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UM0242
User manual
USB Power Switch demonstrator kit
Introduction
The objective of this demonstrator is to display to the user the features and capabilities of
the USB Power switches (ST204x and ST205x) developed by STMicroelectronics using a
Windows® -based host software application and one of several USB low-speed
microcontrollers from ST acting as a peripheral device. The host software and the ST7
source code provides a clear picture of the power switch capabilities. The USB
communication between host and the device is done through a HID class based protocol
developed specially for demonstration board applications .
The demonstration board incorporates microcontroller, programmable voltage regulator,
Mosfets, switches and various resistive networks. The onboard regulator can be configured
to supply various voltages by selecting appropriate resistance from the resistive network
present at the adjust pin of the regulator. Different voltages and loads can be selected from
the PC software as well as through switches present on the board. LEDs are provided on
the board to indicate the various combinations of input voltage and load applied to the power
switch. The board has an ICC connector to program the microcontroller Flash memory. An
external 12V charge pump is also provided on the board to allow the user to perform InApplication Programming (IAP) of the microcontroller embedded Flash program memory.
Any type of real load (e.g. USB speakers) can be powered from this board by plugging in the
connector present on the board.
May 2006
Rev 1
1/17
www.st.com
www.BDTIC.com/ST
Contents
UM0242
Contents
1
2
Getting started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
System requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2
Package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3
Software installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.4
Hardware installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Running the USB power switch kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2
USBPS GUI description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3
Communication with the demonstration board . . . . . . . . . . . . . . . . . . . . . 11
2.4
Programming the MCU Flash memory . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.5
Plugging of real load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6
Demonstration board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3
Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/17
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UM0242
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Power switch board layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Enumeration result . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
USBPS_GUI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Device database window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Sampling information window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Calibration Values window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Board schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3/17
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List of tables
UM0242
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Jumper settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Switches configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
LEDs configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4/17
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UM0242
Getting started
1
Getting started
1.1
System requirements
In order to use the USB Power Switch Demonstrator with the Windows® operating system,
a recent version of Windows, such as Windows 98, Windows 2000 or Windows XP must be
installed on the PC.
The version of the Windows OS installed on your PC may be determined by clicking on the
“System” icon in the Control Panel.
1.2
Package contents
The USB Evaluation Kit includes the following items:
●
Hardware content
–
●
●
1.3
One USB Power Switch demonstration board
Software content
–
PC executable software (USBPS_GUI) for using the demonstration board
–
PC executable software (DFUGUI) for upgrading firmware through USB using
DFU feature.
–
ST7 firmware (C source code) for the ST72F62.
Documentation
–
User Manual for using the Power Switch demonstrator kit.
–
ST7262 Datasheet.
–
USB power switches datasheets.
–
Usage document for using DFUGUI.
Software installation
Run the setup file to install USBPS_GUI and follow the on-screen prompts to complete the
installation.
1.4
Hardware installation
Figure 1 shows a photograph of the demonstration board with all the components usable on
this board. The schematic of the demonstration board is given in Figure 7.
5/17
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Getting started
UM0242
Figure 1.
Power switch board layout
Charge Pump
ICC
Connector
Regulator
Microcontroller
Power
Switch
MOSFETs
Loads
CON2
CON3
1.4.1
Power supply
The microcontroller is directly powered by the USB Connector (bus-powered). While the rest
of the circuit needs a 10V/3A supply which has to be plugged in the connectors of the board
after inserting the USB cable.
6/17
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UM0242
Running the USB power switch kit
2
Running the USB power switch kit
2.1
Introduction
This USB Power Switch kit consists of two main parts: an USBPS_GUI running on PC and a
Demonstration board. Communications between the PC and the ST7 board are done
through different USB pipes:
–
Control IN and OUT during the enumeration with the bi-directional endpoint 0
–
Interrupt IN from endpoint 1 for data transferred from ST7 to PC.
–
Interrupt OUT to the endpoint 2 for the data transferred from PC to ST7.
Figure 2.
Enumeration result
By starting the USBPS_GUI on the PC, you get a graphical interface (Figure 3) for
controlling the demonstration board. This PC software is used to issue various commands
and to control data transfers between the PC and the ST7 peripheral.
