Rainbow-electronics DS2405 Bedienungsanleitung

1 of 15 110501FEATURES§ Open-drain PIO pin is controlled bymatching 64-bit, laser-engraved registrationnumber associated with each device§ Logic lev

DS240510 of 15ROM FUNCTIONS FLOW CHART Figure 4 (cont.)

DS240511 of 15Skip ROM [CCh]The complete 1-Wire protocol for all Dallas Semiconductor iButtons contains a Skip ROM command.Since the DS2405 contains

DS240512 of 15READ/WRITE TIME SLOTSThe definitions of write and read time slots are illustrated in Figure 6. All time slots are initiated by themaste

DS240513 of 15READ/WRITE TIMING DIAGRAM Figure 6 (cont.)Read-Data Time Slot60ms £ tSLOT < 120ms1ms £ tLOWR < 15ms0 £ tRELEASE < 45ms1ms £ tR

DS240514 of 15ABSOLUTE MAXIMUM RATINGS*Voltage on any Pin Relative to Ground -0.5V to +7.0VOperating Temperature Range -40°C to +85°CStorage Tempera

DS240515 of 15NOTES:1. All voltages are referenced to ground.2. VPUP = external pullup voltage.3. Input load is to ground.4. An additional reset

DS24052 of 15ORDERING INFORMATIONDS2405 TO-92 packageDS2405Z 4-pin SOT-223 packageDS2405P 6-pin TSOC packageDS2405/T&R Tape & Reel version

DS24053 of 15Hardware ConfigurationThe 1-Wire bus has only a single line by definition; it is important that each device on the bus be able todrive i

DS24054 of 15BUS MASTER CIRCUIT Figure 3A) Open DrainTRANSACTION SEQUENCEThe sequence for accessing the DS2405 via the 1-Wire port is as follows:§ I

DS24055 of 15ROM FUNCTION COMMANDSOnce the bus master has detected a presence, it can issue one of five ROM function commands. All ROMfunction comman

DS24056 of 153. The master reads 1 bit from the 1-Wire bus. Each device will respond by placing the value of the firstbit of its respective ROM data

DS24057 of 1518. The master must learn the other devices’ ROM data. Therefore it starts another ROM Search sequenceby repeating steps 13 to 15.19. At

DS24058 of 15that same device is not found using an active-only search, CONTROL must be a logical 0 and the PIO pinis being held low by some other de

DS24059 of 15ROM FUNCTIONS FLOW CHART Figure 4