Materials Data From MtagPro Update Request From LogProc Download Request From MtagPro Low Batt Alarm Acknowledged By LogProc Data Received By LogProc RF TAG RF COMM CIRCUITRY MICROCONTROLLER CPU MEMORY I/O PORTS MONITOR (VOLT REG) LED "FAULT" "PROG" ON/OFF SWITCH Transmit Data To LogProc Transmit Data To MtagPro Transmit Low Batt AlarmTo LogProc Control LED's Switch Power On/Off INPUTS OUTPUTS TASKS Store Data : Tag ID# Material Type Quantity Destination Time/Date Shipped/Received Monitor Interrupts - If none in 5 min. go into power saver mode. Monitor - If voltage drops
below 4.6V send alarm to LogProc, go
into power saver mode. Transmit/Receive Data - Communicate with LogProc
and MtagPro using radio frequency. Request Update - Send signal to LogProc requesting update when Tag
data has been modified. Requirements/Constraints Dimensions = 3" x 3" x 1" Battery Life = One year Reprogrammable = 1000 times Weather-proof enclosure Figure 13: Tag Subsystem Architecture - Alternative
#1 & #2