2.2
USBPS GUI description
2.2.1
Main window
The USBPS GUI enables the user to configure the parameters shown in Figure 3.
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Running the USB power switch kit
Figure 3.
UM0242
USBPS_GUI
Input parameters
●
Device Select: Click the drop-down menu to select the correct board from the list of
available devices.
●
Load current: Select the correct load to apply at the switch output: 100mA, 500mA, 1A
or 2A. Larger loads can be applied by changing the load resistance R37 with the
required load on the demonstration board.
●
Input voltage: Select the correct input voltage for the switch: 4.4V, 4.75, 5.0V or 5.25V.
●
Under Voltage: Select the under voltage protection. When ON, a 1.2V supply is applied
at the switch input. At this input supply level, the Power Switch output will be zero,
displaying the cut off capability of the Power Switch at low input voltages.
●
Short Circuit: Select ON to enable a short-circuit at the Power Switch output. A graph of
short circuit current versus time will be plotted in a separate window.
●
Power Switch: Select Enable or Disable option on the GUI to control the voltage on the
Enable pin of the Power Switch.
●
Plot Reaction: Select Turn ON/OFF to display in a separate window the plotting of a
graph of the output rise time and fall time, respectively, of the Power Switch.
8/17
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UM0242
Running the USB power switch kit
Output parameters
●
Input Voltage, Output Voltage and Load Current windows display the current parameter
settings.
●
Over Current: This LED is ON when a current larger than device rating is flowing
through the device.
Device status
●
2.2.2
Connected: This LED is ON when an HID device is connected to the Power Supply
board via a USB cable.
Device Database window
The Device Database window (Figure 4) enables the user to register a new pin-compatible
power switch device by entering the device name, maximum current range, short-circuit
current and Enable signal polarity parameters.
Figure 4.
Device database window
9/17
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Running the USB power switch kit
2.2.3
UM0242
Sampling Information window
The Sampling Information window (Figure 5) enables the user to update the sampling time
and number of samples parameters for short-circuits and to enable the display of graphs
separately.
Figure 5.
2.2.4
Sampling information window
Calibration Values window
The Calibration Values window (Figure 6) is used for changing the multiplication factors
used for calibrating the ADC values.
Figure 6.
Calibration Values window
10/17
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UM0242
Running the USB power switch kit
2.3
Communication with the demonstration board
2.3.1
PC software control of the demonstration board
To use the USBPS GUI, select a particular device (i.e. Power Switch as on the
demonstration board) from Device Select drop box. Selection of an incorrect Power Switch
will lead to incorrect results.
Note:
If the correct device is not listed in the drop box, enter the required information in the Device
Database window as described in Section 2.2.2: Device Database window.
Use the various parameters described in Section 2.2: USBPS GUI description to look into
the features of the USB Power Switch.
2.3.2
Manual control of the demonstration board
This Power Switch Demonstration board can also work without the PC software. Different
voltages and loads can be selected using switch S2 & S3 respectively. Pressing S3 again
and again will increment the voltage in the above mentioned steps and after 5.25V under
voltage (i.e. 1.2V) is selected. After under voltage the next state is 4.4V. Similarly load at the
output can be varied using S2. In default state of the board, 5V is present at Power Switch
input and 100 mA load at the output.
2.3.3
Display of demonstration board state
Real time values of input voltage, output voltage of the Power Switch and its load current are
incremented every second in the GUI display window. In case of over current through the
switch, indication will be given on the GUI through over current LED.
2.4
Programming the MCU Flash memory
2.4.1
Programming through ICC
To program the MCU through ICC, plug in the ICC cable and put jumper JP4 in 2-3 position
as described in Table 1. In the firmware two S19 files are available one for sector0 (0xF0000xFFFF) and other for Sectors 1 and 2 (0xC000-0xEFFF). Program these files in the
respective sectors. The board has been tested with the INDART kit.
2.4.2
Upgrading firmware through DFU
Device firmware upgrade (DFU) is used to reprogram Sectors 1 and 2 through USB cable
without reprogramming Sector 0. Use the DFUGUI to upgrade Sectors 1 and 2. Refer to
help manual of ST7 DFUGUI for a complete description.
