Keypad Decoder and I/O Expansion ADP5585 FEATURES FUNCTIONAL BLOCK DIAGRAM VDD GND ADP5585 UVLO POR RST/R5 SDA OSCILLATOR I2C INTERFACE SCL INT KEY SCAN AND DECODE R0 R1 GPI SCAN AND DECODE R2 R3 R4 C0 C1 I/O CONFIG REGISTERS LOGIC PWM C2 C3 C4 RESET1 GEN RESET2 GEN 09841-001 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 Figure 1. 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. 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 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 The programmable logic functions allow common logic requirements to be integrated as part of the GPIO expander; thus, saving board area and cost. 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. 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. Trademarks and registered trademarks are the property of their respective owners. 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. ADP5585 OUTLINE DIMENSIONS 1.630 1.590 SQ 1.550 4 3 2 1 A BALL 1 IDENTIFIER B 1.20 REF C D 0.40 REF SEATING PLANE BOTTOM VIEW (BALL SIDE UP) SIDE VIEW COPLANARITY 0.05 0.300 0.260 0.220 0.230 0.200 0.170 Figure 2. 16-Ball Wafer Level Chip Scale Package [WLCSP] (CB-16-10) Dimensions shown in millimeters I2C refers to a communications protocol originally developed by Philips Semiconductors (now NXP Semiconductors). ©2011 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D09841F-0-5/11(Sp0) Rev. Sp0 | Page 2 of 2 01-20-2011-A 0.545 0.500 0.455 TOP VIEW (BALL SIDE DOWN)