PmodPMON1™ Reference Manual Revision: January 27, 2013 Note: This document applies to REV B of the board. 1300 NE Henley Court, Suite 3 Pullman, WA 99163 (509) 334 6306 Voice | (509) 334 6300 Fax Overview The PmodPMON1 employs the Analog Devices® AD5112 and ADM1191 to create a system power monitor. Features include: • • • • • monitor current draws less than 1.058A monitor voltages from 3.16V to 26V on the J3 VIN pin DVDD input ranges from 3V to 5.5V standard I2C interface configurable device address allows for up to nine PMON1s in a single system Functional Description Customers can configure the PMON1 to a wide range of possible alert conditions from the ADM1191 by using the configurable AD5112 potentiometer. The AD5112 upper potentiometer connection ties to DVDD through a filtering ferrite bead and the lower connection connects to GND. (See Table 1 for Connector Descriptions.) The wiper directly connects to the SETV pin on the ADM1191 to allow for the wide range of alert conditions. If an alert condition occurs, LD1 on the PMON1 will illuminate and the alert pin will go to a logic low state. Using Multiple PMON1’s In order to use multiple PMON1’s on a single I2C bus, each individual PMON1 will need to be connected; and the desired potentiometer value programmed into the EEPROM on the AD5112. Any stored value will become the default starting value for the potentiometer. The alert functionality available on the ADM1191 will not function properly without programming each individual device. (See Table 2 for Jumper Descriptions.) Doc: 502-265 Device Configuration For specific information related to device configuration on the AD5112 and ADM1191, please refer to the data sheets available at www.analog.com Pin 1,2 3,4 1,2 3,4 5,6 7,8 1 2 3 Connector J1 – Control Pins Signal Description CONV Trigger a conversion Overcurrent or ALERT overvoltage event Connector J2 – I2C Interface SCL Serial Clock SDA Serial Data GND Ground DVDD Input Voltage Connector J3 – Power Monitor Screw Terminal Input voltage of device to VIN monitored GND Ground Voltage supplied to VOUT device being monitored Table 1. Connector Descriptions page 1 of 2 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. ® PmodPMON1™ Reference Manual Jumper JP1 JP2 www.digilentinc.com Setting Description ADM1191 Address bit 3 1 and 2 set to 0b00 ADM1191 Address bit 3 3 and 2 set to 0b01 ADM1191 Address bit 3 OFF and 2 set to 0b10 ADM1191 Address bit 1 1 and 0 set to 0b00 ADM1191 Address bit 1 3 and 0 set to 0b01 ADM1191 Address bit 1 OFF and 0 set to 0b10 Table 2. Jumper Descriptions www.digilentinc.com Copyright Digilent, Inc. page 2 of 2