410-219 Digilent

1300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodIOXP Reference Manual Revised May 23, 2013 This manual applies to the PmodIOXP rev. A Overview The Digilent PmodIOXP is an Input/Output Expansion module capable of providing up to 19 additional IO pins. Features include: Communicates via the IC interface 16-element FIFO for event recording 19 configurable I/Os Built-in keypad decoding for matrices up to 118 PWM generator Open-drain interrupt output Two programmable logic blocks Debouncing on I/Os The PmodIOXP. 1 Functional Description The PmodIOXP utilizes Analog Devices ADP5589. Through the use of IC, users may expand from the two I/O pins required to nearly 10 times the amount of available I/O. 2 Interfacing with the Pmod The PmodIOXP communicates with the host board via the IC protocol. By sending out the 7-bit slave address of 0110100 and a read or write bit (1/0), users may then read or write to a specific register to configure the Pmod to enable interrupts or read the status of GPIO pins. Copyright Digilent, Inc. All rights reserved. DOC : 502-219 Page 1 of 2 Other product and company names mentioned may be trademarks of their respective owners. PmodIOXP Reference Manual 2.1 Pinout Description Table Pin Signal Description 1 & 5 SCL Serial Clock 2 & 6 SDA Serial Data 3 & 7 GND Power Supply Ground 4 & 8 VCC Power Supply (3.3V/5V) Any external power applied to the PmodIOXP must be within 1.65V and 3.6V it is recommended that Pmod is operated at 3.3V. 3 Physical Dimensions The pins on the pin header are spaced 100 mil apart. The PCB is 1.3 inches long on the sides parallel to the pins on the pin header and 2.3 inches long on the sides perpendicular to the pin header. Copyright Digilent, Inc. All rights reserved. Page 2 of 2 Other product and company names mentioned may be trademarks of their respective owners.