2.4.3
Entering DFU mode
Press and hold the switch S3 and reset the board (by pressing S1). The board will now go
into DFU mode. Now, Sectors 1 an 2 can be upgraded. To exit DFU mode, reset the board.
11/17
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Running the USB power switch kit
Table 1.
UM0242
Jumper settings
Jumper No.
Jumper Location
Jumper Setting
This jumper should always be present on the board
during normal operation. If reading of load current with
multimeter is desired then only, jumper should be
removed and ammeter should be inserted.
JP1
Connector between o/p of
power switch and load.
JP2
Connector between adjust This jumper should not be present on the board else it
pin of regulator and ground. will cause undervoltage situation. It is kept for future.
JP3
Connector between ICCLK
This jumper is useful only in ICC mode. Don't put this
pin and OSC1 pin of
jumper ON if the crystal is present.
microcontroller
JP4
Connetor Between 12V
input and Vpp pin of the
microcontroller.
Table 2.
It’s a 3 pin jumper and useful in ICC and DFU mode.
Short its 2-3 pins in ICC mode and 1-2 pins in DFU
mode. Through this jumper 12V is supplied to the Vpp
pin of the MCU.
Switches configuration
Switch No.
Table 3.
SW1
Reset
SW2
Load Switching
SW3
Input voltage switching & entry in DFU mode
LEDs configuration
LED No
2.5
Switch Use
LED Color
Glowing Condition
LED1
Red
Over Current through Power Switch
LED2
Green
Presence of 4.4V at Power Switch input.
LED3
Green
Presence of 4.75V at Power Switch input.
LED4
Green
Presence of 5.0V at Power Switch input.
LED5
Green
Presence of 5.25V at Power Switch input.
LED6
Red
Under Voltage Condition
LED7
Yellow
400mA Load LED
LED8
Yellow
600mA Load LED
LED9
Yellow
100mA Load LED
LED10
Yellow
2A Load LED
Plugging of real load
Any type of USB real load can be powered from this board. First plug the USB cable into
connector CON2 then plug the load into connector CON3.
12/17
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A
B
C
D
USBVDD
USBDM
USBDP
VSSA
USBVDD2
USBDM-2
USBDP-2
VSSA
1
VCC
VOUT
USBDM-2
USBDP-2
VSSA
USB-A-TYPE
TO LOAD
1
2
3
4
CON3
USB-B-TYPE
TO PC
1
2
3
4
CON2
USB-B-TYPE
TO PC
1
2
3
4
1
2
3
4
C9
220nF
C10
220nF
LD6
LD5
LD4
LD3
LD2
330E
R26
330E
R25
330E
R24
330E
R23
330E
R22
VPP
PD1
PD0
4
V1
V2
V3
V4
V5
OSC1
OSC2
100nF
C14
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
ST7262
U3
47k
OSC1
SHDN
GND
Vout
VCC
ST662A
C1C1+
C2C2+
U9
8
7
6
5
1.5k
R1
PD5
C11
4.7uF
C13
100nF
2
VCC
GND
JP3
USBVDD
