LM85/LM96000 Evaluation Board User’s Guide
© Copyright 2004 National Semiconductor Corporation
1
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LM85/LM96000 Evaluation Board User’s Guide
Revision A
December 8, 2004
LM85/LM96000 Evaluation Board User’s Guide
Table of Contents
Table of Contents
2
References
3
1.0 Introduction
4
2.0 Quick Start
2.1 Quick Start Diagram
5-7
8
3.0 Functional Description
9
4.0 Software Installation and Operation
10
5.0 Electrical and Mechanical Specifications
11
5.1 Electrical Specifications
11
5.2 Electrical Schematic
11-12
5.3 Evaluation Board Layout
13
5.4 Bill of Materials
14
5.5 Mechanical Specifications
5.5.1 LM85/LM96000 Evaluation Board Basic Dimensions
5.5.2 Electrostatic Discharge (ESD) precautions
15
15
15
Appendix A LM85/LM96000 Evaluation Board Connectors and Test Points.
© Copyright 2004 National Semiconductor Corporation
2
16-18
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LM85/LM96000 Evaluation Board User’s Guide
References
1. LM85 or LM96000 datasheet.
The latest copy of the LM85 or LM96000 datasheet can be obtained by going to
the National Semiconductor website www.national.com. Search for “LM85” or
“LM96000”, and then download the LM85.pdf or LM96000.pdf file.
2. SensorEval Version 1.06 or later, Evaluation Board CD containing:
a. The SensorEval.exe executable program used to run the LM85/LM96000
Evaluation Board.
b. A softcopy of this User’s Guide
c. A readme.txt file with useful information about the program.
d. A softcopy of the SensorEval Software manual.
© Copyright 2004 National Semiconductor Corporation
3
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1.0 Introduction
The LM85/LM96000 Evaluation Board is used
together
with
National
Semiconductor
SensorEval software (provided in the kit), and
with a USB cable (not provided in the kit), and
with an external personal computer (PC).
Power to the LM85/LM96000 Evaluation Board
is provided by the +5VDC line of the USB
connection. An external power supply for fan
power is required for operation of the
LM85/LM96000 Evaluation Board with the 3terminal DC fans. The third terminal of the fan is
the open-collector fan tachometer (tach) output.
It is recommended that the user only use 2 fans
at a time to avoid overloading the USB’s 5 V
line. See the operational details in this user’s
guide.
computer and then to the LM85/LM96000
Evaluation Board.
The PC should be able to recognize the USB
board and install the driver from the software.
The block diagram below describes the
LM85/LM96000 Evaluation Board itself. The
USB input provides the +5.0 VDC power to the
board, which is regulated down to 3.3 VDC to
power the IC’s on the board. The EEPROM is
programmed at the factory with a unique ID
code for this particular board. When the USB
cable is plugged in, the PC interrogates the
USB devices and can identify this device as the
LM85/LM96000 Evaluation Board.
The microcontroller on the board provides the 2wire serial clock (SC), and serial data (SDA)
signals, and relays the information from the
LM85/LM96000 to the PC via the USB lines.
Before connecting the PC to the
LM85/LM96000 Evaluation Board through the
USB cable, the PC is first turned on and allowed
to go through its boot-up procedure. The user
installs and initiates the SensorEval software.
See Section 4.0 for details.
Appendix A provides details for each of the
connectors and test points and their function.
After the SensorEval software is running, the
user can connect the USB cable first to the
Read this user’s guide completely before using
the LM85/LM96000 Evaluation Board.
1.1 Block Diagram
Voltage
Regulator
Circuit
+5.0 VDC
GND
USB
Input
+3.3 VDC
SCL
Micro-controller
Circuitry
USB D+
EEPROM
Circuit
SDA
USB DJ2
Power and Serial
+3.3V
J8
Remote 1
SCL
D1+
SDA
J10
Remote 2
GND
VID0
D1-
VID1
VID2
D2+
J4
VID
Signals
VID3
D2-
+1.05 V
Fan V+
+2.43 V
+5.0 VDC
U4
LM85 or
LM96000
+5V or +12V
for fan plus 0.8 VDC
PWM2
5V
TACH1
12V
TACH2
2.5V
TACH3
VCCP
TACH4
12
MHz
Fan V-
PWM1
PWM3
J6
Voltage
Monitors
J3
Fan Power
Fan V+
VID4
Crystal
Reference
Fan Tach1
Fan
Driver
Circuitry
and
TachInput
Circutry
Fan V+
Fan 1 GND
Fan Tach2
Fan V+
Fan 2 GND
Fan Tach3
Fan V+
Fan 3 GND
Fan Tach4
Fan V+
Fan 4 GND
© Copyright 2004 National Semiconductor Corporation
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temperature readings of the 3 zones (the
internal temperature of the temperature
sensor device, or the temperature of one of
the MMBT3904’s). Notice the DC voltages on
the voltage monitoring registers and pins.
