Analog Devices ADP5588 Manual

FEATURES

10 column × 8 rows port expander, maximum 10 × 8 keypad
matrix
Rows and columns configurable to keypad, GPI or GPO
Dual light sensor inputs
2
I C interface
Auto increment capability
1.8 V and 3.0 V operation for I
Interrupt capability
ADP5588 evaluation software included
On-board reset
GPO indicator LEDs
GPIO jumper configuration
Switches to set GPI levels

GENERAL DESCRIPTION

The ADP5588 demonstration board is used to exercise the
features of the ADP5588 keypad/GPIO expander IC. It consists
of a daughterboard and a motherboard. The motherboard houses
the keypad (80 switches), a USB connector (JP1), a reset switch
(S17), and all the hardware necessary to power the IC and establish
USB communication with the PC. Two 20-pin connectors (J11
and J12) are used to plug in the daughterboard. The ADP5588
IC is mounted on the daughterboard along with the LK1 and LK2
jumpers, which are used to insert or remove the C19 and C20
capacitors from the light sensor comparator circuitry.
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.
2
C and GPIOs (1.7 V ~ 3.0 V)

MOTHERBOARD LAYOUT

DAUGHTER
ALS JUMPER
BOARD
CONNECTORS
RESET SWITCH
USB CONNCTOR
ADP5588 Keypad I/O Expander
The demonstration board assembly is powered either via J10 or
the USB port and comes with a free graphical user interface (GUI)
to exercise the ADP5588 features. In addition to the keypad
switches, the motherboard also has 18 GPO LED indicators (D1
through D11, D22 through D27, and D30), power status LEDs
(D19 and D21), a 2.7 V regulator, a 3.3 V regulator, and jumpers
(J1 through J8 and J13 through J22) to configure the GPIOs as
GPIs, GPOs, or keypad lines. The motherboard is equipped with
jumpers (LK8 and LK10) to configure the board to use either
external regulated voltages via J10 or the on-board regulators when
plugged into the USB port. When using the USB port as the power
source, place jumpers across Pin 1 and Pin 2 of LK8 and LK10.
When using external voltages, place jumpers across Pin 2 and
Pin 3 of LK8 and LK10. V
and V (Pin 1 of J10) should be 3.3 V.
BOARD
A set of switches (SW1 through SW18) provides logic high
(Logic 1) or logic low (Logic 0) drives to the GPIOs configured
as GPIs. Column 8 and Column 9 of the IC have an additional
jumper (J9) that allows the user to configure theses lines into
light sensor comparator inputs. Place a jumper across Pin 1 and
Pin 3 of J9 and another across Pin 2 and Pin 4 of J9 to configure
these pins as Keypad Column 8 and Keypad Column 9, or place
a jumper across Pin 3 and Pin 5 of J9 and another across Pin 4
and Pin 6 of J9 to configure these pins as light sensor inputs.
GPO LEDs
GPI SWITCHES
GPIO JUMPER SETTINGS
KEYPAD SWITCHES
Figure 1.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Evaluation Board
EVAL-ADP5588
(Pin 3 of J10) should be 1.8 V to 3.0 V,
CC
www.analog.com
©2009 Analog Devices, Inc. All rights reserved.