VDDA
VSS
VSSA
GND
ICCDATA
PB6
ICCCLK
PB5
VCC R2
Charge-pump Circuit
V5
V4
V3
V2
V1
12MHz
C8
33pF
Y1
33pF
C7
4.7uF/25V
C1
2
JP4
2k2
R41
C12
4.7uF
VCC
33
32
31
30
29
28
27
26
25
24
23
RESET
32
31
AIN2
AIN3
AIN4
AIN5
AIN6
25
PB0
RDI
2
4
6
8
10
HEADER 5X2
1
3
5
7
9
CON4
ICC
33
32
31
30
29
28
27
26
25
24
23
Q1
BC557
VPP
VPP_ICC
R42
10k
10k
R20
40
25
16
14
4
VCC
10nF
ICCDATA
ICCCLK
RESET
VPP_ICC
S1
C6
47k
47k
47k
47k
47k
R7
R8
R9
R10
47k
R6
47k
R3
R4
VCC
3
S3
S2
U2-1
U2-2
U2-3
U2-4
U2-5
U2-6
U2-7
U2-8
VSS
VCC
14
U2-3
16
17
ICCDATA
ICCCLK
PB4
PB3
TDO
VPP
PD1
PD0
4
V1
V2
V3
V4
V5
OSC1
OSC2
12V
JP2
10uF/25V
C5
C3
10uF/25V
CON8
1
2
3
4
5
6
7
8
J5
CON11
1
2
3
4
5
6
7
8
9
10
11
HEATSINK
U2-16
U2-15
U2-14
U2-13
U2-12
U2-11
U2-10
U2-9
CON8
8
7
6
5
4
3
2
1
J6
CON11
11
10
9
8
7
6
5
4
3
2
1
GND
GND
GND
VCC
GND
GND
GND
GND
VCC
GND
4
5.1k
R35
1k
R35A
D2
IN4148
3
J3
11
10
9
8
7
6
5
4
3
2
1
0
R34
10k
R34A
Vout
CON11
RESET
32
31
AIN2
AIN3
AIN4
AIN5
AIN6
25
PB0
RDI
PD2
PD3
PD4
PD5
40
39
VDDA
USBVCC
USBDP
USBDM
VSSA
4.7k
J4
1k5
18k
R32
R33
R32A
10uF/25V
C2
Vin
LM317T
IN4148
J2
GND
2
U1
D1
4
CON11
1
2
3
4
5
6
7
8
9
10
11
J1
GND
X2
VCC12V
X1
HS1
POWER SWITCH DEMO
3
VR4
CON1
1
VR1
Adjust
1
VR3
PD2
PD3
PD4
PD5
40
39
VDDA
USBVCC
USBDP
USBDM
VSSA
2
1
VR5
44
43
42
41
40
39
38
37
36
35
34
44
43
42
41
40
39
38
37
36
35
34
12
13
14
15
16
17
18
19
20
21
22
12
13
14
15
16
17
18
19
20
21
22
VSS
USBVDD
14
U2-3
16
17
ICCDATA
ICCCLK
PB4
PB3
TDO
2
1
10k
470E
R50
R49
R48
R12
R47
R46
R45
R44
R43
R11
PD2
47k
PB3
47k
PB0
47k
PB4
47k
PB6
47k
PB5
47k
PD4
47k
PD0
47k
PD1
47k
PD3
47k
10k
R15
AIN5
R14
R13
Scale
Size
B
U2-1
U2-2
U2-3
U2-4
U2-5
U2-6
U2-7
U2-8
16
15
14
13
12
11
10
9
U2-16
U2-15
U2-14
U2-13
U2-12
U2-11
U2-10
U2-9
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
D1
D1
D2
D2
D1
D1
D2
D2
D1
D1
D2
D2
JP1
LD7
LD9
10E/5W
R39
50E/2W
R38
330E
R28
0.1E/5W
R36
10k
D1
D1
D2
D2
STS8DNH3LL
S1
G1
S2
G2
5
FCSM No.
USB_DEMO_SWITCH
LD10
LD8
Sheet
330E
R30
330E
R27
0 of 0
1E/5W
R37
5E/5W
R40
6
1E/5W
R19
R31
10k
330E
DWG No.
47k
GND
10k
10k
R51
R52
10k
R17
AIN3
R18
AIN4
10k
6
R16
U8
8
7
6
5
8
7
6
5
VR5
VR4
VR3
VR1
VOUT
47k
VCC
R53
10uF
C4
R5
330E
R21
R29
D1
D1
D2
D2
8
7
6
5
8
7
6
5
8
7
6
5
AIN2
LD1
STS8DNH3LL
S1
G1
S2
G2
U7
STS8DNH3LL
S1
G1
S2
G2
U6
STS8DNH3LL
S1
G1
S2
G2
U5
STS8DNH3LL
S1
G1
S2
G2
U4
Switching Circuit
ST20XX
GNDA OC1
IN1 OUT1
EN1 OUT2
EN2
OC2
GNDB OC3
IN2 OUT3
EN3 OUT4
EN4
OC4
Deepu Arora
STMicroelectronics
1
2
3
4
5
6
7
8
U2
USB Power Switch
5
1
2
Rev
1
A
B
C
D
Figure 7.
