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Microchip Inte kategoriserad MIC384

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February 2002 1 MIC384 Evaluation Board
MIC384 Evaluation Board
DemoWare™ Software
General Description
The Micrel MIC384 evaluation board and DemoWare Soft-
ware demonstrate the operation and features of the MIC384
Three-Zone Thermal Supervisor. The MIC384 is a versatile
digital thermal supervisor capable of measuring temperature
using its internal sensor and two inexpensive external sen-
sors or embedded silicon diodes such as those found in
higher performance CPUs and FPGAs. This manual de-
scribes how to use the evaluation board and the companion
software.
Getting Started
What is Included
Review the packing list in Table 1 to conrm 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 Qty Description
1 1 MIC384 Evaluation Board with
Jumpers Installed
2 1 MIC384 Evaluation Board and
DemoWare Software Manual
(this document)
3 1 MIC384 Data Sheet
4 2 MIC384BM Samples
Table 1. Packing List
What You Must Provide
If the board is to be used with the MIC384 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, straight-
through, 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 MIC384 evaluation board:
Micrel, Inc. 1849 Fortune Drive San Jose, CA 95131 USA tel + 1 (408) 944-0800 fax + 1 (408) 944-0970 http://www.micrel.com• • • • • •
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.
• 3.3V, 100mA regulated power supply
• Power supply leads or cables
• SMBus™/I2C™ compatible serial bus host for communi-
cation with the MIC384
• 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 MIC384 Three-Zone
Thermal Supervisor. It is designed to support rapid prototyping
of circuits employing the MIC384. Two MMBT3906 transis-
tors (surface mount equivalent to 2N3906) are included on
the board in order to demonstrate the MIC384’s ability to
measure the temperature of remote PN junctions. A connec-
tor permits use of an o-board remote diode or transistor in
place of either of the on-board remote transistors. User
congurable jumpers select the MIC384’s slave address and
congure the remote sensor connections. An LED on the
board reports the status of the interrupt request output, /INT.
The LED may be disabled by opening a jumper.
For use with Micrel’s DemoWare demonstration software, the
MIC384 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 inter-
face the evaluation board with a serial bus host such as the
IPort™ I2C Host Adapter from MCC Corporation. An addi-
tional general-purpose 8-pin header can also be used to
interface any I2C/SMBus host to the board.
MIC384 Evaluation Board and DemoWare Software Micrel
MIC384 Evaluation Board 2 February 2002
Test
Points
Micrel, Inc.
408-944-0800
MIC384 Evaluation Board
I
N
T
S
C
L
S
D
A
G
N
D
V
D
D
A
0
C
R
I
T
Q2
P3
JP4
P4 J1
/INT
JP2
JP3
A0
P2
JP1
P1
U1
PC
PARALLEL
PORT
/INT
SCL
General-Purpose
Signal Header
Optional
SMBus Host
Connector
SDA
GND
TEST
VDD
EXT
VDD IN
Remote
O-Board Sensor
Connection
Remote Diode
Selection
Jumpers
PC Parallel Port Connector
Remote
O-Board Sensor
Connection
Remote Diode
Selection
Jumpers
Address
Conguration
Jumpers
Q1
Figure 1. MIC384 Evaluation Board
Powering the Board
The MIC384 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, . The positive“ ” “ ”GND
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.
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 connec-
tor is shown below. The mating connector is a Molex part #15-
83-1564. See Appendix A for more information on these
connectors. The serial bus signals are also present on single-
row header P4 and at test points TP4 and TP5. One or more
of these connection points can be used in lieu of the special-
ized connector. The various serial bus connection points are
summarized in Table 2.
FRONT
Molex 15-83-0064
CLK VDD DATA GND
4 3 2 1
Figure 2. Pinout of J2 Serial Bus Host Connector
February 2002 3 MIC384 Evaluation Board
MIC384 Evaluation Board and DemoWare Software Micrel
Molex
15-83-0064
Signal Pin # P4 Pin # Test Point
Serial Data 2 1 TP5
Serial Clock 4 2 TP4
VDD 3 8 TP1
GND 1 4 TP2
/INT N/A 3 TP6
Table 2. Serial Bus Connection Points
Personal computer based host adapters, cables, bus analyz-
ers and other useful items can be obtained from the sources
listed in Appendix A.
