Axiom DEMO908LB8 User manual

DOC-0341-010, REV A
Axiom Manufacturing •2813 Industrial Lane •Garland, TX 75041
Email: [email protected] Web: http://www.axman.com
DEMO908LB8
Demonstration Board for Freescale 68HC908LB8

DEMO908LB8 MARCH 24, 2005
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CONTENTS
CAUTIONARY NOTES ..............................................................................................................4
TERMINOLOGY.........................................................................................................................4
FEATURES ................................................................................................................................5
REFERENCE .............................................................................................................................6
OPERATING MODES................................................................................................................6
RUN MODE ........................................................................................................................... 6
MON08 MODE ......................................................................................................................7
SOFTWARE DEVELOPMENT...................................................................................................7
MEMORY MAP ..........................................................................................................................8
DEVELOPMENT SUPPORT......................................................................................................8
MON08 HEADER .................................................................................................................. 8
DEBUG CONNECTOR.......................................................................................................... 9
MON08 SETUP .....................................................................................................................9
POWER....................................................................................................................................10
TERMINAL BLOCK ............................................................................................................. 10
J1 POWER INPUT .............................................................................................................. 11
PWR_SEL ........................................................................................................................... 11
RESET SWITCH ......................................................................................................................12
LOW VOLTAGE INHIBIT.........................................................................................................12
TIMING.....................................................................................................................................12
OPAMP_EN .............................................................................................................................13
USER OPTIONS ......................................................................................................................13
PUSHBUTTON SWITCHES............................................................................................ 14
LED INDICATORS .......................................................................................................... 14
RV1 POTENTIOMETER.................................................................................................. 14
RZ1 PHOTOCELL........................................................................................................... 14
I/O CONNECTOR J1................................................................................................................14
APPENDIX A............................................................................................................................16
BILL OF MATERIALS.......................................................................................................... 16

DEMO908LB8 MARCH 24, 2005
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FIGURES
Figure 1: Memory Map ...............................................................................................................8
Figure 2: MON08 Debug Port .....................................................................................................9
Figure 3: DEBUG Connector ......................................................................................................9
Figure 4: MON08 Setup............................................................................................................10
Figure 5: TB1 Terminal Block Connector..................................................................................11
Figure 6: PWR_SEL Jumper Settings.......................................................................................12
Figure 7: OSC_EN Option Header ...........................................................................................13
Figure 8: MCU IO Connector ....................................................................................................15
TABLES
Table 1: Run Mode Setup...........................................................................................................6
Table 2: MON08 Mode Setup .....................................................................................................7
Table 3: OPAMP_EN Option settings.......................................................................................13
Table 4: USER_EN Option Settings .........................................................................................13
REVISION
Date Rev Comments
March 24, 2005 A Initial Release

DEMO908LB8 MARCH 24, 2005
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CAUTIONARY NOTES
1) Electrostatic Discharge (ESD) prevention measures should be used when handling this
product. ESD damage is not a warranty repair item.
2) Axiom Manufacturing does not assume any liability arising out of the application or use of
any product or circuit described herein; neither does it convey any license under patent
rights or the rights of others.
3) EMC Information on the DEMO908LB8 board:
a) This product as shipped from the factory with associated power supplies and cables, has
been verified to meet with requirements the FCC as a CLASS A product.
b) This product is designed and intended for use as a development platform for hardware
or software in an educational or professional laboratory.
c) In a domestic environment, this product may cause radio interference in which case the
user may be required to take adequate prevention measures.
d) Attaching additional wiring to this product or modifying the products operation from the
factory default as shipped may effect its performance and cause interference with other
apparatus in the immediate vicinity. If such interference is detected, suitable mitigating
measures should be taken.
TERMINOLOGY
This development board uses option selection jumpers. A jumper is a plastic shunt that con-
nects 2 terminals electrically. Terminology for application of the option jumpers is as follows:
Jumper on, in, or installed - jumper is installed such that 2 pins are connected together.
Jumper off, out, or idle - jumper is installed on 1 pin only. It is recommended that jump-
ers be idled by installing on 1 pin so they will not be lost.

