074
2
21
23
10/29/01 13:58:25 1589
3
21
23
10/29/01 13:58:25 2109
4
21
23
10/29/01 13:58:26 2624
5
21
23
10/29/01 13:58:26 3139
6
21
23
10/29/01 13:58:27 3654
7
21
23
10/29/01 13:58:27 4169
8
21
23
10/29/01 13:58:28 4684
9
21
23
10/29/01 13:58:28 5199
10
21
23
10/29/01 13:58:29 5714
11
21
23
10/29/01 13:58:29 6229
12
21
23
10/29/01 13:58:30 6744
13
21
24
10/29/01 13:58:30 7279
14
21
24
10/29/01 13:58:31 7794
15
21
23
10/29/01 13:58:31 8319
16
21
25
10/29/01 13:58:32 8834
17
22
25
10/29/01 13:58:32 9354
18
23
25
10/29/01 13:58:33 9869
19
24
25
10/29/01 13:58:33 10384
20
24
26
10/29/01 13:58:34 10969
21
24
26
Figure 13. Example Data Log
Single Conversions
Clicking the MANUAL button will cause a single temperature reading to be acquired. This single reading will be
displayed on the appropriate thermometer display and plotted on the chart recorder in the appropriate color. It will also
be recorded to the log file if data logging is turned on. See
“Logging Data to a File” below.
Periodic Sampling
Clicking any one of .5s or 1s or 2s or 5s or 10s or 20s
buttons will initiate repetitive temperature sampling at the
indicated interval. The data acquired will be displayed on the
appropriate thermometer display and plotted on the chart
recorder in the appropriate color. The samples will also be
recorded to the log file if data logging is turned on.
Viewing and Modifying Registers
Get Current
The current values of the configuration, setpoint, and
hysteresis registers can be displayed at any time by clicking
the Get Current button.
Setpoint and Hysteresis Registers
The temperature setpoint and hysteresis registers can be
modified by typing the desired values into the Temperature
Setpoint and Hysteresis text boxes and then clicking the Set
New button. The Set New button must always be used to
write new values to the MIC284 after any setting is modified
on the screen.
Configuration Register
The various functions of the configuration register can be
accessed using the check boxes and radio buttons in the
Device Configuration Register section of the main window.
The Set New button must always be used to write new values
to the MIC284 after any setting is modified on the screen.
An example data file is shown in Figure 13. This file may
be opened in a program such as Microsoft Excel for graphing,
filtering, sorting, manipulation, etc. The first line of the file
identifies the file and the time and date when it was created.
The second line lists the field names for the succeeding lines.
The fields are as follows (in order):
• DATE: The date, according to the PC’s system
clock, that the sample was taken.
• TIME: The time, according to the PC’s system
clock, that the sample was taken.
• ELAPSED: The total elapsed time, in milliseconds, since the first sample was taken.
• SAMPLE: The sample number; samples are
numbered sequentially starting with number one.
• INTERNAL: The measured temperature for the
internal zone, zone 0.
• REMOTE: The measured temperature for the
remote zone, zone 1.
Restoring Register Defaults
Clicking the Restore Defaults button will return all registers
to their default values, similar to the MIC284’s power-on
state.
Logging Data to a File
All temperature data acquired during a given period may
be logged to a file by activating the recording function.
Recording is started by selecting the Record to File... item on
the File menu.
1. Configure the device as desired via the register display
window.
2. Click Set New to update the MIC284’s configuration.
3. Activate data logging by selecting the Record to
File... item on the File menu. Enter the desired
file and path name and click Save. Note that the
log file is a comma-delimited or *.csv file.
4. Acquire temperature data by clicking the .5s, 1s,
2s, 5s, 10s, 20s, or MANUAL button.
5. When finished recording data, stop data logging
by once again selecting the Record to File...
item on the File menu.
February 2002
11
MIC284 Evaluation Board
MIC284 Evaluation Board and DemoWare Software
Micrel
Molex Incorporated
2222 Wellington Court
Lisle, IL 60532-1682
Tel.: 800-78MOLEX,
630-969-4550 (Outside USA)
Fax: 630-968-8356
Telex: 254069
E-mail: [email protected]
http://www.molex.com
Appendix A: SMBus Resources*
PC host adapters and software, bus analyzers, cables,
and other items can be purchased from:
Micro Computer Control Corporation
PO Box 275/ 17 Model Ave.
Hopewell, New Jersey 08525 USA
Tel.: 609-466-1751
Email: [email protected]
http://www.mcc-us.com
Saelig Company
Tel.: 716-425-3753
Fax: 716-425-3835
Email: [email protected]
http://www.memo.com/saelig
The 4-conductor serial bus connector is available from Molex
as part number 15-83-0064. Mating plugs for constructing
cable assemblies are also available. A list of distributors is
available on the Molex website.
MICREL INC.
TEL
The current SMBus specification and other information regarding SMBus may be obtained from the SMBus website
http://www.smbus.org.
*Micrel does not necessarily endorse or recommend any of
the products, services, or information sources listed above.
Micrel is not affiliated in any way with any listed company,
person, or other entity. The above information is presented
without warranty of any kind.
1849 FORTUNE DRIVE SAN JOSE, CA 95131
+ 1 (408) 944-0800
FAX
+ 1 (408) 944-0970
WEB
USA
http://www.micrel.com
This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or
other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc.
© 2002 Micrel Incorporated
MIC284 Evaluation Board
12
February 2002