Slave Address Selection
The MIC384 slave address must be established for commu-
nication with the serial bus host. It is established by setting the
address pin A0 to either logic or logic . Table 3 shows the‘ ’1‘ ’0
jumper settings for selecting the slave address. The slave
address of MIC384 is registered only during power-on and
cannot be changed during operation. To change the MIC384
slave address, remove power, establish the new slave ad-
dress and then reapply power.
Remote Diode Selection
The MIC384 senses the temperatures of remote PN junction
connected to the T1 pin and T2 pin. This PN junction is
generally either a diode-connected bipolar junction transistor
or the embedded thermal diode inside an integrated circuit.
Diode-connected 2N3906-type transistors, Q1 and Q2, are
provided on the evaluation board. Header P1 and P2 can be
used to connect to an o-board diode. Jumper JP1 selects
between Q1 and the sensor connected to P1. Similarly
jumper JP2 selects between Q2 and the sensor connected to
P2. (Refer to Table 3.)
Figure 3 shows several examples of remote diode connec-
tions. To minimize noise pickup, connections to an o-board
diode should be made using twisted-pair or shielded twisted-
pair 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 P1/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 P1/P2. The emitter is con-
nected to pin 2 of P1/P2; the base-collector junction should be
connected to pin 1 of P1/P2.
LED Indicator
The LED on the evaluation board indicates the state of the /
INT output. When an interrupt is generated by the MIC384,
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 o once
the interrupt gets cleared. The LED indicator can be deacti-
vated by opening jumper JP4. JP4 enables the /INT LED
when shorted; opening the jumper disables the LED.
Factory Settings
The slave address is set to 1001000b=48h and remote on-
board diodes Q1 and Q2 are connected to T1 and T2
respectively.
P
N
P1/P2
B
E
C
Twisted-Pair Cable
Typical PNP bipolar
transistor used as
remote sensor
Figure 3a. Remote Diode Connections via P1/P2
P
N
P1/P2
B
E
C
Shielded Twisted-Pair Cable
Typical PNP bipolar
transistor used as
remote sensor
Figure 3b. Remote Diode Connections via P1/P2
P
N
P1/P2
B
E
C
Twisted-Pair Cable
or
Shielded Twisted-Pair Cable
(shielded twisted-pair cable shown)
Embedded
thermal diode
(in CPU, etc.)
Figure 3c. Remote Diode Connections via P1/P2
Jumper Settings Sensor MIC384 Slave Address
JP1 JP2 JP3 T1 T2 Binary Hex
2-3 2-3 Shorted Q1 Q2 100 1000b48h
1-2 2-3 Shorted Off-board via P1 Q2 100 1000b48h
2-3 1-2 Shorted Q1 Off-board via P2 100 1000b48h
1-2 1-2 Shorted Off-board via P1 Off-board via P2 100 1000b48h
2-3 2-3 Open Q1 Q2 100 1001b49h
1-2 2-3 Open O-board via P1 Q2 100 1001b49h
2-3 1-2 Open Q2 O-board via P2 100 1001b49h
1-2 1-2 Open Off-board via P1 Off-board via P2 100 1001b49h
Table 3. MIC384 Slave Address Conguration
MIC384 Evaluation Board and DemoWare Software Micrel
MIC384 Evaluation Board 4 February 2002
Jumper Options
Jumper Position Function Factory Setting
JP4 Shorted Enables /INT LED Shorted
Open Disables /INT LED
JP3 Shorted A0 = 0 Shorted
Open A0 = 1
JP2 1 - 2 O-board transistor/diode is used as remote sensor via P2 Open
2 - 3 On-board transistor Q2 is used as remote sensor Shorted
JP1 1 - 2 O-board transistor/diode is used as remote sensor via P1 Open
2 - 3 On-board transistor Q1 is used as remote sensor Shorted
P3 1 - 2 Use VDD from PC parallel port Shorted
2 - 3 Use VDD from external VDD input or VDD from serial bus host
*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.
Pull-up Resistors
The MIC384 evaluation board includes a 4.7k pull-upΩ
resistor on the serial data line and the serial clock line, and a
22kΩ resistor on the MIC384’s /INT output. When using a
serial bus host such as the IPort, the host s pull-up resistors’
should be deactivated.