DEMO908LB8 MARCH 24, 2005
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FEATURES
The DEMO908LB8 is an evaluation or demonstration board for the Freescale 68HC908LB8
microcontroller. Application development is quick and easy with the included DB9 serial cable,
sample software tools, and examples. A MON08 port is provided for development tool
application support and is compatible with HC08 monitor interface cables and software.
Debug monitor access is also supported through the DEBUG Port. A 28-pin MCU I/O
connector (J1) allows interfacing the DEMO908LB8 board to an external development
environment or external test equipment.
Features:
•68HC908LB8 CPU
•20 PDIP, Socketed
•8K Byte Flash EEPROM
•128 Bytes Ram
•17 Shared General Purpose IO Lines, 1 Input only IO
•2-Ch Lamp Control Module
•2-Ch PWM
•7-Ch, 8-bit ATD
•Op Amp / Comparator
•7 Key Board Wake-up Ports
•8Mhz Internal Bus Operation
•Low Voltage RESET
•Regulated +5V power supply
•Power Input Selection Jumper
•Power input from TB1
•Optional power input from Connector J1
•Optional power output through Connector J1
•9.8304 MHz Clock Oscillator w/ Enable
•RS-232 Serial DEBUG Port w/ DB9 Connector for optional
monitor access
•User Components Provided
•3 Push Switches; 2 User, RESET
•3 LED Indicators; 2 User, +5V
•Option Jumpers
•Enable User Components
•Power Select
•OSC_EN
•MON_EN
•VTST_EN
•OPAMP_EN
•Connectors
•28-pin MCU I/O Connector, stack through type
•2-Position, Screw-type, Power Input Terminal Block
•MON08 Debug Cable Header
•DB9 Serial DEBUG Connector
•Supplied with DB9 Serial Cable, Documentation (CD), and Manual.
Specifications:
Board Size 1.6” x 2.2”
Power Input: +6V to +16V

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REFERENCE
Reference documents are provided on the support CD in Acrobat Reader format.
DEMO908LB8_SCH_B.pdf DEMO908LB8 Board Schematic Rev. B
DEMO908LB8_UG_A.pdf DEMO908LB8 User Manual (this document)
DEMO908LB8_QSG.pdf DEMO908LB8 Quick Start Guide
MC68HC908LB8.pdf 68HC908LB8 Device User Guide
See the HC08 Support CD provided with this board for all the documentation and support files
provided.
OPERATING MODES
The DEMO908LB8 board operates in two basic modes Run Mode, or MON08 Debug Mode.
Run Mode supports user application operation from Power-On or Reset. MON08 Debug Mode
supports the development and debug of applications via the embedded debug monitor. See
the related sections below for quickly starting the board in the desired operation mode.
The board has been preloaded with a demonstration program. The demo program operates in
the Run Mode. The +5V LED will light when power is applied to the board. See the
DEMO908LB8 Quick Start Guide provided with the demonstration board for details on running
the demonstration program.
RUN Mode
Run mode allows user application to function when power is applied to the board. Use the
following settings to configure the DEMO908LB8 board for RUN Mode to get started quickly.
1. Connect auxiliary equipment to board as required by application.
2. Configure the board option jumpers for run mode.
Table 1: Run Mode Setup
PWR_SEL 2 (pin3 – pin4)
OSC_EN As needed
VTST_EN OFF
MON_EN OFF
USER ALL ON – As needed
OPAMP_EN OFF
3. Apply power to terminal block TB1. Limit power input between +6V and +20V.
4. The loaded application will begin to execute.

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MON08 Mode
MON08 Debug Mode supports application development and debug using the internal HC08
monitor. MON08 mode is available to the user through an external MON08 debug cable con-
nected to the 16-pin MON08 header. Alternately, a Serial MON08 interface is provided
through the DEBUG 9-pin DSUB connector. The steps below describe using the external
MON08 debug cable connected to the 16-pin MON08 header.
1. Connect auxiliary equipment to board as required by application.
2. Install and launch P&E PKG08Z tool set, CodeWarrior Development Studio, or other soft-
ware capable of communicating with the HC08 MCU.
3. Configure the board option jumpers for MON08 mode.
Table 2: MON08 Mode Setup
PWR_SEL 2 (pin3 – pin4)
OSC_EN ON
VTST_EN ON
MON_EN OFF
USER User5 OFF – others ON
as needed
OPAMP_EN As Required
NOTE: The USER5 feature (POT) connects to a
monitor mode configuration line. To ensure proper
monitor mode entry, remove the USER5 jumper.
NOTE: To enter Monitor Mode, voltage applied at TB1 must exceed +9V.
4. Connect power to terminal block TB1. Apply voltage between +9V and +20V.
5. Hosting development software will establish MON08 communication.
SOFTWARE DEVELOPMENT
Software development will require the use of an HC08 assembler or compiler and a host PC
operating a MON08 debug interface. Supplied with this board is the CodeWarrior Develop-
ment Studio for HC(S)08 along with the Axiom MON08 IDE for Windows for Debugging and
Flash programming.
A powerful source code generation tool called DriveWay™ is also provided on the support CD.
This can generate C source code for the HC08 microcontroller peripherals, based on setup.
See the DriveWay™readme.txt file for more information.

