I/O Expansion. ADP5589 Datasheet

ADP5589 Expansion. Datasheet pdf. Equivalent

ADP5589 Datasheet
Recommendation ADP5589 Datasheet
Part ADP5589
Description Keypad Decoder and I/O Expansion
Feature ADP5589; Data Sheet Keypad Decoder and I/O Expansion ADP5589 FEATURES 16-element FIFO for event recording 1.
Manufacture Analog Devices
Datasheet
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Analog Devices ADP5589
Data Sheet
Keypad Decoder and I/O Expansion
ADP5589
FEATURES
16-element FIFO for event recording
19 configurable I/Os allowing functions such as
Keypad decoding for matrix up to 11 × 8
Key press/release interrupts
Key pad lock/unlock
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
Dual programmable logic blocks
PWM generator
Internal PWM generation
External PWM with internal PWM AND function
Clock divider
Reset generators
I2C interface with fast-mode plus (Fm+) support up to 1 MHz
Open-drain interrupt output
24-lead LFCSP 3.5 mm × 3.5 mm
25-ball WLCSP 1.99 mm × 1.99 mm
APPLICATIONS
Devices requiring keypad entry and I/O expansion
capabilities
FUNCTIONAL BLOCK DIAGRAM
VDD
GND
RST
SDA
SCL
ADP5589
UVLO
POR
OSCILLATOR
I2C INTERFACE
R0
R1
R2
R3
R4
R5
R6
R7
C0 I/O
C1 CONFIG
C2
C3
C4
C5
C6
C7
C8
C9
C10
KEY SCAN
AND
DECODE
GPI SCAN
AND
DECODE
LOGIC 1
LOGIC 2
CLK DIV
PWM
RESET 1
GEN
RESET 2
GEN
Figure 1.
REGISTERS
INT
GENERAL DESCRIPTION
The ADP5589 is a 19 I/O port expander with built-in keypad
matrix decoder, programmable logic, reset generator, and
PWM generator. I/O 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 ADP5589, which handles all key scanning and decoding,
can flag the main processor via an interrupt line when new key
events have occurred. In addition, GPI changes and logic
changes can be tracked as events via the FIFO, eliminating the
need to monitor different registers for event changes. The
ADP5589 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 ADP5589 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
requirements to be integrated as part of the GPIO expander,
saving board area and cost.
Rev. B
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EVALUATION KITS
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DOCUMENTATION
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SOFTWARE AND SYSTEMS REQUIREMENTS
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TOOLS AND SIMULATIONS
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DESIGN RESOURCES
ADP5589 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
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Analog Devices ADP5589
ADP5589
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
Functional Block Diagram .............................................................. 1
General Description ......................................................................... 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 5
Thermal Resistance ...................................................................... 5
ESD Caution.................................................................................. 5
Pin Configuration and Function Descriptions............................. 6
Quick Device Overview................................................................... 7
Device Enable................................................................................ 8
Device Overview .......................................................................... 8
Detailed Description ........................................................................ 9
REVISION HISTORY
1/13—Rev. A to Rev. B
Changes to Detailed Register Descriptions Section and
Table 7 .............................................................................................. 22
Changes to Table 33 and Table 34 ................................................ 29
Changes to Table 36........................................................................ 30
Changes to Table 37........................................................................ 31
Changes to Table 69........................................................................ 41
Changes to Table 84........................................................................ 46
Changes to Figure 31...................................................................... 48
8/11—Revision A: Initial Version
Data Sheet
Event FIFO .....................................................................................9
Key Scan Control...........................................................................9
GPO Output................................................................................ 15
Logic Blocks ................................................................................ 16
PWM Block................................................................................. 17
Clock Divider Block................................................................... 17
Reset Blocks ................................................................................ 17
Interrupts..................................................................................... 18
Register Interface............................................................................ 19
Register Map ................................................................................... 21
Detailed Register Descriptions ................................................. 23
Application Diagram...................................................................... 48
Outline Dimensions ....................................................................... 49
Ordering Guide .......................................................................... 49
Rev. B | Page 2 of 52







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