(See the Schematic in Section 5.2). The
“12V” pin is connected to the Fan+ Voltage.
This screen also shows the Fan 1 and Fan 2
tachometer readings if the fans are
connected and the power is on.
2.0 Quick Start
1. Install the CD into the CD drive of the
computer and install the SensorEval
software (see Section 4.0).
2. Hookup the USB cable between the PC or
notebook computer as shown in the Quick
Start Diagram in Section 2.1.
3. Run the SensorEval software by clicking on
the icon on the desktop. LM85 Example: the
first screen should look like this:
5. For the user to be able to change the
register settings click on the 40-41 tab. For
Register 40 “START”, select “Register Limits”
from the pull-down menu.
Select the Evaluation Board radio button.
Click OK.
4. The next screen will look like this:
Select the Read Continuous (Cont) box to
refresh the data continuously. Note that the
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2.0 Quick Start (continued)
Notice that Registers 2D and 2C shows
the tach RPM value for Fan 3, and
Registers 2E and 2F show the value for the
tach RPM value for Fan 4.
6. For direct control of the fans click on the
58-5F tab. For Registers 5C, 5D, and
5E, change the “Fan on Full Always” to
“Fan Control Manually (test)” for each
one.
8. The user may experiment with all of the
combinations of the other registers,
setting limits and discovering how the
registers affect the performance. The
entire matrix of test combinations is
beyond the scope of this user’s guide.
7. Select tab 2C-3F and change Registers
30, 31 and 32, the PWM Duty Cycle, to
manually change the speed of each fan.
Register 32 controls fans 3 and 4.
© Copyright 2004 National Semiconductor Corporation
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10. The user can change the time interval for
the data to be taken. Simply select File, then
Set Read Time, and the following block will
appear.
2.0 Quick Start (continued)
9.
One of the features of the SensorEval
software is the plotting feature. If the user
clicks on the Start Plot button a graph box
will appear and will graph the temperatures,
Voltages, RPM, and % Duty Cycle. An
example of the four plots is shown below.
When the user makes the selection and clicks
on OK that interval is set from that time on while
the program is running.
11. If the user clicks on the Start Log button the
screen shown below will appear. The user
selects the directory that the datafile is to be
written into and the filename. When “Open” is
clicked the data is taken and logged into the
datafile at whatever rate is set in the Set Read
Time menu.
© Copyright 2004 National Semiconductor Corporation
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2.1 Quick Start Diagram
Important! An EXTERNAL POWER SUPPLY is required for operation of the fans!
WARNING! Use only 2 fans at a time during the tests to avoid overloading the +5V line coming from
the USB terminal. It is suggested that the user use either Fans 1 and 2, or Fans 3 and 4, during the
tests. Fans may be of the 5 volt or 12 volt 3-terminal variety but the current rating of each fan must be
under 200 mA.
