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ADP5585

Analog Devices
Part Number ADP5585
Manufacturer Analog Devices
Description Keypad Decoder and I/O Expansion
Published Jul 6, 2011
Detailed Description Data Sheet Keypad Decoder and I/O Expansion ADP5585 FEATURES 16-element FIFO for event recording 10 configurable I/Os ...
Datasheet PDF File ADP5585 PDF File

ADP5585
ADP5585

Overview
Data Sheet 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 ADP5585ACxZ-01-R7 models 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 16-lead LFCSP, 3 mm × 3 mm FUNCTIONAL BLOCK DIAGRAM VDD GND RST/R5 ADP5585 UVLO POR OSCILLATOR SDA SCL I2C INTERFACE INT 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 09841-001 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 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 proces...


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