1
LM86, LM89, LM89-1, LM90, LM99, LM99-1 Evaluation Board
User’s Guide
Copyright 2003 National Semiconductor Corporation
1
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Table of Contents
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3, 4
2.0 Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1
2.2
2.3
2.4
2.5
Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Test Setup – Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Test Setup - Hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Test Setup – System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.0 Connection Details. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.0 Schematic of LMxx Evaluation Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.0 Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2
3
1.0 Introduction
The LMxxEVAL kit (xx = 86, 89, 89-1, 90, 99, 99-1) includes the following items:
1. The LMxx Evaluation Board (for LM86, LM89, LM89-1, LM90, LM99, LM99-1 products)
2. The SensorEval Software CD, including
a. the readme.txt file (read this first)
b. the installation setup file,
c. the SensorEval Software manual, and
d. this manual.
The LMxx Evaluation Board, as shown in Figure 1, is a complete PCBA (printed circuit board
assembly). The board has a USB connector, a voltage regulator circuit, a microcontroller, an
EEPROM, and a LMxx Remote Diode Temperature Sensor. A schematic and bill of materials is
included in this User’s Guide. Figure 1 shows the location of pin1 for the device under test.
Pin 1
LMxx
Figure 1. The LMxx Evaluation Board showing pin 1
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4
1.0 Introduction (Continued)
The LMxxEVAL kit includes the SensorEval software, which is provided by National Semiconductor to
communicate with the LMxx Evaluation Board by way of the USB cable (not provided) from the
controlling computer. The SensorEval software is used to control the writing and reading of the digital
registers in the LMxx for doing the initial register setup, reading the local and remote temperatures,
establishing certain temperature limit setpoints.
For the installation procedure for the SensorEval software see the readme.txt file on the SensorEval
software CD. For detailed use of the LMxx software used with the LMxx Evaluation Board, please
refer to the SensorEval software user’s guide on the CD. The LMxx datasheet is available at
www.national.com.
2.0 Getting Started
2.1 Required Equipment
In order to use the LMxx Evaluation Board you will need to have the following required pieces of
equipment:
1. A computer with at least a Pentium III processor, running Microsoft Windows
operating system, with 20 MB of free disk space, and at least one USB port
98/2000/XP1
2. A standard USB cable (3 foot length should be sufficient) for connecting the computer to the
LMxx Evaluation Board.
If it is desired to run the software only, without the LMxx Evaluation board, omit item 2 and proceed to
paragraph 2.3.
2.2 Optional Equipment
Optional pieces of equipment are as follows:
1. Remote Diode with wired connector to connect to a female 2-pin header, 0.1 in centers
2. Test equipment such as a digital voltmeter or oscilloscope.
2.3 Test Setup - Software
First, see the readme.txt file on the SensorEval CD for the latest installation instructions. Follow the
installation procedures to load the software on the computer and, if desired, to verify the operation of
the LMxx Evaluation Board.
The SensorEval icon will be on the desktop window after the software installation.
For use with the LMxx Evaluation Board disconnect the USB cable from the board and proceed to the
next section for the hardware setup.
If it is desired to run the software, without the LMxx Evaluation Board, please proceed to the next
section for the hardware setup.
1
Microsoft , Windows , XP
are registered trademarks of Microsoft Corporation.
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5
2.0 Getting Started (continued)
2.4 Test Setup – Hardware
Figure 2 below shows an example of a typical LMxx Evaluation Board test setup.
J4
Computer
USB Port
Connection
Q1
J3
U3
JP2
LMxx
NC
7
TCRIT#
6
NC
5
ALERT#
4
SCL
3
SDA
2
+3.3
1
No
jumpers
required
National Semiconductor
LM86 Evaluation Board Rev. 2
LMxx = LM86, LM89, LM89-1, LM90, LM99, or LM99-1
Figure 2. Test Setup using the LMxx Evaluation Board
No jumpers are required on header JP2.
Hardware Test Setup Procedure
1. The LMxx Evaluation Board comes with jumpers installed on J4, which connects the on-board
MMBT3904 diode-connected transistor to the input of the LMxx chip.
2. Connect the USB cable from the computer’s USB port to the LMxx Evaluation Board.
3. Start the SensorEval software.
2.5 Test Setup – System
For continuous temperature readings select the read continuous check box.
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3.0 Connection Details
Table 1 below describes all the connections and test points of the LMxx evaluation board.
Table 1. LMxx Evaluation Board Connections and Test Points
Description of the Connections
Symbol
J3
This is the USB Type B connector to connect to the computer.
J4
This allows the user to either: (1) connect jumpers horizontally to the top and bottom pin
pairs to connect to the on-board MMBT3904 or (2) to remove the jumpers and connect a
remote diode directly to the input of the LMxx.
JP2
TCRIT# and ALERT# are the open drain LMxx output pins VDC (+3.3 VDC), and the
SMBus Clock and Data signals are available to the user for system monitoring.