GND
J11
VCCP
TP5
2.5V
5V
12V
TACH1
TACH2
TACH3
GND
J4
TACH4
PWM1
National Semiconductor
PWM2
PWM3
VID4
VID3
VID2
VID1
VID0
TP2
TP10
GND
TP4
GND
J6
LM85/96000 Evaluation Board
Rev. 1
U4
U3
GND
J8
Q3
SDA
J2
SCL
+3.3V
Q4
LM85
LM96000
J10
TP9
U2
FAN
POWER
+5V or
+12V
GND
Q6
J3
GND
TP3
TP8
J1
U1
Q1
J5
Q7
Q2
TP7
J7
TP11
J12
FAN V+
Q5
TP6
J9
GND
TP8
GND
TP1
FAN GND
TACH 4
FAN GND
FAN V+
TACH 2
GND
FAN V+
FAN GND
TACH 1
GND
FAN GND
FAN V+
TACH 3
GND
GND
Figure 2.1.1 Physical Layout of the LM85/LM96000 Evaluation Board
VCCP
2.5
V
12V
5V
TACH1
TACH2
TACH3
TACH4
PWM1
PWM2
TP2
GND
J4
National Semiconductor
LM85/96000 Evaluation Board
Rev. 1
PWM3
VID4
VID3
Desktop or
Notebook PC with
SensorEval Software
installed
VID2
VID1
VID0
TP10
GND
TP5
J6
GND
J11
U4
U3
TP4
GND
Fan
Power
Supply
J8
GND
Q3
J2
SDA
SCL
+3.3V
Q4
LM85
LM96000
J10
TP9
U2
FAN
POWER
Q6
GND
+5V or +12V
J3
GND
TP3
J1
Q5
Q7 GND
Q2
J12
TACH 4
FAN GND
FAN V+
TP11
FAN GND
J7
GND
TP7
TACH 2
J5
FAN GND
GND
TACH 1
FAN GND
FAN V+
GND
TACH 3
GND
Q1
TP6
FAN V+
J9
GND
TP8
TP1
FAN V+
USB Cable
U1
GND=Black, V+=Red, Tach = Other
3-terminal Fans
(Use 2 at a time)
Figure 2.1.2 Wiring Diagram showing Hookup of the LM85/LM96000 Evaluation Board
© Copyright 2004 National Semiconductor Corporation
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powers the LM85 or LM96000, the on-board
microcontroller, the EEPROM chip where the
board ID information is stored, and some of the
fan driver circuitry. The fan tachometer outputs,
all open-drain, are pulled up with resistor to the
Fan Power voltage and then voltage divided
down to acceptable voltage input levels for the
LM85 or the LM96000 “Tach” inputs.
3.0 Functional Description
The LM85/LM96000 Evaluation Board, along
with the SensorEval Software, provides the
system designer with a convenient way to learn
about the operation of the LM85 or the
LM96000 Temperature Sensor chip. The user
simply has to install the SensorEval software on
his PC, run it, connect the USB cable from the
PC to the Evaluation Board, and the user can
read temperatures, experiment with fan control,
and set limits all according to the latest
datasheet. It’s that simple! The user has to
provide the +5 or +12 VDC, depending on the
fan’s rated voltage, from an external power
supply, to the Fan Power input connector of the
evaluation board.
The external 3-terminal DC fans are either +5V
or +12 VDC brushless DC fans with a rated
current of 200 mA or less. Fans 1 and 2 are
controlled independently. Fan 3 and 4 are
driven by the same PWM3 signal from the
device.
The microcontroller provides the two-wire
SMBus communications to the LM85 or
LM96000. For all of the details of this
communication protocol see the latest LM85 or
LM96000 datasheet, available at
www.national.com.
Power to the LM85/LM96000 Evaluation Board
is taken from the USB 5-Volt line. This +5VDC
is the input to the on-board LM2950 low dropout
voltage regulator, which regulates the output
voltage to +3.3 VDC. This output voltage
3.1 LM85/LM96000 Evaluation Board Connection Table
See Appendix A for the description of all Connectors and Test Points, their function and requirements.
© Copyright 2004 National Semiconductor Corporation
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4.0 Software Installation and Operation
4.1 Installation
4.2 Operation
Follow the following procedure for operating the
LM85/LM96000 Evaluation Board using the SensorEval
software:
The CD provided in the LM85/LM96000 Evaluation
Board Kit contains the SensorEval software used to
make the LM85 or LM96000 Evaluation Board operate
with the user’s PC. It is assumed that the user will be
using a PC with a Pentium® III or higher processor and
Microsoft Windows® XP/2000/98/ME operating system.
1. Run the SensorEval program by either doubleclicking on the icon on the desktop or by
selecting Start, Run, and browse to find the
SensorEval.exe file.
2. Plug in the USB cable on both the PC and the
LM85/LM96000 Evaluation Board.
The software is installed as follows:
1.
2.
3.
Insert the SensorEval CD into the CD drive of
the PC. See details in the readme.txt file.
