NXP Semiconductors EVB912UF32 User manual

924-75300
Rev 1
April 8, 2004
User’s Manual
© Motorola, Inc., 2004
EVB912UF32
Evaluation Board
User’s Manual

EVB912UF32 Evaluation Board - Rev 1 User’s Manual
2MOTOROLA
Important Notice to Users
While every effort has been made to ensure the accuracy of all information in
this document, Motorola assumes no liability to any party for any loss or
damage caused by errors or omissions or by statements of any kind in this
document, itsupdates, supplements, orspecial editions, whether such errors are
omissions or statements resulting from negligence, accident, or any other cause.
Motorolafurtherassumesno liability arisingout of the applicationor use of any
information, product, or system described herein: nor anyliability for incidental
or consequential damages arising from the use of this document. Motorola
disclaims all warranties regarding the information contained herein, whether
expressed, implied, or statutory, including implied warranties of
merchantability or fitness for a particular purpose. Motorola makes no
representation that the interconnection of products in the manner described
herein will not infringe on existing or future patent rights, nor do the
descriptions contained herein imply the granting or license to make, use or sell
equipment constructed in accordance with this description.
Trademarks
This document includes these trademarks:
Motorola and the Motorola logo are registered trademarks
of Motorola, Inc.
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and other countries.
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Motorola, Inc., is an Equal Opportunity / Affirmative Action Employer.
© Motorola, Inc., 2004, All Rights Reserved

User’s Manual EVB912UF32 Evaluation Board - Rev 1
MOTOROLA 1
Table of Contents
Section 1 General Information
1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.3 System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.4 EVB912UF32 Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.5 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Section 2 Configuration and Operation
2.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Board Configuration Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.1 Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2.2 Mode Jumpers (W13, W16, and W18) . . . . . . . . . . . . . . . . . . . . . . 7
2.2.3 Configuration Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.1 Functional Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.3.2 Memory Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3.3 USB Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.4 Using The Board Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5 Using the Memory Cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Section 3 Support Information
3.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 Top CompactFlash Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.3 ATA Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.4 Secure Digital Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.5 SmartMedia Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.6 Memory Stick Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

EVB912UF32 Evaluation Board - Rev 1 User’s Manual
2MOTOROLA
3.7 Background Debug Header. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3.8 UART Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.9 USB Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
3.10 Breakout Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Section 4 Troubleshooting
4.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2 Common Issues. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2.1 System +5V PWR LED is not lit. . . . . . . . . . . . . . . . . . . . . . . . . . 33
4.2.2 BDM communications are not working. . . . . . . . . . . . . . . . . . . . . 33
4.2.3 The ATA is non-functional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
4.2.4 Top CompactFlash J11 is non-functional . . . . . . . . . . . . . . . . . . . 34
4.2.5 Bottom CompactFlash J13 is non-functional. . . . . . . . . . . . . . . . . 34
4.2.6 The SD/MMC, Memory Stick, or SmartMedia is non-functional. 35
4.2.7 The USB 2.0 Interface is non-functional . . . . . . . . . . . . . . . . . . . . 35
4.2.8 The RS-232 Communication is non-function . . . . . . . . . . . . . . . . 35

User’s Manual EVB912UF32 Evaluation Board - Rev 1
MOTOROLA 1
List of Tables
1-1 Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2-1 Switches. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2-2 Boot Mode Jumper Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2-3 Configuration Jumper Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2-4 EVB912UF32 Connectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3-1 CompactFlash Connector J11 & J13 Signal Descriptions. . . . . . . . . 18
3-2 ATA Connector J2 Signal Descriptions. . . . . . . . . . . . . . . . . . . . . . . 20
3-3 Secure Digital Connector J17 Signal Descriptions . . . . . . . . . . . . . . 22
3-4 SmartMedia Connector J7 Signal Descriptions. . . . . . . . . . . . . . . . . 23
3-5 Memory Stick Connector J19 Signal Descriptions. . . . . . . . . . . . . . . 25
3-6 J3 Background Debug Header Signal Descriptions . . . . . . . . . . . . . . 25
3-7 Connector J31 Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3-8 USB Connector J5 Signal Descriptions. . . . . . . . . . . . . . . . . . . . . . . 27
3-9 J4 Breakout Header Signal Descriptions. . . . . . . . . . . . . . . . . . . . . . 28
3-10 J9 Breakout Header Signal Descriptions . . . . . . . . . . . . . . . . . . . . . . 29
3-11 J10 Breakout Header Signal Descriptions. . . . . . . . . . . . . . . . . . . . . 30
3-12 J12 Breakout Header Signal Descriptions. . . . . . . . . . . . . . . . . . . . . 31
3-13 J16 Breakout Header Signal Descriptions. . . . . . . . . . . . . . . . . . . . . 32