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MEMORY MAP
Figure 1: Memory Map
0x0000
0x0058 IO Registers 59 bytes
Unimplemented
0x0080
0x00FF RAM 128 bytes
Unimplemented
0X037E
0X061F
Flash Programming
Routine ROM 674 bytes
Unimplemented
0xDE00
0xFDFF Flash Memory 8192 bytes
0xFE00
0xFE0C Status & Control 12 bytes
Unimplemented
0xFE20
0xFF7D Monitor ROM 350 bytes
0xFF7E Flash Block Protect 1 byte
Unimplemented
0xFFC0 Internal Osc Trim 1 byte
Unimplemented
0xFFDE
0xFFFF Vectors 34 bytes
NOTE: Attempts to execute code from an unimplemented address
range will cause an illegal address RESET
NOTE: $FFF6 – $FFFD used for 8 security bytes
DEVELOPMENT SUPPORT
Application development and debug for the target MC68HC908LB8 is supported through the
MON08 debug interface. Monitor-mode access is available through the MON08 header and
through the DEBUG connector. The VTST_EN option jumper is used to force monitor mode
entry. This jumper must be installed as the MCU exits RESET to force monitor mode entry.
MON08 Header
A MON08 debug cable will attach to the 16-pin MON08 port. Several MON08 debug cables
supply VTST directly, thereby, eliminating the need to set the VTST_EN option jumper. The
MCU supports monitor mode communications at 9600 bps. Refer to MC68HC908LB8
documentation for further details.

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Figure 2: MON08 Debug Port
1 2 GND
3 4 PTA3/RST*
5 6 PTA2/IRQ*
See the HC08 Reference Manual for complete
MON08 documentation
7 8 PTA0
910 PTA4
11 12 PTA1
PTA5/OSC1 13 14
VDD 15 16
DEBUG Connector
Serial MON08 access is provided through a standard 9-pin DSUB connector. An RS-232
translator provides RS-232 logic level to TTL/CMOS logic level translation on the DEBUG port.
The figure below shows the DB9 connector pin-out. The VTST_EN jumper must be installed
as the MCU exits RESET to invoke monitor mode. The MON_EN option jumper enables serial
MON08 access. The MCU supports monitor mode communications at 9600 bps. Refer to
MC68HC908LB8 documentation for further details.
Figure 3: DEBUG Connector
16
TXD 27RTS
RXD 38CTS
49NC
GND 5
Female DB9 connector that interfaces to the HC08 internal SCI1 serial
port via the U2 RS232 transceiver. It provides simple 2 wire asynchro-
nous serial communications without flow control.
Pins 1, 4, and 6 are connected together for NULL status to the host
Pins 7, 8 are connected together for flow control if needed
MON08 Setup
The following figure shows the settings necessary to configure monitor mode operation. To
ensure seamless monitor mode entry, the user should remove the USER5 jumper as shown
below. The USER5 jumper enables the POT, which connects to monitor mode configuration
line PTA1. Failure to remove this jumper may prevent monitor mode entry.
Configure MON_EN jumper for the monitor mode access desired.

