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参数资料
| 型号： | DS1923-F5# |
| 厂商： | Maxim Integrated |
| 文件页数： | 28/55页 |
| 文件大小： | 0K |
| 描述： | IBUTTON TEMP/HUMIDITY LOGGER 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： | 5 |
| 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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DS1923
iButton Hygrochron Temperature/Humidity
Logger with 8KB Data-Log Memory
The last step to begin a mission is to issue the Start
Mission command. As soon as it has received this com-
mand, the DS1923 sets the MIP flag and clears the
MEMCLR flag. With the immediate/delayed start mode
(SUTA = 0), after as many minutes as specified by the
Mission Start Delay are over, the device wakes up,
copies the current date and time to the Mission
Timestamp register, and logs the first entry of the mis-
sion. This increments both the Mission Samples
Counter and Device Samples Counter. All subsequent
log entries are made as specified by the value in the
Sample Rate register and the EHSS bit.
If the start upon temperature alarm mode is chosen
(SUTA = 1) and temperature logging is enabled (ETL =
1), the DS1923 first waits until the start delay is over.
Then the device wakes up in intervals as specified by
the sample rate and EHSS bit and measures the tem-
perature. This increments the Device Samples Counter
register only. The first sample of the mission is logged
when the temperature alarm occurred. However, the
Mission Samples Counter does not increment. One
sample period later the Mission Timestamp register is
set. From then on, both the Mission Samples Counter
and Device Samples Counter registers increment at the
same time. All subsequent log entries are made as
specified by the value in the Sample Rate register and
the EHSS bit.
The general-purpose memory operates independently of
the other memory sections and is not write protected
during a mission. All the DS1923’s memory can be read
at any time, e.g., to watch the progress of a mission.
Attempts to read the passwords read 00h bytes instead
of the data that is stored in the password registers.
Memory Access
Address Registers and Transfer Status
Because of the serial data transfer, the DS1923
employs three address registers called TA1, TA2, and
E/S (Figure 8). Registers TA1 and TA2 must be loaded
with the target address to which the data is written or
from which data is sent to the master upon a read com-
mand. Register E/S acts like a byte counter and trans-
fer status register. It is used to verify data integrity with
write commands. Therefore, the master only has read
access to this register. The lower 5 bits of the E/S regis-
ter indicate the address of the last byte that has been
written to the scratchpad. This address is called ending
offset. The DS1923 requires that the ending offset is
always 1Fh for a Copy Scratchpad to function. Bit 5
of the E/S register, called PF or partial byte flag, is set if
the number of data bits sent by the master is not an
integer multiple of 8. Bit 6 is always a 0. Note that the
lowest 5 bits of the target address also determine the
address within the scratchpad, where intermediate
storage of data begins. This address is called byte off-
set. If the target address for a Write Scratchpad com-
mand is 13Ch, for example, the scratchpad stores
incoming data beginning at the byte offset 1Ch and is
full after only 4 bytes. The corresponding ending offset
in this example is 1Fh. For best economy of speed and
BIT NUMBER
TARGET ADDRESS (TA1)
TARGET ADDRESS (TA2)
7
T7
T15
6
T6
T14
5
T5
T13
4
T4
T12
3
T3
T11
2
T2
T10
1
T1
T9
0
T0
T8
ENDING ADDRESS WITH
DATA STATUS (E/S)
AA
0
PF
E4
E3
E2
E1
E0
(READ ONLY)
Figure 8. Address Registers
28
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog 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 |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog 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 |
| DS1923-F5+ | 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 |
| DS19310 | 制造商:SANYO 制造商全称: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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