Microchip MIC280 Manual

Microchip Ikke kategoriseret MIC280

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February 2002 1 MIC280 Evaluation Board
MIC280 Evaluation Board
DemoWare™ Software
General Description
The Micrel MIC280 evaluation board and DemoWare™ soft-
ware demonstrate the operation and features of the MIC280
Precision IttyBitty™ Thermal Supervisor. The MIC280 is a
versatile digital thermal supervisor capable of measuring
internal temperature and remote temperature. This manual
describes how to use the evaluation board and the compan-
ion 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 MIC280 Evaluation Board with
Jumpers Installed
2 1 MIC280 Evaluation Board and
DemoWare Software Manual
(this document)
3 1 MIC280 Data Sheet
4 2 MIC280-0BM6 Samples
Table 1. Packing List
What You Must Provide
If the board is to be used with the MIC280 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 cable may be used. The
MIC280 DemoWare software may be downloaded from
Micrel’s website at
http://www.micrel.com
. Instructions for
installing this software are included.
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.
IttyBitty 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.
If a non-PC host is used, the following items are required for
use with the MIC280 evaluation board:
• 3.3V, 100mA regulated power supply
• Power supply leads or cables
• SMBus™/I2C™ compatible serial bus host for communi-
cation with the MIC280
• 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 MIC280 Precision IttyBitty
Thermal Supervisor. It is designed to support rapid prototyping
of circuits employing the MIC280. A MMBT3906 transistor
(surface mount equivalent to 2N3906) is included on the
board in order to demonstrate the MIC280’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 remote sensor connections and the voltage source
for powering the MIC280. An LED reports the status of the
MIC280’s interrupt request output when enabled.
For use with Micrel’s DemoWare demonstration software, the
MIC280 Evaluation Board may be connected directly to a PC
parallel port via a DB25M connector. As an option, the user
may install a four-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 5-pin header can also be used to
interface any I2C/SMBus host to the board.
MIC280 Evaluation Board and DemoWare Software Micrel
MIC280 Evaluation Board 2 February 2002
Figure 1. MIC280 Evaluation Board
Powering the Board
The MIC280 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
the
Hardware Reference
section). Pins 1 and 2 of JP1 should
be shorted.
Option 2: The board can be powered by an external power
supply via TP6 and TP7 test points. The positive connection
should be made to TP6 and the ground connection should be
made to TP7. Pins 2 and 3 of JP1 should be shorted.
Option 3: The board can be powered by a serial bus host
such as the MCC IPort™ via an optional user-installed 4-pin
Molex connector, J2. Pin 3 of this connector is assigned to
carry the power supply voltage from the host. (See Figure 2)
Pins 1 and 2 of JP1 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 P1 and at test points TP3 and TP4. 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
MIC280 Evaluation Board
D
A
T
A
C
L
K
I
N
T
G
N
D
E
X
T
V
D
D
Q1
Q1
T1
GND
GND
GND
VDD
JP6
JP5
JP1
JP4JP3JP2
P1
J2
/INT
INT EXT
LED ON
TP7
TP1
TP2
TP6
EXT VDD
280 VDD
BUS VDD
U1
J1
TP5
TP4
TP3
/INT
CLK
DATA
General-Purpose
Signal Header
Optional
SMBus Host
Connector
VDD
Input
Selection
Jumpers
Remote
Sensor
Connection
Test
Points
PC Parallel Port Connector

Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC280

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