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Figure 4: MON08 Setup
MON_EN ON/OFF Enables MON08 communication through DEBUG connector. On
for serial access via DEBUG connector off for MON08 cable ac-
cess
VTST_EN ON Force MON08 Monitor Mode. Remove if using a powered MON08
debug cable.
OSC_EN ON/OFF Enable/Disable External Clock Oscillator if required
User-5 ••OFFDisable User-5 Function. May not enter monitor mode if not re-
moved.
NOTE: To enter the MON08 monitor mode, the input voltage must exceed +9V
NOTE: User-5 must be disabled to allow monitor mode entry
NOTE: Remove VTST_EN jumper if using a powered MON08 debug cable.
When using the MON08 cable to access monitor mode, the host software must be configured
properly. Many MON08 cables are capable to powering the target board through the MON08
header. In this case, the appropriate voltages will be applied to the board and the state of the
monitor configuration jumpers is DON’T CARE. If the board is not powered through the
MON08 Port, then the minimum voltage applied to the board is +9V and the VTST_EN jumper
must be installed. Regardless of how the board is powered, the state of the MON_EN jumper
is DON’T CARE when using a MON08 cable.
POWER
Input power may be applied by external connection to a 2 position terminal block or directly to
connector J1. The PWR_SEL option header determines the selected power input.
Terminal Block
The TB1 terminal block allows external voltage to be supplied to the board. For normal opera-
tion, input voltage should be limited to the range of +6V and +20V. The terminal block is a
3.55mm, screw-type, connector that accepts a maximum 18 AWG wire. An on-board voltage
regulator converts the input voltage to the +5V used by the board. Bulk capacitance on the
regulator input and output provides noise immunity and reduces ripple.
A large plus sign (+) adjacent to the terminal block input indicates the positive terminal. Use
care when connecting power to the terminal block. Reversing the power connections at TB1
may damage the board.

DEMO908LB8 MARCH 24, 2005
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Figure 5: TB1 Terminal Block Connector
J1 Power Input
Positions J1-1 and J1-3 connect to the power rails on the board. The PWR_SEL jumper en-
ables the connection between the +5V power rail and J1-1. This connection allows the board
to either source power through connector J1 or supply power to external circuitry through con-
nector J1.
Input voltage applied to the board at connector J1 must be regulated +5V, ±5%. Exercise cau-
tion when using this feature. This input provides no over-current or over-voltage protection.
The board may be damaged if over-driven.
When used to power external circuitry, connector J1 supplies voltage directly from the on-
board voltage regulator. This output provides a regulated +5V, ±5% output to connector J1.
The current limit of the regulator must be considered when using this feature.
PWR_SEL
Power routing on the DEMO908LB8 is determined by the PWR_SEL option header. The
PWR_SEL header is also be used to configure the board to supply voltage to off-board cir-
cuitry. The figure below details the different configuration options available to the user.
CAUTION: Board damage may occur if the connector J1 power input pins (J1-1,
J1-3) are over-driven.
The PWR_SEL option jumper supports 3 possible configurations; source power from TB1,
source power from J1, or source power from TB1 and supply power to J1.
+6V -
+20V
GND 2 Position, Screw-
Type Terminal Block
MCU_PORT
J1 +

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Figure 6: PWR_SEL Jumper Settings
1 • •
2 • •
Board powered from external input connected to J1-1 (+) and
J1-3 (-). +5V Maximum input voltage.
1 • •
2 • •
Board powered from external input connected to TB1 Terminal
Block. J1-1 is open or not connected.
1 • •
2 • •
Board powered from external input connected to TB1 Terminal
Block. Board provides +5V output at pin J1 for use by external
circuits.
NOTE: Power output from the board is limited by the 250 mA maximum output
of the on-board voltage regulator.
NOTE: External circuit connected to J1 should limit current flow to less than
50 mA to prevent current-limiting the power supply (VR1).
RESET SWITCH
The RESET switch provides a method to apply an asynchronous RESET to the MCU and is
connected directly to the RST* input pin. Pressing the switch asserts RESET forcing the MCU
into a start-up condition. A pull-up bias resistor on the RST* input allows normal MCU opera-
tion. Shunt capacitance ensures an adequate input pulse width.
LOW VOLTAGE INHIBIT
The MC68HC908LB8 applies an internal Low Voltage Inhibit (LVI) protect against under-
voltage conditions. The LVI is enabled out of RESET. Consult the MC68HC908LB8 reference
manual for details on configuring LVI operation.
TIMING
The MCU provides an internal 16MHz timing source out of RESET. By default, the internal
timing source exhibits a 25% tolerance. The OSCTRIM register allows trimming the internal
timing source to ±5% of nominal. The default frequency supports an internal bus frequency of
4MHz. The user must configure the MCU to use the external clock input by writing the CON-
FIG2 configuration register. The MCU may be configured to output the internal oscillator fre-
quency on the OSC2 pin. See MCU datasheet for configuration details.
A 9.8304 MHz clock oscillator at X1 provides alternate timing to the DEMO908LB8. The clock
oscillator exhibits a 100-ppm frequency tolerance. The external clock oscillator produces a
2.46 MHz internal operating frequency. An option jumper at OSC_EN allows the user to en-
able or disable the external clock oscillator input.