EVB912UF32 Evaluation Board - Rev 1 User’s Manual
2MOTOROLA

User’s Manual EVB912UF32 Evaluation Board - Rev 1
MOTOROLA 1
List of Figures
1-1 EVB912UF32 Board Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2-1 Functional Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3-1 Top CompactFlash Connector J11 Pin Assignments. . . . . . . . . . . . . 16
3-2 Bottom CompactFlash Connector J13 Pin Assignments. . . . . . . . . . 17
3-3 ATA Connector J2 Pin Assignments. . . . . . . . . . . . . . . . . . . . . . . . . 20
3-4 Secure Digital Connector J17 Pin Assignments . . . . . . . . . . . . . . . . 22
3-5 SmartMedia Connector J7 Pin Assignments . . . . . . . . . . . . . . . . . . . 23
3-6 Memory Stick Connector J19 Pin Assignments . . . . . . . . . . . . . . . . 24
3-7 J3 Background Debug Header Pin Assignments . . . . . . . . . . . . . . . . 25
3-9 USB Connector J5 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . 27
3-10 J4 Breakout Header Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 28
3-11 J9 Breakout Header Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . 29
3-12 J10 Breakout Header Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 30
3-13 J12 Breakout Header Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 31
3-14 J16 Breakout Header Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . 32

EVB912UF32 Evaluation Board - Rev 1 User’s Manual
2MOTOROLA

General Information
Description
User’s Manual EVB912UF32 Evaluation Board Rev 1
MOTOROLA General Information 3
1.1 Description
This user’s manual explains how to connect and operate the Motorola
EVB912UF32 Evaluation Board (EVB).
This board is a development tool which allows the user to run software
applications for MC9S12UF32 microcontroller unit (MCU).
The EVB912UF32includesconnectors for CompactFlash, SmartMedia, Secure
Digital/Multimedia, and Memory Stick cards as well as a standard 40 pin ATA
interface. The system also features a USB 2.0 interface. The board has several
20-pin headers that are connected to most of the processors signals. These
provide convenient points to observe these signals or connection points for
external user designed circuit boards.
1.2 Features
The EVB912UF32 features include:
• MC9S12UF32 MCU
• 12 MHZ crystal with an option to use an externally generated clock
connected to the on board BNC, J1, or a user provided crystal oscillator
plugged into the socket for Y2
• Voltage regulator with an ON/OFF switch and a fused input that steps
down a nominal 12.0-volt input from an external power supply to 5 volt
power
• Two TypeII CompactFlash connectors with softwareselectable 5 volt or
3.3 volt power
• Secure Digital/MultiMediaCard connector (SD/MMC)
• SmartMedia connector
User’s Manual — EVB912UF32
Section 1 General Information

EVB912UF32 Evaluation Board - Rev 1 User’s Manual
4 General Information MOTOROLA
General Information
• Memory Stick connector
• ATA Interface connector
• One UART port with RS232 transceiver and DB9 connector
•Background Debug Mode (BDM) connector
• USB 2.0 interface and series B USB connector
• Break out headers for all processor control signals
• Power On Reset and a push button reset functions
• Input power and CompactFlash card power status LEDs
• Four user definable LEDs that can be disconnected from their control
signals
• Universal power supply with 12.0-volt output @1200ma
• PC compatible USB 2.0 cable
• A Multilink BDM w/ USB interface connection
• Metrowerks CodeWarriorIDE software (evaluation copy)
1.3 System Requirements
To use an EVB912UF32 Application Development System, you need:
• An IBM PC or compatible computer that has:
–a Windows98, Windows ME, Windows XP, Windows 2000,
or Windows NT(version 4.0) operating system.
–A Multilink BDM module or compatible device
•A+9 to +15 volt power supply, at 500mA, with a 2 mm female (inside
positive) power connector (included).
CAUTION: Neversupply more than +15-volts power to your EVB912UF32. Doingsocould
damage board components.

