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參數(shù)資料
| 型號： | DS1923-F5 |
| 英文描述： | Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory |
| 中文描述： | Hygrochron溫度/濕度記錄儀與8KB數(shù)據(jù)記錄存儲(chǔ)器iButton的 |
| 文件頁數(shù)： | 34/52頁 |
| 文件大?。?/td> | 495K |
| 代理商： | DS1923-F5 |
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DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
Clear Memory with Password [96h]
The Clear Memory with Password command is used to prepare the device for another mission. This command is
only executed if no mission is in progress. After the command code the master must transmit the 64-bit full-access
password followed by a FFh dummy byte. If passwords are enabled and the transmitted password is different from
the stored full-access password or a mission is in progress, the Clear Memory with Password command will fail.
The device will stop communicating and will wait for a reset pulse. If the password was correct or if passwords
were not enabled, the device will clear the Mission Time Stamp, Mission Sample Counter, and all alarm flags of the
Alarm Status Register. After these cells are cleared, the MEMCLR bit of the General Status Register reads 1 to
indicate the successful execution of the Clear Memory with Password command. Clearing of the data log memory
is not necessary because the Mission Sample Counter indicates how many entries in the data log memory are
valid.
Forced Conversion [55h]
The Forced Conversion command can be used to measure the temperature and humidity without starting a
mission. After the command code the master has to send one FFh byte to get the conversion started. The
conversion result is found as 16-bit value in the Latest Temperature Conversion Result and Latest Humidity
Conversion Result registers. This command is only executed if no mission is in progress (MIP = 0). It cannot be
interrupted and takes maximum 666ms to complete. During this time memory access through the 1-Wire interface
is blocked. The device behaves the same way as during a mission when the sampling interferes with a
memory/control function command. See
Memory Access Conflicts
for details.
A forced conversion must not be
attempted while the RTC oscillator is stopped.
This causes the device to enter into an unrecoverable state.
Start Mission with Password [CCh]
The DS1923 uses a control function command to start a mission. A new mission can only be started if the previous
mission has been ended and the memory has been cleared. After the command code, the master must transmit
the 64-bit full-access password followed by a FFh dummy byte. If passwords are enabled and the transmitted
password is different from the stored full-access password or a mission is in progress, the Start Mission with
Password command will fail. The device stops communicating and waits for a reset pulse. If the password was
correct or if passwords were not enabled, the device starts a mission. If SUTA = 0, the sampling begins as soon as
the mission start delay is over. If SUTA = 1, the first sample is written to the data log memory at the time the
temperature alarm occurred. However, the Mission Sample Counter does
not
increment. One sample period later,
the Mission Time Stamp will be set and the regular sampling and logging begins. While the device is waiting for a
temperature alarm to occur, the WFTA flag in the general status register will read 1. During a mission there is only
read access to the Register Pages.
Stop Mission with Password [33h]
The DS1923 uses a control function command to stop a mission. Only a mission that is in progress can be
stopped. After the command code, the master must transmit the 64-bit full-access password followed by a FFh
dummy byte. If passwords are enabled and the transmitted password is different from the stored full-access
password or a mission is not in progress, the Stop Mission with Password command will fail. The device stops
communicating and waits for a reset pulse. If the password was correct or if passwords were not enabled, the
device clears the MIP bit in the General Status Register and restore write access to the Register Pages. The
WFTA bit is not cleared. See the description of the General Status Register for a method to clear the WFTA bit.
MEMORY ACCESS CONFLICTS
While a mission is in progress or while the device is waiting for a temperature alarm to start a mission, periodically
a temperature and/or humidity sample is taken and logged. This "internal activity" has priority over 1-Wire
communication. As a consequence, device-specific commands (excluding ROM function commands and 1-Wire
reset) will not perform properly when internal and "external" activities interfere with each other. Not affected are the
commands Start Mission, Forced Conversion, and Clear Memory because they are not applicable while a mission
is in progress or while the device is waiting for a temperature alarm. The table below explains how the remaining
five commands are affected by internal activity, how to detect this interference and how to work around it.
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS1923-F5+ | 功能描述:iButton RoHS:否 存儲(chǔ)類型:SRAM 存儲(chǔ)容量:512 B 組織: 工作電源電壓:3 V to 5.25 V 接口類型:1-Wire 最大工作溫度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封裝 / 箱體:F5 MicroCan 制造商:Maxim Integrated |
| DS19310 | 制造商:SANYO 制造商全稱:Sanyo Semicon Device 功能描述:Color TV Owners Manual Manuel dinstructions du teleouleur Color TV Manual Del Propietario |
| DS193-K | 制造商:Miyama Electric 功能描述: |
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