The software manual, provided on the CD, may
be useful to the user during this process.
The installation process will put an icon on the
PC desktop so that the SensorEval program will
run when the icon is double-clicked.
© Copyright 2004 National Semiconductor Corporation
10
Follow the register setup steps given in Section 2.0
Quick Start of this User’s Guide. Make sure that you are
following the given procedure for the specific evaluation
board you are working with.
Refer to the electrical schematic, layout and connector
diagrams for proper connections to external remote
thermal diodes.
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5.0 Electrical and Mechanical Specifications
5.1 Electrical Specifications
Power Requirements
The Board uses the +5.0 VDC and GND lines from the USB connection.
This +5.0 VDC voltage is regulated down to +3.3 VDC for board power.
+5.0 ± 0.1 V,
100 mA max.
+5.0 ± 0.1 V, or
Fan Power – External Power Supply set to +5 VDC or +12 VDC, whichever
+12.0 ± 0.1 V,
the fan voltage rating is. Each fan must be rated at 200 mA or less.
at 500 mA max
* USE ONLY 2 FANS AT A TIME – Either Fans 1 and 2 or Fans 3 and 4. *
5.2 Electrical Schematic
3.3V
Place one cap per each Vcc of U2
USB_VBUS
U1
LP2950CDT-3.3
1
IN
OUT
3.3V
TP1
GND
3
C1
0.1uF
Y1
C2
0.1uF
GND
C7
2.2uF
C6
0.1uF
C8
0.1uF
12 MHz
C9
33pF
R2
100k
5
R4
R3
1M
18
28
3.3V
1.5k
R5 22
24
25
3.3V
3.3V
+3.3V
SCL
C14
U3
AT24C02-10SI-2.7
1
2
3
4
A0 Vcc
WP
A1
A2 SCL
Vss SDA
8
7
6
5
0.1uF
R7
1.5k
R8
1.5k
SDA
GND
J2
HEADER 4x1
1
R6 22
22
23
2
38
3
12
4
4
SCL
SCL
SDA
41
37
DISCON#
RESET#
USBDUSBD+
RESERVED
RESERVED
7
PA4/FWR#
PA5/FRD#
PB0/T2
PB1/T2EX
PB2/RXD1
PB3/TXD1
PB4/INT4
PB5/INT5#
PB6/INT6
PB7/T2OUT
XCLK
CLKOUT
WAKEUP#
SCL
SDA
CTL0/AINFLAG
CTL2/AOUTFLAG
Gnd1
Gnd2
Gnd3
Gnd4
Gnd5
Gnd6
13
21
26
39
47
52
8
AGnd
SDA
2
3
AVcc
6
U2
XIN
C13
0.1uF
PC0/RxD0
PC1/TxD0
PC2/INT0#
PC3/INT1#
PC4/T0
PC5/T1
PC6/WR#
PC7/RD#
RDY2/AOE
10
11
29
30
31
32
33
34
35
36
43
44
45
46
48
49
50
51
VID0
VID1
TACH1
TACH2
TACH3
TACH4
PWM1
PWM2
PWM3
VID2
VID3
VID4
42
RESERVED
RESERVED
XCLKSEL
RESERVED
C12
0.1uF
17
15
16
9
C11
2.2uF
19
20
USBDUSBD+
RESERVED
RESERVED
1
2
3
4
5
6
Vcc1
Vcc2
Vcc3
Vcc4
VBUS
DD+
GND
SHELL_1
SHELL_2
33pF
1M
3.3V
1
14
27
40
J1
USB-B
C10
R1
L1
XOUT
C5
2.2uF
CY7C64613-52NC
Page 1 of 2 Pages of the Schematic of the LM85/LM96000 Evaluation Board
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C3
0.1uF
C4
0.1uF
5.2 Electrical Schematic (continued)
3.3V
D1
FAN_V
C15
D2
2.2uF
0.1uF
U4
4
1
2
HEADER 2x2
18
TACH2
REMOTE1+
PWM2
17
REMOTE1TACH3
4
16
C20
100 pF
2
FAN_V
VOLTAGE
2.5V 3
MONITORS
TACH1
VCCP 4
