Microchip MIC284 Manual

Microchip Ikke kategoriseret MIC284

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February 2002 1 MIC284 Evaluation Board
MIC284 Evaluation Board
DemoWare™ Software
General Description
The Micrel MIC284 Evaluation Board and DemoWare Soft-
ware 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 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 MIC284 Evaluation Board with
Jumpers Installed
2 1 MIC284 Evaluation Board and
DemoWare Software Manual
(this document)
3 1 MIC284 Data Sheet
4 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, 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 MIC284 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 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 mea-
sure 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 congurable jumpers
select the MIC284’s slave address and congure 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 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.
MIC284 Evaluation Board and DemoWare Software Micrel
MIC284 Evaluation Board 2 February 2002
Figure 1. MIC284 Evaluation Board
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.
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
Test
Points
Micrel, Inc.
408-944-0800
MIC284 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
JP4JP5
P4 J1
/INT
/CRIT
JP2
JP3
A0
P2
U1
PC
PARALLEL
PORT
/CRIT
/INT
SCL
General-Purpose
Signal Header
Optional
SMBus Host
Connector
SDA
GND
TEST
VDD
EXT
VDD IN
Remote
Sensor
Connection
Remote Diode
Selection
Jumpers
PC Parallel Port Connector
Address
Conguration
Jumpers

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC284

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