Test Points
Designator Description
TP1 EXTERNAL VDD IN
TP2 GROUND
TP3 VDD TEST
TP4 SERIAL CLOCK
TP5 SERIAL DATA
TP6 INTERRUPT
Hardware Reference
Terminals
Designator Description
P3 VDD selection jumper
P4 General purpose signal header
P1 Off-board remote sensor connection
P2 Off-board remote sensor connection
P5 Parallel port connector, DB25M PC,
for use with Micrel DemoWare software
J1 Serial bus host connector, 4-pin
February 2002 5 MIC384 Evaluation Board
MIC384 Evaluation Board and DemoWare Software Micrel
Bill of Materials
Item Part Number Manufacturer Description Qty.
C1 ECS-F1CE225K Panasonic - ECG 2.2µF, 10V, tantalum capacitor 1
C2 ECU-S1H104KBB Panasonic - ECG 0.1µF, 50V, 20% ceramic capacitor 1
C3 ECS-F1CE475K Panasonic - ECG 4.7µF, 10V tantalum capacitor 1
C4 K222J15C0GF5TL2 BC Components 2200pF, 50V, 5% ceramic capacitor 1
C5 K222J15C0GF5TL2 BC Components 2200pF, 50V, 5% ceramic capacitor 1
D1 BAT85 Diodes Inc. Schottky diode, 40V, 400mW, D0-35 1
D2 BAT85 Diodes Inc. Schottky diode, 40V, 400mW, D0-35 1
D3 BAT85 Diodes Inc. Schottky diode, 40V, 400mW, D0-35 1
D4 BAT85 Diodes Inc. Schottky diode, 40V, 400mW, D0-35 1
D5 BAT85 Diodes Inc. Schottky diode, 40V, 400mW, D0-35 1
J1 15-84-0064 Molex SMBus host connector 1
JP1 Any Any 3-pin header 1
JP2 Any Any 3-pin header 1
JP3 Any Any 2-pin header 1
JP4 Any Any 2-pin header 1
JP5 N/A N/A Not stuffed N/A
JP6 N/A N/A Not stuffed N/A
JP7 ZOR-25-B Yageo 0Ω 1/4W, 5% resistor 1
P1 Any Any 2-pin header 1
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 N/A N/A Not stuffed N/A
Q1 2N3906 Motorola PNP transistor, TO-92 1
Q2 2N3906 Motorola PNP transistor, TO-92 1
Q3 2N3906 Motorola PNP transistor, TO-92 1
Q4 N/A N/A Not stuffed N/A
R1 N/A N/A Not stuffed N/A
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 N/A N/A Not stuffed N/A
R10 N/A N/A Not stuffed N/A
EXT VDD 5007 Keystone Electronics Color coded PCB test points, white 1
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 N/A N/A Not stuffed N/A
U1 MIC384-0BM Micrel Semiconductor Local/Remote Thermal Supervisor 1
U2 MIC5207-3.3BZ Micrel Semiconductor 180mA Low Noise LDO Regulator 1
MIC384 Evaluation Board and DemoWare Software Micrel
MIC384 Evaluation Board 6 February 2002
Schematic
2
3
4
5
1
6
7
8
SCL
VDD
SDA
GND
8 Pin Header
J1
Molex 15-83-0064
(71565 Family)
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
4
3
2
1
D1
BAT85
D2
BAT85
R8
470Ω
LED1
/INTLOW
Q3
2N3906
C1
2.2 F/10Vµ
MC5207-3.3BZ
13
2
D4
BAT85
D3
BAT85
D5
BAT85
P5
DB25
U2
Test Points
1
/INT
TP6
1
SDA
TP5
1
SCL
A0
/INT
NC
NC
CLOCK
DATA
TP4
Q2
2N3906
P4
External VDD 2
3
1
3 Pin Header
(3.3V)
P3
PC PORT VDD
2
3
1
3 Pin Header
JP2
2
3
1
3 Pin Header
JP1
2
1
2 Pin Header
JP3
2
1
2 Pin Header
P2
2
1
2 Pin Header
P1
(Dedicated Trace)
(Dedicated Trace)
JP7
0Ω
R6 100Ω
R2
22kΩ
R3
4.7kΩ
R4
4.7kΩ
R5
100kΩ
U1
1
2
3
4
8
7
6
5
VDD
A0
T1
T2
DATA
CLK
/INT
GND
MIC384-0BM
EXTERNAL VDD IN
1
TP1
GND
1
TP2
VDD TEST
1
TP3
C3
4.7 F/10Vµ
C4
2200pF/50V
C2
0.1µF
GND
OUTIN
2 Pin Header
2 1
JP4
R7
22kΩ
C5
2200pF
Q1
2N3906

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