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参数资料
| 型号： | DS1921H-F5# |
| 厂商： | Maxim Integrated |
| 文件页数： | 23/45页 |
| 文件大小： | 0K |
| 描述： | IBUTTON THERMOCHRON F5 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| RoHS指令信息： | IButton RoHS Compliance Plan |
| 标准包装： | 8 |
| 系列： | iButton® |
| 存储容量： | 512B |
| 存储器类型： | NVSRAM（非易失 SRAM） |
| 产品目录页面： | 1431 (CN2011-ZH PDF) |
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DS1921H/Z
Mission Start and Logging Process
The DS1921H/Z does not use a special command to start a mission. Instead, a mission is started by
writing a non-zero value to the Sample Rate Register using the Copy Scratchpad command. As shown in
Figure 11, a new mission can only be started if the previous mission has been stopped (MIP = 0), the
memory is cleared (MEMCLR = 1) and the mission is enabled (EM = 0). If the new sample rate is
different from zero, the value will be copied to the sample rate register. At the same time the MIP bit will
be set and the MEMCLR bit will be cleared to indicate that the device is on a mission. Next the Mission
Start Delay counter will start decrementing every minute until it is down to 0. Now the DS1921H/Z will
wait until the next minute boundary and start the logging process, which as its first action copies the
applicable RTC registers to the Mission Time Stamp.
MISSION START AND LOGGING PROCESS Figure 11
The Mission Start Process is invoked when the Copy Scratchpad function is used to set a new sample rate
by writing to the Sample Rate Register at address 020Dh. One minute after the start delay countdown is
over, the Logging Process begins and the Mission Start Process ends.
Mission Start Process
Logging Process
MIP = 1?
N
EM = 0?
Y
MEMCLR = 1
Y
New Sample
Rate = 0?
Y
DS1921 Sets MIP = 0
N
N
Y
DS1921 Copies RTC to
Mission Time Stamp
DS1921 sets Datalog
Address = 1000h
DS1921 Measures
Temperature
DS1921 Updates His-
togram, Device Sam-
ples Counter, Mission
Samples Counter and
Alarm, if applicable
Y
DS1921 Stores Temp.
N
N
DS1921 Copies new
Sample Rate from
Scratchpad to Sample
Rate Register
DS1921 sets MIP = 1;
MEMCLR = 0
Start Delay
Counter = 0?
N
MIP = 1?
Y
DS1921 Waits Until
Next Minute Boundary
Y
N
DS1921 Waits
Until Next
Minute
Boundary
DS1921
Logging
Process
N Y
RO = 1?
Datalog
Address =
1800h?
N
DS1921 Stores Temp. at Datalog Address
at Datalog Address
DS1921 Increments
DS1921 Increments lower 11 bits of
Datalog Address Datalog Address
DS1921 Waits Y
One Sample MIP = 1?
Period
End of Process
DS1921 Decrements
Start Delay Counter
End of Process
23 of 45
相关PDF资料 |
PDF描述 |
|---|---|
| DS1921K# | KIT IBUTTON THERMOCHRON |
| DS1922E-F5# | IBUTTON TEMP LOGGER 4KBit F5 |
| DS1922L-F5# | IBUTTON TEMP LOGGER |
| DS1923-F5# | IBUTTON TEMP/HUMIDITY LOGGER F5 |
| DS1961S-F3# | IBUTTON EEPROM 1KBit F3 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1921H-F5# | 功能描述:iButton Thermochron High Res iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921H-F5/A1C | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921H-F5+A1C | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921H-F50 | 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated |
| DS1921K | 功能描述:存储器 IC 开发工具 RoHS:否 制造商:STMicroelectronics 产品:Reference Boards 工具用于评估:M24LR64-R 存储容量:64 kbit 存储类型:EEPROM 工作电源电压:1.8 V to 5.5 V |
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