Rainbow-electronics DS2415 Manual de usuario

1 of 14 112701FEATURES§ Real-time clock with fully compatible 1-Wire® MicroLAN interface§ Uses the same binary time/daterepresentation as the DS2

DS241510 of 141-WIRE SIGNALINGThe DS2415 requires strict protocols to insure data integrity. The protocol consists of four types ofsignaling on one l

DS241511 of 14READ/WRITE TIMING DIAGRAM Figure 9Write-1 Time Slot60ms £ tSLOT < 120ms1ms £ tLOW1 < 15ms1ms £ tREC < ¥Write-0 Time Slot60ms £

DS241512 of 14Read-data Time Slot60ms £ tSLOT < 120ms1ms £ tLOWR < 15ms0 £ tRELEASE < 45ms1ms £ tREC < ¥tRDV = 15mstSU < 1msCRYSTAL PL

DS241513 of 14ABSOLUTE MAXIMUM RATINGS*Voltage on 1-Wire to Ground -0.5V to +7.0VOperating Temperature Range -40°C to +85°CStorage Temperature Range

DS241514 of 14AC ELECTRICAL CHARACTERISTICS (-40°C to +85°C, VPUP = 2.5V to 6.0V, VBAT = 2.5V to 5.5V)PARAMETER SYMBOL MIN TYP MAX UNITS NOTESTime Sl

DS24152 of 14available until the ROM function protocol has been established. This protocol is described in the ROMfunctions flow chart (Figure 7). Th

DS24153 of 14The functions required to exercise the control functions of the DS2415 are not accessible until the ROMfunction protocol has been satisf

DS24154 of 14TIMEKEEPINGA 32.768kHz crystal oscillator is used as the time base for the real-time clock counter. The oscillator canbe turned on or of

DS24155 of 14READ CLOCK [66h]The Read Clock command is used to read the device control byte and the contents of the real-time clockcounter. After hav

DS24156 of 14CLOCK FUNCTION COMMAND FLOW CHART Figure 5

DS24157 of 14HARDWARE CONFIGURATION Figure 61-WIRE BUS SYSTEMThe 1-Wire bus is a system that has a single bus master and one or more slaves. In all i

DS24158 of 14INITIALIZATIONAll transactions on the 1-ire bus begin with an initialization sequence. The initialization sequence consistsof a Reset Pu

DS24159 of 14ROM FUNCTIONS FLOW CHART Figure 7