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PDF ADP5585 Data sheet ( Hoja de datos )
| Número de pieza | ADP5585 | |
| Descripción | Keypad Decoder and I/O Expansion | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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Keypad Decoder and I/O Expansion
ADP5585
FEATURES
16 element FIFO for event recording
10 configurable I/Os allowing functions such as
Key pad decoding for a matrix of up to 5 × 5
11 GPIOs (5 × 6) with an ADP5585ACBZ-01-R7 option
Key press/release interrupts
GPIO functions
GPI with selectable interrupt level
100 kΩ or 300 kΩ pull-up resistors
300 kΩ pull-down resistors
GPO with push-pull or open-drain
Programmable logic block
PWM generator
Internal PWM generation
External PWM with internal PWM AND function
Reset generators
I2C interface with fast mode plus (Fm+) support of up to 1 MHz
Open-drain interrupt output
16-ball WLCSP, 1.59 mm × 1.59 mm
APPLICATIONS
Keypad entries and input/output expansion capabilities
Smart phones, remote controls, and cameras
Healthcare, industrial, and instrumentation
GENERAL DESCRIPTION
The ADP5585 is a 10 input/output port expander with a built-in
keypad matrix decoder, programmable logic, reset generator, and
PWM generator. Input/output expander ICs are used in portable
devices (phones, remote controls, and cameras) and nonportable
applications (healthcare, industrial, and instrumentation). I/O
expanders can be used to increase the number of I/Os available
to a processor or to reduce the number of I/Os required through
interface connectors for front panel designs.
The ADP5585 handles all key scanning and decoding and can
flag the main processor via an interrupt line that new key events
have occurred. GPI changes and logic changes can also be tracked
RST/R5
SDA
SCL
FUNCTIONAL BLOCK DIAGRAM
VDD
GND
ADP5585
UVLO
POR
OSCILLATOR
I2C INTERFACE
R0
R1
R2
R3
R4 I/O
CONFIG
C0
C1
C2
C3
C4
KEY SCAN
AND
DECODE
GPI SCAN
AND
DECODE
LOGIC
PWM
RESET1
GEN
RESET2
GEN
Figure 1.
REGISTERS
INT
as events via the FIFO, eliminating the need to monitor different
registers for event changes. The ADP5585 is equipped with a
FIFO to store up to 16 events. Events can be read back by the
processor via an I2C-compatible interface.
The ADP5585 frees up the main processor from having to
monitor the keypad, thereby reducing power consumption
and/or increasing processor bandwidth for performing other
functions.
The programmable logic functions allow common logic require-
ments to be integrated as part of the GPIO expander; thus,
saving board area and cost.
For more information about the ADP5585, including the complete data sheet, contact your local Analog Devices, Inc., sales office at
www.analog.com/sales.
Rev. Sp0
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. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
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
©2011 Analog Devices, Inc. All rights reserved.
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