General Information
EVB912UF32 Layout
User’s Manual EVB912UF32 Evaluation Board Rev 1
MOTOROLA General Information 5
1.4 EVB912UF32 Layout
Figure 1-1 shows the layout of the EVB912UF32. This may be useful in
locating configuration jumpers and connectors. Note that a second
CompactFlash connector, J13, is located on the opposite side of the board.
Figure 1-1 EVB912UF32 Board Layout
Important board components are:
• U1 — MC9S12UF32 MCU
• J1 — External Clock connector
• J2 — ATA Interface connector
• J3 — BDM connector
• J4, J9, J10, J12, J16 — Signal break out headers
F1
S1
S2
FLASH POWER
RE11198B Rev
EVB912UF32
LED4
ON
OFF
RESET
Secure Digital J17
W11 W13
U5
1.5A
J2 ATA
Y2
J16
W19
W1
J9
J10
W5
J8
BDM
W7
LED3
W8
LED2
W9
LED0
W10
+12V IN
SMART MEDIA J7
W17W15W14
MODC
W18
MODB
W16
MODA
VREGEN
GND
J23
+5V
J21
3.3V
DS2
5V
DS1
COMPACT
MEMORY STICK
J19
GND
J15
J12
J6
W2
W3 W4
W6
+3.3V
J18
+12V
J22
+5V PWR
DS7
COMPACT FLASH
J5 USB J1 EXT
CLK
DS3 DS5 DS6DS4
J11
J20
CompactFlash
BOTTOM SIDE
J13
J3 J4
J31 DCE

EVB912UF32 Evaluation Board - Rev 1 User’s Manual
6 General Information MOTOROLA
General Information
• J5 — USB connector (type B)
• J7 —SmartMedia connector
• J11, J13 — CompactFlash connectors
• J17 — SD/MMC connector
• J19 — Memory Stick connector
• J31 — RS232 serial interface connector
• S1 — Power switch
• S2 — Reset switch
• DS1 — +5 volt to CF/ATA connectors LED (red)
• DS2 — +3.3 volt to CF/ATA connectors LED (green)
• DS3, DS4, DS5, and DS6 — User definable status LEDs (amber)
• DS7 — +5 volt power ON LED (green)
1.5 Specifications
Table 1-1 lists EVB912UF32 specifications.
Table 1-1 Specifications
Characteristic Specifications
Clock speed 12 MegaHertz
Ports USB 2.0, RS-232 serial
Temperature
operating
storage
-10° to +50° C
-40° to +85° C
Relative humidity 0 to 90% (noncondensing)
Power requirements 9.0V —15.0 VDC at .5 A
Dimensions 5.5 x 6.5 inches (14 x 16.6centimeters)

User’s Manual EVB912UF32 Evaluation Board Rev 1
MOTOROLA Configuration and Operation 7
User’s Manual — EVB912UF32
Section 2 Configuration and Operation
2.1 Introduction
This section consists ofconfiguration information,connection descriptions, and
other operational information that may beusefulin your development activities.
2.2 Board Configuration Components
2.2.1 Switches
Table 2-1 is a summary of the switches of the EVB912UF32.
2.2.2 Mode Jumpers (W13, W16, and W18)
Jumpers W13, W16, and W18 allow the user to configure the boot mode. The
selection takes effect only on power up or after a reset is applied.
Table 2-1 Switches
Component Position Effect
System Power
Switch, S1 Move this switch to the ON position to enable the power source connected to J20 to power the system.
Factory setting is OFF.
System ResetSwitch,
S2 Push to reset the MC9S12UF32.
ON
OFF
S1
S2