11
TACH1
24
PWM1
12
TACH2
10
PWM2
9
TACH3
REMOTE2+ PWM3/AE
13
PWM3
REMOTE2- TACH4/AS
14
FAN_V
12V 2
23
Q1
MMBT2222A/SOT
R16
10k
22
R18
2k
R20
13k
R21
10k
PWM1
PWM1
PWM2
J5
HEADER 3X1
1
2
3
TP6
GND
3.3Vb
R17
430
R19
2k
R22
2k
R24
13k
Q2
MMBT2222A/SOT
PWM2
FAN 2 TACH
FAN 2 V+
FAN 2 GND
1
2
3
J7
HEADER 3X1
FAN 3 TACH
FAN 3 V+
FAN 3 GND
1
2
3
J9
HEADER 3X1
PWM2
TP7
GND
R23
2k
FAN_T3
PWM3
TACH3
R25
10k
TP10
GND
TACH and PWM Signals
3.3Vb
R29
2k
Q6
MMBT3904/SOT
PWM3
R30
2k
R28 620
FAN_T4
R32
10k
Q7
MMBT2222A/SOT
R33 36
Page 2 of 2 Pages of the Schematic of the LM85/LM96000 Evaluation Board
12
TP8
GND
R27 36
PWM3
R31
13k
Q5
MMBT2222A/SOT
R26
620
TACH4
J11
HEADER 7x1
© Copyright 2004 National Semiconductor Corporation
FAN 1 TACH
FAN 1 V+
FAN 1 GND
TACH2
TACH4
3
TP9
GND
15
J6
HEADER 4x1
1
21
GND
1
5V
SMBCLK
J10
3
Q4
MMBT3904/SOT
PWM1/xT
J8
3
C19
100 pF
Q3
MMBT3904/SOT
TACH1
SMBDAT
R12
430
FAN_V
SCL
HEADER 2x2
Vccp
VID4
20
PWM3
2
2.5V
VID3
4
PWM2
1
SDA
12V
VID2
3.3Vb
R14
2k
FAN_T1
7
19
VID4
5V
VID1
TP3
GND
FAN V-
USB_VBUS
PWM1
8
VID3
3.3V
VID0
R13
2k
R15
13k
TACH4
7
VID2
TP4
GND
6
6
R35
2k
TACH3
5
VID1
R11
4.3k
FAN POWER
1 = + 12 VDC or +5 VDC
as required by the fan.
Pin 2 = GND
2
FAN_V
LM85/LM96000
VID0
R34
4.3k
5
TP5
GND
R10
1.5k
TACH2
VID4
0.1uF
4
VID3
5
C18
2.2uF
3
4
C17
2
VID2
FAN_V
VID1
3
TACH1
2
1
VID
SIGNALS
VID0
J3
HEADER 2X1
1
Pin
D1N4003
17V
J4
HEADER 5x1
1
FAN V+
C16
FAN_V
ZMM5247/DO213AA/17V
TP2
GND
3.3Vb
R9
0
www.national.com
FAN 4 TACH
FAN 4 V+
FAN 4 GND
J12
HEADER 3X1
1
2
TP11
3
GND
5.3 Evaluation Board Layout
Figure 5.3 Layout diagram of the LM85/LM96000 Evaluation Board
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5.4 Bill of Materials for LM85/LM96000 Evaluation Board
Item
1
Quantity
11
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
2
5
2
1
1
1
2
1
1
4
2
1
1
4
3
2
1
4
2
1
2
2
9
25
26
27
28
29
30
31
32
33
34
35
4
4
2
2
11
1
1
1
1
1
1
Reference
C1, C2, C3, C4, C6, C8, C12, C13, C14,
C16, C18
C9, C10
C5, C7, C11, C15, C17
C19, C20
D1
D2
J1
J2, J6
J3
J4
J5, J7, J9, J12
J8, J10
J11
L1
Q1, Q2, Q5, Q7
Q3, Q4, Q6
R1, R3
R2
R4, R7, R8, R10
R5, R6
R9
R11, R34
R12, R17
R13, R14, R18, R19, R22, R23, R29, R30,
R35
R15, R20, R24, R32
R16, R21, R25, R31
R26, R28
R27, R33
TP1 – TP11
U1
U2
U3
U4
Y1
--
© Copyright 2004 National Semiconductor Corporation
14
Part
Capacitor, Ceramic, 0.1 uF
Capacitor, ceramic, 33 pF
Capacitor, electrolytic, 2.2 uF
Capacitor, ceramic, 100 pF
Diode, Rectifier, 1N4003
Diode, Zener, 17V, ZMM5247/DO2113AA/17V
Connector, USB-B
Header, 1X4, 0.1 in centers
Header, 1X2, 0.1 in centers
Header, 1X5, 0.1 in centers
Header, 1X3, 0.1 in centers
