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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)記錄存儲器iButton的 |
| 文件頁數(shù)： | 15/52頁 |
| 文件大小： | 495K |
| 代理商： | DS1923-F5 |
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DS1923: Hygrochron Temperature/Humidity Logger iButton with 8kB Data Log Memory
TIMEKEEPING AND CALENDAR
The real-time clock/alarm and calendar information is accessed by reading/writing the appropriate bytes in the
register page, address 200h to 205h. For readings to be valid, all RTC registers must be read sequentially starting
at address 0200h. Some of the RTC bits are set to 0. These bits always read 0 regardless of how they are written.
The number representation of the real-time clock registers is BCD format (Binary-Coded Decimal).
Real-Time Clock and RTC Alarm Register Bitmap
15 of 52
ADDR
0200h
0201h
0202h
b7
0
0
0
b6
b5
b4
b3
b2
b1
b0
10 Seconds
10 Minutes
20h.
AM/PM
Single Seconds
Single Minutes
12/24
10h.
Single Hours
0203h
0204h
0205h
0
0
0
10 Years
10 Date
0
Single Date
Single Months
Single Years
CENT
10m.
The real-time clock of the DS1923 can run in either 12-hour or 24-hour mode. Bit 6 of the Hours Register (address
202h) is defined as the 12- or 24-hour mode select bit. When high, the 12-hour mode is selected. In the 12-hour
mode, bit 5 is the AM/PM bit with logic 1 being PM. In the 24-hour mode, bit 5 is the 20-hour bit (20 to 23 hours).
The CENT bit, bit 7 of the Months Register, can be written by the user. This bit changes its state when the years
counter transitions from 99 to 00.
The calendar logic is designed to automatically compensate for leap years. For every year value that is either 00 or
a multiple of 4 the device will add a 29th of February. This will work correctly up to (but not including) the year
2100.
SAMPLE RATE
The content of the Sample Rate Register (addresses 0206h, 0207h) specifies the time elapse (in seconds if EHSS
= 1, or minutes if EHSS = 0) between two temperature/humidity logging events. The sample rate can be any value
from 1 to 16383, coded as an unsigned 14-bit binary number. If EHSS = 1, the shortest time between logging
events is 1 second and the longest (sample rate = 3FFFh) is 4.55 hours. If EHSS = 0, the shortest is 1 minute and
the longest time is 273.05 hours (sample rate = 3FFFh). The EHSS bit is located in the RTC Control Register at
address 0212h. It is important that the user sets the EHSS bit accordingly while setting the Sample Rate register
. A
sample rate of 0000h is not valid and must be avoided under all circumstances.
This causes the device to
enter into an unrecoverable state.
Sample Rate Register Bitmap
ADDR
0206h
0207h
b7
b6
b5
b4
b3
b2
b1
b0
Sample Rate Low
0
0
Sample Rate High
During a mission, there is only read access to these registers. Bits cells marked "0" always read 0 and cannot be
written to 1.
TEMPERATURE CONVERSION
The DS1923 measures temperatures in the range of -20°C to +85°C. Temperature values are represented as a 8-
or 16-bit unsigned binary number with a resolution of 0.5°C in the 8-bit mode and 0.0625°C in the 16-bit mode.
The higher temperature byte TRH is always valid. In the 16-bit mode only the three highest bits of the lower byte
TRL are valid. The five lower bits all read zero. TRL is undefined if the device is in 8-bit temperature mode. An out-
of-range temperature reading is indicated as 00h or 0000h when too cold and FFh or FFE0h when too hot.
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相關代理商/技術參數(shù) |
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| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog RoHS:否 存儲類型:SRAM 存儲容量: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 存儲類型:SRAM 存儲容量: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 存儲類型:SRAM 存儲容量: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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