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DS1821S+ Datasheet(PDF) 8 Page - Dallas Semiconductor |
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DS1821S+ Datasheet(HTML) 8 Page - Dallas Semiconductor |
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8 / 18 page  DS1821 8 of 18 CONFIGURATION REGISTER BIT DESCRIPTIONS Table 3 Bit Name (User Access) Functional Description DONE — Temperature Conversion Done (Read Only) DONE = 0 — Temperature conversion is in progress. DONE = 1 — Temperature conversion is complete. NOTE: DONE = 0 at POR. NVB — Non-volatile Memory Busy (Read Only) NVB = 0 — Nonvolatile memory is not busy. NVB = 1 — A write to EEPROM memory is in progress THF* — Temperature High Flag (Read/Write) THF = 0 — The measured temperature has not exceeded the value stored in the TH register. THF = 1 — At some point in time the measured temperature has been higher than the value stored in the TH register. THF will remain a 1 until it is over-written with a 0 by the user. TLF* — Temperature Low Flag (Read/Write) TLF = 0 — The measured temperature has not been lower than the value stored in the TL register. TLF = 1 — At some point in time the measured temperature has been lower than the value stored in the TL register. TLF will remain a 1 until it is over-written with a 0 by the user. T/R ¯* — Power-up Operating Mode (Read/Write) T/R ¯ = 0 — DS1821 powers up in 1- wire mode. T/R ¯ = 1 — DS1821 powers up in thermostat mode. POL* — Thermostat Output (DQ) Polarity (Read/Write) POL = 0 — Thermostat output (DQ) is active low. POL = 1 — Thermostat output (DQ) is active high. 1SHOT* — Conversion Mode (Read/Write) 1SHOT = 0 — Continuous conversion mode. The Start Convert T [EEh] command initiates continuous temperature conversions, which can be stopped with the Stop Convert T [22h] command. 1SHOT = 1 — One-shot mode. The Start Convert T [EEh] command initiates a single temperature conversion after which the DS1821 returns to a low-power standby state. *Stored in EEPROM |
Similar Part No. - DS1821S+ |
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Similar Description - DS1821S+ |
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