Header, 2X2, 0.1 in centers
Header, 1X7, 0.1 in centers
Filter, 1uH, Stewart MI1206K900R-00
MMBT2222A/SOT Transistor, NPN
MMBT3904/SOT Transistor, NPN
Resistor, SMT, 1M, 0805
Resistor, SMT, 100k, 0805
Resistor, SMT, 1.5 k, 0805
Resistor, SMT, 22 Ohm, 0805
Resistor, SMT, 0 Ohm, 0805
Resistor, SMT, 4.3k, 0805
Resistor, SMT, 430 Ohm, 0805
Resistor, SMT, 2k, 0805
Resistor, SMT, 10k, 0805
Resistor, SMT, 13k, 0805
Resistor, SMT, 620 Ohm, 0805
Resistor, SMT, 36 Ohms, 0805
Test Point (Header, 1X1) for Ground
IC, Voltage Regulator, National LP2950CDT-3.3
IC, Microcontroller, Cypress CY7C64613-52NC
IC, EEPROM, Atmel AT24C02-10SI-2.7
LM85/LM96000CIMF Device Under Test (DUT)
Crystal, 12 MHz, Pletronics 2S1200G140
Circuit Board, Fabricated, LM85/LM96000
Evaluation Board, Rev. 1
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5.5 Mechanical Specifications
5.5.1 LM85/LM96000 Evaluation Board Basic Dimensions
0.175 in/0.445 cm
Drill Thru
#30 for 4-40
screw
clearance fit
(4 Places)
3.65 in/9.27 cm
0.175 in/0.445 cm
4.00 in/10.2 cm
2.75 in/6.99 cm
2.40 in/6.10 cm
5.5.3 Electrostatic Discharge (ESD) Precautions
The user shall use ESD precautions as specified in National Semiconductor ESD control document (SC)CSI-3-038
available through www.national.com.
© Copyright 2004 National Semiconductor Corporation
15
www.national.com
APPENDIX A
LM85/LM96000 Evaluation Board Connectors and Test Points
J1 USB-B Connector
PIN #
NAME
1
VBUS
2
USBD3
USBD+
4
GND
5, 6
Shell
DESCRIPTION
+5 VDC on USB Bus
USB Signal Input
USB Signal Input
System Ground
Connected to ground through a 1 Meg Resistor
J2 SMBus Test Connector – 1X4 Header
PIN #
NAME
DESCRIPTION
1
+3.3V
+3.3 VDC chip supply
2
SCL
Serial Clock signal on the SMBus
3
SDA
Serial Data signal on the SMBus
4
GND
System Ground
J3 Fan Power Connector – 1X2 Header
PIN #
NAME
DESCRIPTION
1
Fan V+
+5 or +12 VDC supply as required by the fans
2
Fan VReturn line for the Fan supply. Connected to system
ground.
J4 VID Signals Test Connector – 1X5 Header
PIN #
NAME
DESCRIPTION
1
VID0
Voltage ID signal 0
2
VID1
Voltage ID signal 1
3
VID2
Voltage ID signal 2
4
VID3
Voltage ID signal 3
5
VID4
Voltage ID signal 4
J5 Fan 1 Connector – 1X3 Header
PIN #
NAME
DESCRIPTION
1
Fan 1 Tach
For 3-terminal fans – Open collector tach out – usually
a yellow, green, or blue lead.
2
Fan 1 V+
+5 or +12VDC required fan voltage
– red lead
3
Fan 1 GND
Fan Voltage return – black lead
J6 Voltage Monitors Test Connector – 1X4 Header
PIN #
NAME
DESCRIPTION
1
5V
Connected to the USB +5V input for chip input.
2
12V
Connected to the Fan Power V+ input for chip input.