EVB912UF32 Evaluation Board- Rev 1 User’s Manual
8 Configuration and Operation MOTOROLA
Configuration and Operation
Table 2-2 lists settings for the boot-mode jumpers. Place the jumper between
pins 1 and 2 to select a HI (logic 1) and between pins 2and 3 to select a LOW
(logic zero).
.
2.2.3 Configuration Jumper Settings
Table 2-3 lists the functions controlled by the rest of the jumpers on the board.
Table 2-2 Boot Mode Jumper Settings
Boot Mode W13 MODC W18 MODB W16 MODA
Special Single Chip LOW LOW LOW
Emulation Expanded Narrow LOW LOW HI
Special Test (Expanded Wide) LOW HI LOW
Emulation Expanded Wide LOW HI HI
Normal Single Chip (Factory setting) HI LOW LOW
Normal Expanded Narrow HI LOW HI
Special Peripheral HI HI LOW
Normal Expanded Wide HI HI HI
Table 2-3 Configuration Jumper Settings
Function/RefDes Setting/ pins Effect
CLK / W1 XTAL 1-2* Selects crystal operation
OSC 2-3 Selects Y2 oscillator or an external
oscillator through J1
TERM / W2 JUMPR IN* Connects a 49 ohm termination to
the external clock line
JUMPR OUT 49 ohm termination is not connected
RST / W3 RST_B 1-2 Connects an active LOW reset to the
CompactFlash reset, CF_RES
RST 2-3* Connects an active HI reset to the
CompactFlash reset, CF_RES
CSEL / W4 HI 1-2 CSEL is connected to VDDX
LOW 2-3* CSEL is connected to Ground
RXD / W5 JUMPR IN* CF_A5 controls RS232 Received
Data.
JUMPR OUT CF_A5 is disconnected from RS232
Received Data.
TXD / W6 JUMPR IN* Connects RS232 Transmitted Data to
CF_A6.

Configuration and Operation
Operation
User’s Manual EVB912UF32 Evaluation Board - Rev 1
MOTOROLA Configuration and Operation 9
* These are the factory settings.
2.3 Operation
This section contains designed to help the user understand how to use the board
and how the system functions.
2.3.1 Functional Block Diagram
Figure 2-1 is a block diagram of the EVB912UF32 system. Please note that not
all interface signalsare called out. The signalsendingwith"x" represent agroup
of signals that begin with the same letter(s) that proceed the "x".
JUMPR OUT CF_A6 is disconnected from RS232
Transmitted Data.
EN3 / W7 JUMPR IN* Enables LED3 (DS3) to be controlled
by PT3
JUMPR OUT Disconnects LED3 (DS3) from PT3
EN2 / W8 JUMPR IN* Enables LED2 (DS4) to be controlled
by PT2
JUMPR OUT Disconnects LED2 (DS4) from PT2
EN1 / W9 JUMPR IN* Enables LED1 (DS5) to be controlled
by PT1
JUMPR OUT Disconnects LED1 (DS5) from PT1
EN0 / W10 JUMPR IN* Enables LED0 (DS6) to be controlled
by PT0
JUMPR OUT Disconnects LED0 (DS6) from PT0
VREGEN / W11 ENBL 1-2* Enables internal voltage regulators.
DISBL 2-3 Disables internal voltage regulators.
DSR- DTR/ W14 JUMPR IN* Connects DSR to DTR at J31
JUMPR OUT DSR and DTR are not connected
RST - CTS/ W15 JUMPR IN* Connect RST to CTS at J31
JUMPR OUT RST and CTS are not connected
DCD- DTR/ W17 JUMPR IN* Connect DCD to DTR at J31
JUMPR OUT DCD and DTR are not connected
VDD3X SEL/ W19 P3_3V 1-2* 3.3V power connects to VDD3X
VDDX 2-3 VDDX power connects to VDD3X
Table 2-3 Configuration Jumper Settings
Function/RefDes Setting/ pins Effect

EVB912UF32 Evaluation Board- Rev 1 User’s Manual
10 Configuration and Operation MOTOROLA
Configuration and Operation
Figure 2-1 Functional Block Diagram
2.3.2 Memory Map
The EVB912UF32 does not have an external memory bus. All system
peripherals are internal to the microprocessor. Please refer to the specification
for the MC9S12UF32 to get memory map information.
USB
2.0
BDM
Reset
Clock
OSC
External
Clock
MOD
MC9S12UF32 ATA
SD/MMC
Memory
Stick
Smart
Media
RS-232
Status
LEDs
J10
J9
+12V Power
Supply
EN
VDDR VDD3X
VDDX
+5V
Q1
REF_3V +3.3V
Voltage
Select
PWR3VOFF
PWR5VOFF
J4
Top
Compact
Flash
Bottom
Compact
Flash
J16
J12
W5/W6
VDDX
W19
CFA5
CFA6
CFATA_x
CFA(3..10)
PT(0..3)
Sx
MSx
SDx
ATA
TERMS
VDDA
J7
J19
J17
J13
J31
J11
J2
J5
J1
J3