AIN6
2.6
1
2
3
UM0242
Running the USB power switch kit
Demonstration board schematic
Board schematic
13/17
Bill of materials
UM0242
3
Bill of materials
Table 4.
Bill of materials
Index
1
Qty
Reference
Value/Generic
part number
Package
Manifacturer‘s
ordering
Manufacturer
code/orderable part
number
1
R1
1.5K
SMD 0805
Any
2
20
R2, R3, R4, R5, R6,
R7, R8, R9, R10, R11,
R12, R43, R44, R45,
R46, R47, R48, R49,
R50, R51
47K
SMD 0805
Any
3
1
R13
470E
SMD 0805
Any
4
11
R14, R15, R16, R17,
R18, R19, R20, R42,
R52, R53, R34A
10K
SMD 0805
Any
5
10
R21, R22, R23, R24,
R25, R26, R27, R28,
R29, R30
330E
SMD 0805
Any
6
1
R35A
1K
SMD 0805
Any
7
1
R33
1K5
SMD 0805
Any
8
1
R32
4K7
SMD 0805
Any
9
1
R35
5K1
SMD 0805
Any
10
1
R32A
18K
SMD 0805
Any
11
1
R34
0E
SMD 0805
Any
12
1
R41
2K2
SMD 0805
Any
13
1
R36
0.1E, 5W
Leaded
RS
Components
14
2
R31, R37
1E, 5W
Leaded
Any
15
1
R40
5E ,5W
Leaded
Any
16
1
R39
10E, 5W
Leaded
Any
17
1
R38
50E, 2 W
Leaded
Any
18
3
C1, C11, C12
4.7uF, 25V
RB-.2/.4
Any
19
4
C2, C3, C4, C5
10uF, 25V
RB-.2/.4
Any
20
1
C6
10nF
SMD 0805
Any
21
2
C7, C8
33pF
SMD 0805
Any
22
2
C9, C10
220nF
Leaded
Any
23
2
C13, C14
100nF
SMD 0805
Any
24
4
LD2, LD3, LD4, LD5
Thru Hole LED
3mm -Green
Any
RS199-6378
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UM0242
Table 4.
Index
Bill of materials
Bill of materials (continued)
Qty
Reference
Value/Generic
part number
Package
Manifacturer‘s
ordering
Manufacturer
code/orderable part
number
25
4
LD7, LD8 ,LD9, LD10
Thru Hole LED
3mm -Yellow
Any
26
2
LD1, LD6
Thru Hole LED
3mm -Red
Any
27
1
U1
LM238
TO-3
ST
SO-8 or SO-16 ST
ST2042BDR, or
ST2044BDR, or
ST2052BDR, or
ST2054BDR
LM238K
28
1
U2
ST2042BDR, or
ST2044BDR, or
ST2052BDR, or
ST2054BDR
29
1
U3
ST72F621J4
TQFP-44
ST
ST72F621J4T1
30
5
U4, U5, U6, U7, U8
STS8DNH3LL
SO-8
ST
STS8DNH3LL
31
1
U9
ST662A
SO-8
ST
ST662ABD-TR
32
1
Q1
BC557 or BC558 TO-92A
Any
33
2
D1, D2
IN4148
DO-35
Any
34
3
S1, S2, S3
Push Button
Any
35
2
CON1, CON2
USB-B-TYPE
USB-B
Kycon
KUSB-BS-1-N-BLK
36
1
CON3
USB-A-TYPE
USB-A
Kycon
KUSB-AS-1-N-BLK
37
1
CON4
HEADER 5X2
IDC-10B
Any
38
1
Y1
12MHz Crystal
XTAL-3
Any
39
1
HS1
Heat Sink
HS-TO3
Any
40
1
X1
VCC12V
RS738-547
FARNELL
150-039
41
1
X2
GND
RS738-547
FARNELL
150-040
42
4
J1, J2, J3, J4
CON11
SIP-11
Any
43
2
J5, J6
CON8
SIP-8
Any
44
3
JP1, JP2, JP3
CON2
SIP-2
Any
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Revision history
4
UM0242
Revision history
Revision history
Date
Revision
19-May-2006
1
Changes
Initial release.
16/17
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UM0242
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