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參數(shù)資料
| 型號(hào)： | DS1825UTR |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID |
| 中文描述： | 可編程的1 - Wire數(shù)字溫度計(jì)，具有4位ID |
| 文件頁(yè)數(shù)： | 12/21頁(yè) |
| 文件大?。?/td> | 298K |
| 代理商： | DS1825UTR |
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DS1825 Programmable Resolution 1-Wire Digital Thermometer With 4-Bit ID
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READ SCRATCHPAD [BEh]
This command allows the master to read the contents of the scratchpad. The data transfer starts with the least
significant bit of byte 0 and continues through the scratchpad until the 9
byte (byte 8: CRC) is read. The master
may issue a reset to terminate reading at any time if only part of the scratchpad data is needed.
COPY SCRATCHPAD [48h]
This command copies the contents of the scratchpad T
H
, T
L
and configuration registers (bytes 2, 3, and 4) to
EEPROM. If the device is being used in parasite power mode, within 10 s (max) after this command is issued the
master must enable a strong pullup on the 1-Wire bus for at least 10ms as described in the
POWERING THE
DS1825
section.
RECALL E
2
[B8h]
This command recalls the alarm trigger values (T
H
and T
L
) and configuration data from EEPROM and places the
data in bytes 2, 3, and 4, respectively, in the scratchpad memory. The master device can issue read time slots
following the Recall E
2
command and the DS1825 will indicate the status of the recall by transmitting 0 while the
recall is in progress and 1 when the recall is done. The recall operation happens automatically at power-up, so
valid data is available in the scratchpad as soon as power is applied to the device.
READ POWER SUPPLY [B4h]
The master device issues this command followed by a read time slot to determine if any DS1825s on the bus are
using parasite power. During the read time slot, parasite powered DS1825s will pull the bus low, and externally
powered DS1825s will let the bus remain high. Refer to the
POWERING THE DS1825
section for usage
information for this command.
Table 5. DS1825 FUNCTION COMMAND SET
Command
Description
Protocol
1-Wire Bus Activity
After Command is Issued
Notes
TEMPERATURE CONVERSION COMMANDS
Convert T
Initiates temperature
conversion.
44h
DS1825 transmits conversion status
to master (not applicable for
parasite-powered DS1825s).
1
MEMORY COMMANDS
Read Scratchpad
Reads the entire scratchpad
including the CRC byte.
Writes data into scratchpad
bytes 2, 3, and 4 (T
H
, T
L
, and
configuration registers).
Copies T
H
, T
L
, and
configuration register data
from the scratchpad to
EEPROM.
Recalls T
H
, T
L
, and
configuration register data
from EEPROM to the
scratchpad.
BEh
DS1825 transmits up to 9 data
bytes to master.
2
Write Scratchpad
4Eh
Master transmits 3 data bytes to
DS1825.
3
Copy Scratchpad
48h
None
1
Recall E
2
B8h
DS1825 transmits recall status to
master.
Read Power
Supply
NOTES:
1. For parasite-powered DS1825s, the master must enable a strong pullup on the 1-Wire bus during temperature
conversions and copies from the scratchpad to EEPROM. No other bus activity may take place during this
time.
2. The master can interrupt the transmission of data at any time by issuing a reset.
3. All three bytes must be written before a reset is issued.
Signals DS1825 power supply
mode to the master.
B4h
DS1825 transmits supply status to
master.
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相關(guān)代理商/技術(shù)參數(shù) |
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| DS1830 | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830+ | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830A | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830A+ | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
| DS1830AS | 功能描述:監(jiān)控電路 Reset Sequencer RoHS:否 制造商:STMicroelectronics 監(jiān)測(cè)電壓數(shù): 監(jiān)測(cè)電壓: 欠電壓閾值: 過(guò)電壓閾值: 輸出類(lèi)型:Active Low, Open Drain 人工復(fù)位:Resettable 監(jiān)視器:No Watchdog 電池備用開(kāi)關(guān):No Backup 上電復(fù)位延遲（典型值）:10 s 電源電壓-最大:5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:UDFN-6 封裝:Reel |
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