Configuration and Operation
Using The Board Connectors
User’s Manual EVB912UF32 Evaluation Board - Rev 1
MOTOROLA Configuration and Operation 11
2.3.3 USB Interface
The USB Device Module of the MC9S12UF32 connects directly to
a USB type B connector, J5. For details on the operation of the
USB interface, please refer to the MC9S12UF32 data sheet.
2.4 Using The Board Connectors
Table 2-4 lists the EVB912UF32 connectors, explaining their function, and
any special instructions for using the connector.
Table 2-4 EVB912UF32 Connectors
Connector Purpose Comments
J1 External Clock Connector for inputting a system clock from and external
source such as a waveform generator. Provides a standard
BNC connection. Input clock must be <= +5 volts.
J2 ATA5 Connector for standard 40 conductor ATA ribbon cable.
Shares signals with the top side CompactFlash connector.
J3 BDM Background debug connector, 6 pin version. Compatible with
the Multilink BDM produced by P&E Microcomputer Systems.
J4 Break Out Mainly USB, power control, configuration, and control signals
J5 USB Connector for USB 2.0 interface
J6 VDDR current
measurement
connector
Jumper to enable in circuit measurement of the current
consumed by the processor from the VDDR source. Remove
the jumper and place an ammeter in line between the posts to
measure the current.
J7 SmartMedia Connector for plugging in SmartMedia compatible memory
cards.
J8 VDDX current
measurement
connector
Jumper to enable in circuit measurement of the current
consumed by the processor from the VDDX source. Remove
the jumper and place an ammeter in line between the posts to
measure the current.
J9 Break Out Mainly CompactFlash and ATA5 signals.
J10 Break Out Mainly CompactFlash and ATA5 signals.
J11 CompactFlash
(top side) Connector for a standard Type II CompactFlash card. Shares connections with the ATA connector.
J12 Break Out Mainly SmartMedia signal connections.

EVB912UF32 Evaluation Board- Rev 1 User’s Manual
12 Configuration and Operation MOTOROLA
Configuration and Operation
2.5 Using the Memory Cards
The users must obtain their owncompatible cards for use with these connectors.
Please note the power for most of these cards is connected to P3.3V which is
+3.3 volts. The CompactFlash (CF) connectors are power by VDDX that can
switch between zero volts, +3.3 volts and+5 volts under software control. W19
selects power to the control signals of all memory card connectors except J11
(the top side CF). VDDX always powers the control signals to J11. The user
J13 CompactFlash
(bottom side) Connector for a standard Type II CompactFlash card. Shares connections with SD/MMC, Memory Stick, and SmartMedia
connectors.
J15, J23 GND Ground test point connections.
J16 Break Out Mainly SD/MMC and Memory Stick signals
J17 SD/MMC Connector for plugging in SD/MMC compatible memory cards.
J18 3.3V 3.3 volt test point
J19 Memory Stick Connector for standard Memory Stick memory cards. Slide the
memory stick into the connector until it snaps into place.
J20 Power Connector for nominal +12V input power. Jack is center
positive.
J21 5V 5 volt test point
J22 12V 12 volt test point (input power)
J24 REC2_IN Unused RS-232 receiver output
J25 TR2_OUT Unused RS-232 transmitter output
J26 V- Negative RS-232 voltage test point
J27 V+ Positive RS-232 voltage test point
J28 REC2_OUT Unused RS-232 receiver input
J29 TR2_IN Unused RS-232 transmitter input
J30 RI Ring Indicator pin of RS-232 connector (J31)
J31 RS232 DCE Connector for RS232 interface using RXD and TXD only.
Jumpers can be used to looped back RS232 control signals to
each other.
Table 2-4 EVB912UF32 Connectors (Continued)
Connector Purpose Comments

Configuration and Operation
Using the Memory Cards
User’s Manual EVB912UF32 Evaluation Board - Rev 1
MOTOROLA Configuration and Operation 13
must exercise caution not to select VDDX when using the SD/MMC, Memory
Stick, or SmartMedia cards. Use W19 to select VDDX as the power source for
VDD3X when using the bottom side CompactFlash, J13. Some of the signals
on J13 are directly powered by VDDX and the rest are referenced to VDD3X.
Caution: W19 must not select VDDX for VDD3X power when using the
SD/MMC, Memory Stick, or SmartMedia cards.
Caution: To avoid circuit damage, do not plug in SmartMedia, SD/MMC, or
Memory Stick cards with power applied to the board.

EVB912UF32 Evaluation Board- Rev 1 User’s Manual
14 Configuration and Operation MOTOROLA
Configuration and Operation