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ADP5589ACBZ-02-R7 Datasheet(PDF) 1 Page - Analog Devices |
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ADP5589ACBZ-02-R7 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 52 page  Keypad Decoder and I/O Expansion Data Sheet ADP5589 Rev. B Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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 ©2011–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com 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 SDA GPI SCAN AND DECODE UVLO POR I2C INTERFACE OSCILLATOR REGISTERS KEY SCAN AND DECODE LOGIC 1 I/O CONFIG INT RST LOGIC 2 CLK DIV PWM SCL VDD ADP5589 GND RESET 1 GEN RESET 2 GEN R0 R3 R1 R2 R4 R7 R5 R6 C0 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 Figure 1. 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. |
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