JP2
NC
TCRIT
NC
ALERT#
SCL
SDA
Connection to On-board
Remote Diode
Connection to off-the-board
Remote Diode
+3.3
Jumper
MMBT3904
B, C
E
D+ of LMxx
D+ of LMxx
J4
J4
D- of LMxx
D- of LMxx
Jumper
Figure 3. Header Connectors on the LMxx Evaluation Board
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4.0 Schematic of the LMxx Evaluation Board
+ 3.3 VDC
C1
0.1uF
D+
GND
SHELL_1
SHELL_2
2
24
R9 22
3
4
5
6
25
R11 1.5K
+ 3.3 VDC
R12
1M
A0
Vcc
A1
WP
A2
SCL
Vss
SDA
18
8
7
R13
1.5K
R14
1.5K
10
11
12
USBD-
SCL
2
5
SDA
3
7
6
XIN
PB6/INT6
PB7/T2OUT
CTL2/AOUTFLAG
CTL0/AINFLAG
PC0/RxD0
PC1/TxD0
U2
DISCON#
CY7C64603-52NC
PA4/FWR#
PA5/FRD#
CLKOUT
C20
0.1uF
6
20
29
30
31
32
33
34
USBD+
SCL
SDA
C11
C12
2.2uF
0.1uF
C13
R2
1.5K
100 pF
R15
1.5K
TP3
GND
U3
XOUT
RESET#
RESERVED_7
PB0/T2
PB1/T2EX
PB2/RXD1
PB3/TXD1
PB4/INT4
PB5/INT5#
R7 22
TP2
GND
1M
28
1
R1
0
C10
33pF
R4
R3
100k
C17
0.1uF
C18
0.1uF
U4
AT24C02-10SI-2.7
4
C16
2.2uF
C6
0.1uF
PC2/INT0#
PC3/INT1#
PC4/T0
PC5/T1
PC6/WR#
PC7/RD#
LMxx
Q1
MMBT3904/SOT
J4
HEADER 2x2
2
1
4
3
35
36
37
41
43
44
1
C19
2.2 nF
Shunt to select the PCB
temperature diode.
45
TCRIT
46
ALERT#
2
3
4
+3.3 VDC
VDD
SMBCLK
D+
SMBDAT
D-
ALERT#
TCRIT#
GND
8
SCL
7
SDA
6 ALERT#
SCL
SDA
ALERT#
5
JP2
1
3
2
4
5
TCRIT
6
7
ALERT#
48
49
50
51
HEADER 1X7
TP4
GND
WAKEUP#
AGnd
Gnd1
Gnd2
Gnd3
Gnd4
Gnd5
Gnd6
XCLKSEL
XCLK
RDY2/AOE
RESERVED_1
RESERVED_2
RESERVED_3
RESERVED_4
RESERVED_5
D-
C15
0.1uF
C5
0.1uF
GND
4
8
13
21
26
39
47
52
16
38
42
9
15
17
22
23
VBUS
3
C9
33pF
5
1
14
27
40
19
C14
2.2uF
J3
USB-B
2
3
GND
1 uH
1
OUT
C4
0.1uF
TP1
+ 3.3 VDC
Y1
12 MHz
AVcc
Vcc1
Vcc2
Vcc3
Vcc4
RESERVED_6
L1
IN
C3
0.1uF
+ 3.3 VDC
U1
LP2950CDT-3.3/TO252
1
C2
0.1uF
Use a 0.1 uF capacitor for each
Vcc pin of U2 and Reserved_6 pin.
SCL
SDA
Figure 4. LMxx Evaluation Board Schematic
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5.0 LMxx Evaluation Board - Bill of Materials
Item Quantity
Reference
Part
______________________________________________
1
11
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
33
34
2
3
1
1
1
1
1
1
1
1
5
1
2
2
4
1
1
1
1
1
1
C1,C2,C3,C4,C5,C6,C12, Capacitor, ceramic,0.1uF
C15,C17,C18,C20
C9,C10 Capacitor, ceramic,33pF
C11,C14,C16 Capacitor, ceramic,2.2uF
C13
Capacitor, ceramic,100 pF
C19
Capacitor, ceramic,2.2 nF
JP2
Header 1x7
J3
Connector, USB-B
J4
Header 2x2
L1
Filter, 1uH, Stewart MI1206K900R-00
Q1
Transistor, NPN, MMBT3904
R1
Resistor, SMT,0 Ohm
R2,R11,R13,R14,R15 Resistor, SMT,1.5K
R3
Resistor, SMT,100k
R4,R12 Resistor, SMT,1M
R9,R7 Resistor, SMT,22 Ohm
TP1,TP2,TP3,TP4
Header 1x1
U1
IC, 3.3 VDC Voltage Regulator, National LP2950CDT-3.3/TO252
U2
IC, microcontroller, Cypress CY7C64603-52NC
U3
LMxx Part
U4
IC, EEPROM, Atmel AT24C02-10SI-2.7
Y1
Crystal, 12 MHz, Pletronics 2S1200G140
Circuit Board, Fabricated, LM86 Evaluation Board, Rev 2
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