3
2.5V
Connected to a voltage divider for chip input.
4
VCCP
Connected to a voltage divider for chip input.
© Copyright 2004 National Semiconductor Corporation
16
www.national.com
APPENDIX A (Continued)
LM85/LM96000 Evaluation Board Connectors and Test Points
J7 Fan 2 Connector – 1X3 Header
PIN #
NAME
DESCRIPTION
1
Fan 2 Tach
For 3-terminal fans – Open collector tach out – usually
a yellow, green, or blue lead.
2
Fan 2 V+
+5 or +12VDC required fan voltage
– red lead
3
Fan 2 GND
Fan Voltage return – black lead
J8 Remote Temperature Diode Input 1 Connector – 2X2 Header
PIN #
NAME
DESCRIPTION
1
D1Connect to cathode of D1. Shunt 1 and 2 to connect Q3 cathode
to Remote 1-.
2
Remote 1DUT input from remote diode cathode.
3
D1+
Connect to anode of D1. Shunt 3 and 4 to connect Q3 anode to
Remote 1+.
4
Remote 1+
DUT input from remote diode anode.
J9 Fan 3 Connector – 1X3 Header
PIN #
NAME
DESCRIPTION
1
Fan 3 Tach
For 3-terminal fans – Open collector tach out – usually
a yellow, green, or blue lead.
2
Fan 3 V+
+5 or +12VDC required fan voltage
– red lead
3
Fan 3 GND
Fan Voltage return – black lead
J10 Remote Temperature Diode Input 2 Connector – 2X2 Header
PIN #
NAME
DESCRIPTION
1
D2Connect to cathode of D2. Shunt 1 and 2 to connect Q3 cathode
to Remote 2-.
2
Remote 1DUT input from remote diode cathode.
3
D2+
Connect to anode of D2. Shunt 3 and 4 to connect Q3 anode to
Remote 2+.
4
Remote 1+
DUT input from remote diode anode.
J11 Tach and PWM Test Connector – 1X4 Header
PIN #
NAME
DESCRIPTION
1
TACH1
Pulled up, and voltage-divided, Fan 1 tach output.
2
TACH2
Pulled up, and voltage-divided, Fan 2 tach output.
3
TACH3
Pulled up, and voltage-divided, Fan 3 tach output.
4
TACH4
Pulled up, and voltage-divided, Fan 4 tach output.
5
PWM1
Pulled up open-collector output of DUT to Fan 1 driver circuit.
6
PWM2
Pulled up open-collector output of DUT to Fan 2 driver circuit.
7
PWM3
Pulled up open-collector output of DUT to Fan 3 and Fan 4 driver circuit.
© Copyright 2004 National Semiconductor Corporation
17
www.national.com
APPENDIX A (Continued)
LM85/LM96000 Evaluation Board Connectors and Test Points
J12 Fan 4 Connector – 1X3 Header
PIN #
NAME
DESCRIPTION
1
Fan 4 Tach
For 3-terminal fans – Open collector tach out – usually
a yellow, green, or blue lead.
2
Fan 4 V+
+5 or +12VDC required fan voltage
– red lead
3
Fan 4 GND
Fan Voltage return – black lead
TP1 – TP11 Ground Connector – 1X1 Header
PIN #
NAME
DESCRIPTION
1
GND
System ground.
© Copyright 2004 National Semiconductor Corporation
18
www.national.com
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NATIONAL SEMICONDUCTOR'S END USER LICENSE AGREEMENT. DO NOT USE THIS PRODUCT UNTIL YOU
HAVE READ AND AGREED TO THE TERMS AND CONDITIONS OF THAT AGREEMENT. IF YOU DO NOT AGREE
WITH THEM, CONTACT THE VENDOR WITHIN TEN (10) DAYS OF RECEIPT FOR INSTRUCTIONS ON RETURN OF
THE UNUSED PRODUCT FOR A REFUND OF THE PURCHASE PRICE PAID, IF ANY.
The LM85/LM96000 Evaluation Boards are intended for product evaluation purposes only and are not
intended for resale to end consumers, are not authorized for such use and are not designed for
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or systems which, (a) are intended for
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reserves the right at any time without notice to change said circuitry and specifications.
© Copyright 2004 National Semiconductor Corporation
19
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