Rainbow Electronics DS18S20 User Manual
Digital thermometer, Features, Pin assignment
Table of contents
Document Outline
- PIN ASSIGNMENT
- PIN DESCRIPTION
- D
- DESCRIPTION
- OVERVIEW
- DS18S20 BLOCK DIAGRAM Figure 1
- OPERATION – MEASURING TEMPERATURE
- TEMPERATURE REGISTER FORMAT Figure 2
- TEMPERATURE/DATA RELATIONSHIP Table 2
- OPERATION – ALARM SIGNALING
- TH AND TL REGISTER FORMAT Figure 3
- POWERING THE DS18S20
- SUPPLYING THE PARASITE-POWERED DS18S20 DURING TEMPERATURE CONVERSIONS Figure 4
- POWERING THE DS18S20 WITH AN EXTERNAL SUPPLY Figure 5
- 64-BIT LASERED ROM CODE
- 64-BIT LASERED ROM CODE Figure 6
- MEMORY
- DS18S20 MEMORY MAP Figure 7
- 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]
- DS18S20 FUNCTION COMMANDS
- CONVERT T [44h]
- WRITE SCRATCHPAD [4Eh]
- READ SCRATCHPAD [BEh]
- COPY SCRATCHPAD [48h]
- RECALL E2 [B8h]
- READ POWER SUPPLY [B4h]
- DS18S20 FUNCTION COMMAND SET Table 4
- NOTES:
- 1-WIRE SIGNALING
- INITIALIZATION PROCEDURE: RESET AND PRESENCE PULSES
- INITIALIZATION TIMING Figure 10
- READ/WRITE TIME SLOTS
- WRITE TIME SLOTS
- READ TIME SLOTS
- READ/WRITE TIME SLOT TIMING DIAGRAM Figure 11
- DETAILED MASTER READ 1 TIMING Figure 12
- RECOMMENDED MASTER READ 1 TIMING Figure 13
- ROM COMMANDS FLOW CHART Figure 14
- DS18S20 FUNCTION COMMANDS FLOW CHART Figure 15
- DS18S20 OPERATION EXAMPLE 1
- DS18S20 OPERATION EXAMPLE 1
- DS18S20 OPERATION EXAMPLE 2
- DS18S20 OPERATION EXAMPLE 3
- RELATED APPLICATION NOTES
- ABSOLUTE MAXIMUM RATINGS*
- DC ELECTRICAL CHARACTERISTICS (-55˚C to +125˚C; VDD=3.0V to 5.5V)
- NOTES:
- AC ELECTRICAL CHARACTERISTICS: NV MEMORY
- (-55˚C to +100˚C; VDD=3.0V to 5.5V)
- AC ELECTRICAL CHARACTERISTICS (-55˚C to +125˚C; VDD=3.0V to 5.5V)
- TYPICAL PERFORMANCE CURVE Figure 16
- TIMING DIAGRAMS Figure 17