Rainbow Electronics DS18B20-PAR User Manual
Parasite-power digital thermometer
Table of contents
Document Outline
- FEATURES
- PIN ASSIGNMENT
- PIN DESCRIPTION
- D
- DESCRIPTION
- OVERVIEW
- DS18B20-PAR BLOCK DIAGRAM Figure 1
- PARASITE POWER
- SUPPLYING THE DS18B20-PAR DURING TEMPERATURE CONVERSIONS Figure 2
- OPERATION – MEASURING TEMPERATURE
- TEMPERATURE REGISTER FORMAT Figure 3
- TEMPERATURE/DATA RELATIONSHIP Table 2
- OPERATION – ALARM SIGNALING
- TH AND TL REGISTER FORMAT Figure 4
- 64-BIT LASERED ROM CODE
- 64-BIT LASERED ROM CODE Figure 5
- MEMORY
- DS18B20-PAR MEMORY MAP Figure 6
- CONFIGURATION REGISTER
- CONFIGURATION REGISTER Figure 7
- THERMOMETER RESOLUTION CONFIGURATION Table 3
- CRC GENERATION
- CRC GENERATOR Figure 8
- 1-WIRE BUS SYSTEM
- HARDWARE CONFIGURATION
- HARDWARE CONFIGURATION Figure 9
- TRANSACTION SEQUENCE
- INITIALIZATION
- ROM COMMANDS
- SEARCH ROM [F0h]
- READ ROM [33h]
- MATCH ROM [55h]
- SKIP ROM [CCh]
- ALARM SEARCH [ECh]
- DS18B20-PAR FUNCTION COMMANDS
- CONVERT T [44h]
- WRITE SCRATCHPAD [4Eh]
- READ SCRATCHPAD [BEh]
- COPY SCRATCHPAD [48h]
- RECALL E2 [B8h]
- DS18B20-PAR Function Command Set Table 4
- NOTES:
- ROM COMMANDS FLOW CHART Figure 10
- DS18B20-PAR FUNCTION COMMANDS FLOW CHART Figure 11
- 1-WIRE SIGNALING
- 1-WIRE SIGNALING
- INITIALIZATION PROCEDURE: RESET AND PRESENCE PULSES
- INITIALIZATION TIMING Figure 12
- READ/WRITE TIME SLOTS
- WRITE TIME SLOTS
- READ/WRITE TIME SLOT TIMING DIAGRAM Figure 13
- READ TIME SLOTS
- DETAILED MASTER READ 1 TIMING Figure 14
- RECOMMENDED MASTER READ 1 TIMING Figure 15
- RELATED APPLICATION NOTES
- DS18B20-PAR OPERATION EXAMPLE 1
- DS18B20-PAR OPERATION EXAMPLE 2
- ABSOLUTE MAXIMUM RATINGS*
- DC ELECTRICAL CHARACTERISTICS (-55˚C to +100˚C; VPU=3.0V to 5.5V)
- NOTES:
- AC ELECTRICAL CHARACTERISTICS: NV MEMORY
- (-55˚C to +100˚C; VPU=3.0V to 5.5V)
- AC ELECTRICAL CHARACTERISTICS (-55˚C to +100˚C; VPU=3.0V to 5.5V)
- NOTES:
- TYPICAL PERFORMANCE CURVE Figure 16
- TIMING DIAGRAMS Figure 17