ADP5520 Backlight Driver with I/O
Expander Evaluation Board
EVAL-ADP5520
Rev. 0
Evaluation boards are only intended for device evaluation and not for production purposes.
Evaluation boards are supplied “as is” and without warranties of any kind, express, implied, or
statutory including, but not limited to, any implied warranty of merchantability or fitness for a
particular purpose. No license is granted by implication or otherwise under any patents or other
intellectual property by application or use of evaluation boards. Information furnished by Analog
Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result
from its use. Analog Devices reserves the right to change devices or specifications at any time
without notice. Trademarks and registered trademarks are the property of their respective owners.
Evaluation boards are not authorized to be used in life support devices or systems.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2008 Analog Devices, Inc. All rights reserved.
FEATURES
Enables evaluation of ADP5520 main functions
Backlight control
Ambient light sensing
Auxiliary LED control
Keypad decoding
GPIOs
GENERAL DESCRIPTION
The ADP5520 evaluation board allows the user to exercise the
main features and functionality of the ADP5520 backlight
driver with I/O expander IC. A daughterboard houses the
actual IC and associated components for backlight driving. The
daughter-board plugs into a larger motherboard that houses
additional components for device configuration and stimulus.
The evaluation board is powered via the USB port and is
accompanied by a free register graphical user interface (GUI)
that allows interaction with all internal settings of the
ADP5520.
Before using the evaluation board, see the ADP5520 data sheet
for information about all features available on the device and
about the use of register settings in various modes. Information
about how to use the evaluation board and GUI software to test
some key features of the ADP5520 is given in this data sheet.
FUNCTIONAL BLOCK DIAGRAM
R0
R1
R2
R3
C0
C1
C2
C3
J1
J2
J3
J4
J5
J6
J7
J8
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
S17
RST
SW1
LOW
HIGH
SW2
LOW
HIGH
SW3
LOW
HIGH
SW4
LOW
HIGH
SW5
LOW
HIGH
SW6
LOW
HIGH
SW7
LOW
HIGH
SW8
LOW
HIGH
D11
LED 1
LED 2
LED 3
D9
D10
D17
D16
D15
D12
D13
D14
INT
D18
D19
D20
D21
USB
EXT
LK10
VBAT
OKAY
VDDIO
OKAY
VBOARD
OKAY
USB
EXT
LK9
USB
EXT
LK8
J10
D2
DAUGHTERBOARD
MOTHERBOARD
S13
S14
S15
S16
S9
S10
S11
S12
S5
S6
S7
S8
S1
S2
S3
S4
D1
D4
D5
D7
D3
D2
D6
D8
LE
D
2
KP
GP
I
GP
O
LE
D
3
KP
GP
I
GP
O
KP
GP
I
GP
O
KP
GP
I
GP
O
KP
GP
I
GP
O
KP
GP
I
GP
O
KP
GP
I
GP
O
KP
GP
I
GP
O
LK
1
LK
2
0
76
51
-00
1
Figure 1.
