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ADP5585ACPZ-00-R7 Datasheet(PDF) 1 Page - Analog Devices |
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ADP5585ACPZ-00-R7 Datasheet(HTML) 1 Page - Analog Devices |
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1 / 40 page  Keypad Decoder and I/O Expansion Data Sheet ADP5585 Rev. C 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 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 APPLICATIONS Keypad entries and input/output expansion capabilities Smart phones, remote controls, and cameras Healthcare, industrial, and instrumentation FUNCTIONAL BLOCK DIAGRAM SDA GPI SCAN AND DECODE UVLO POR I2C INTERFACE OSCILLATOR REGISTERS KEY SCAN AND DECODE LOGIC I/O CONFIG INT RST/R5 PWM SCL VDD ADP5585 GND RESET1 GEN RESET2 GEN R0 R3 R1 R2 R4 C0 C1 C2 C3 C4 Figure 1. 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 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. |
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