DEMO908LB8 MARCH 24, 2005
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Bus operating frequency is one-fourth (¼) the selected timing source. The figure below shows
the different option settings.
Figure 7: OSC_EN Option Header
ON Enables 9.8304 MHz Input to MCU on OSC1
12OFFDisables 9.8304 MHz Input to MCU on OSC1
OPAMP_EN
The OPAMP_EN option header connects a photocell to the OP AMP/Comparator input on the
MCU. This option header also enables the feedback loop on the op amp. The table below de-
scribes the setup for the OPAMP_EN option header. Refer to the MC68HC908LB8 manual for
details on the operation of the OP AMP/Comparator. The table below shows the OPAMP_EN
option header.
Table 3: OPAMP_EN Option settings
Jumper ON OFF MCU PORT
OPAMP_EN-1 Enable RZ1 Disable RZ1 PTB5 (U1-11)
OPAMP_EN-2 Enable Feedback Disable Feedback PTB6 (U1012)
USER OPTIONS
The DEMO908LB8 provides 2 push-button switches, 2 LED indicators, a potentiometer, and a
photocell circuit for use in application development. The photocell is connected to a gain stage
amplifier internal to the MCU. The USER_EN option header allows each option to be enabled
or disabled individually. To enable a user option, simply install the appropriate jumper. Re-
move the jumper to disable an option. The table below which jumper controls each user func-
tion. The table also shows the signal assigned to each user function.
NOTE: To enter monitor mode, jumper USER-5 must be removed. Otherwise,
attempts to enter monitor mode will fail.
Table 4: USER_EN Option Settings
Jumper On Off MCU PORT
User-1 Enable SW1 Disable SW1 PTB3 (U1-9)
User-2 Enable SW2 Disable SW2 PTB4 (U1-10)
User-3 Enable LED1 Disable LED1 PTA2 (U1-16)
User-4 Enable LED2 Disable LED2 PTA3 (U1-17)
User-5 Enable POT Disable POT PTA1 (U1-15)
OPAMP_EN - 1 Enable SENSOR Disable SENSOR PTB5 (U1-11)
OPAMP_EN - 2 Enable Feedback Disable Feedback PTB6 (U1-12)
NOTE: User-5 must be disabled when attempting monitor mode entry.

DEMO908LB8 MARCH 24, 2005
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Pushbutton Switches
Two push button switches provide momentary, active low input for use in application develop-
ment. Both switches are pulled-up external to the MCU. SW1 and SW2 are enabled to the
HC08 I/O ports by the USER option bank. SW1 and SW2 provide input to HC08 I/O ports
PTB3 and PTB4 respectively.
LED Indicators
Two LED indicators provide visual output indication for use in application development. Both
LED’s are active low and will light when a logic low (0V) is driven from the respective MCU
port. Each LED is individually enabled by the USER option bank. MCU ports PTA2 and PTA3
drive LED1 and LED2 respectively.
RV1 Potentiometer
A 5k Ω, thumb-wheel potentiometer at RV1 provides variable resistance input for use in
application development. The device provides a 0 to VDD (+5V typical) output to the PTA1
MCU input when enabled. The POT is enabled by the USER option bank. The POT is
connected to the HC08 I/O port PT1.
RZ1 Photocell
A visible-light sensitive photocell (RZ1) is connected to the internal OP AMP/Comparator at
PTB5. PTB7/Vout and PTB6/V- provide the feedback circuit used to control the OP AMP gain.
Sensor output voltage ranges between .5V to VDD typical and is inversely proportional to
incident light intensity (VDD = Dark).
I/O CONNECTOR J1
Connector J1 is a 28-pin, surface-mount, socket header mounted on the bottom of the board.
The connector is mounted over plated-through holes in the PCB. This socket is a pass-
through type socket designed to allow header insertion from either the top or bottom. This
connector provides maximum flexibility allowing the board to connect directly to an expanded
development environment or to test equipment. Access to all MCU signals is available at con-
nector J1. The figure below details the pin-out for connector J1.

DEMO908LB8 MARCH 24, 2005
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Figure 8: MCU IO Connector
VX1 2 PTC2/SHTDWN/IRQ*
GND 3 4 PTA5/RST*/BKI5
PTA0/ADC0/KBI0 5 6 PTC0/OSC1
PTA1/ADC1/KBI1 7 8 PTC1/OSC2
PTA2/ADC2/KBI2 910 PB2/FAULT
PTA3/ADC3/KBI3 11 12 PTB5/V+
PTB3/PWM0 13 14 PTB56/V-
PTB4/PWM1 15 16 PTB7/VOUT/ADC6/FAULT
PTB0/TOP 17 18 PTA4/ADC4/KBI4
PTB1/BOT 19 20 PTA6/ADC5/TCH0/KBI6
21 22
23 24
25 26
27 28
NOTE: Power output from the board is limited by the 250 mA maximum output of
the on-board voltage regulator.

DEMO908LB8 MARCH 24, 2005
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APPENDIX A
BILL OF MATERIALS
Item Qty Title Ref(m) Mfr Mfr-P/N
1 3 Cap, Tant, 10uF, 10V, SMB C5, C13, C15 Avx TAJB106K010R
2 5 Cap, Mon, 1uF, 16V, 0805 C8, C8, C9, C18, C20
3 7 Cap, Mon, .1uF, 50V, 0805 C1, C2, C3, C10, C12, C14, C16 Meritek MA080525U104M500
4 2 Cap, Mon, .01uF, 50V, 0805 C7, C19
5 1 Cap, Cer, 39pF, 50V, 0805 C4 Yageo 0805CG390J9B200
6 2 Res, Carbon, 47K ohm, 5%, 0805 R1, R9
7 4 Res, Carbon, 1K ohm, 5%, 1/16W, 0805 R2, R3, R7, R13
8 4 Res, Carbon, 100Kohm, 5%, 1/16w, 0805 R4, R8, R10, R11
9 3 Res, Carbon, 10K ohm, 5%, 0805 R5, R6, R14
10 1 Res, Carbon, 100 ohms, 55, 1/16W, 0805 R12
11 1 Ind, Ferrite, EMI, 330 ohm @ 100 MHz, 1.5A,
0805
FB1 Murata BLM21P331SG
12 1 Clock Osc., 9.8304Mhz, SMT 5x7mm, 5V X1 Epson
13 1 Res, Variable, 5K ohm, 3/8 horz adj. W/ knob RV1 Bourns
14 1 Photocell, 30K -1M RZ1 Photonic PDV-P9003
15 1 Diode, Zener, 8.2V, 5%, 225mW, SOT23 D1 On Semiconductor MMBZ5237BLT1
16 1 Diode, Schottky, 30V, 200mA, BAT54C, Com.
Cathode, SOT23
D2 General Sem.
17 3 LED, Green, w/reflector, 1206, SMT LED1, LED2, +5V Rohm SML-010MTT86
18 1 VReg, LDO, 5V, 250mA, 8 SOIC VR1 STMicroelectronics L4931CD50
19 1 IC, MCU, MC68HC908LB8, 20 DIP U1 Freescale MC68HC908LB8CP
20 1 IC, Dual RS232 XCVR, 3.3V, ESD, 16SOIC U3 Intersil ICL3232ECBN
21 1 IC, Quad Buffer, 74ACT125, 14SOIC U4
22 3 Sw, PB, 5mm Sq, Thru SW1, SW2, RESET E-Switch EG1827
23 1 Conn, 2x14 Socket Hdr, Pass Thru, .1", Bottom
Entry, SMT
J1 Samtec SSM-114-L-DV-K-BE-A
24 1 Conn, Term Blk, 2Pos, 3.55mm, thru TB1 On Shore Technology ED555/2DS
25 1 Conn, Dsub, 9P, F, RA, PCB Mount DEBUG
26 3 Conn, 1x2, Pin Header, .1" Ctr, Thru VTST_EN, MON_EN, OSC_EN
27 2 Conn, 2x2 Pin Header, .1" Ctr, Thru PWR_SEL, OPAMP_EN
28 1 Conn, 2x5 Pin Header, .1" Ctr, Thru USER_EN

DEMO908LB8 MARCH 24, 2005
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29 1 Conn, 2x8 Pin Header, .1" Ctr, Thru MON08
30 1 Socket, IC, 20 DIP, MP SU1
31 12 Hdw, Shunt, 2 Pos, .1" Generic
32 2 Hdw, Stand-off, .250x.375, Hex, Alum Keystone 2202
33 2 Hdw, Screw, 4-40x3/8, 18-8, SS
34 1 PCB, DEMO908LB8, 2 layer, 1.6 x 2.2