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参数资料
| 型号： | DS18S20-PAR |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | Switch/Digital Output Temperature Sensor |
| 英文描述： | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, ROUND, THROUGH HOLE MOUNT |
| 封装： | TO-92, 3 PIN |
| 文件页数： | 20/20页 |
| 文件大小： | 250K |
| 代理商： | DS18S20-PAR |
DS18S20-PAR
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read from the device without sending its 64–bit ROM code. This sequence will cause a data collision on
the bus if there is more than one slave since multiple devices will attempt to transmit data simultaneously.
ALARM SEARCH [ECh]
The operation of this command is identical to the operation of the Search ROM command except that
only slaves with a set alarm flag will respond. This command allows the master device to determine if
any DS18S20-PARs experienced an alarm condition during the most recent temperature conversion.
After every Alarm Search cycle (i.e., Alarm Search command followed by data exchange), the bus master
must return to Step 1 (Initialization) in the transaction sequence. Refer to the OPERATION – ALARM
SIGNALING section for an explanation of alarm flag operation.
DS18S20-PAR FUNCTION COMMANDS
After the bus master has used a ROM command to address the DS18S20-PAR with which it wishes to
communicate, the master can issue one of the DS18S20-PAR function commands. These commands
allow the master to write to and read from the DS18S20-PAR’s scratchpad memory, initiate temperature
conversions and determine the power supply mode. The DS18S20-PAR function commands, which are
described below, are summarized in Table 4 and illustrated by the flowchart in Figure 10.
CONVERT T [44h]
This command initiates a single temperature conversion. Following the conversion, the resulting thermal
data is stored in the temperature register, COUNT REMAIN register and COUNT PER °C register in the
scratchpad memory, and the DS18S20-PAR returns to its low-power idle state. Within 10
ms (max) after
this command is issued the master must enable a strong pullup on the 1-Wire bus for the duration of the
conversion (tconv) as described in the PARASITE POWER section.
WRITE SCRATCHPAD [4Eh]
This command allows the master to write 2 bytes of data to the DS18S20-PAR’s scratchpad. The first
byte is written into the TH register (byte 2 of the scratchpad), and the second byte is written into the TL
register (byte 3 of the scratchpad). Data must be transmitted least significant bit first. Both bytes MUST
be written before the master issues a reset, or the data may be corrupted.
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 9th byte (byte 8 – CRC) is
read. If only part of the scratchpad contents is required, the master may issue a reset to terminate reading
at any time.
COPY SCRATCHPAD [48h]
This command copies the contents of the scratchpad TH and TL registers (bytes 2 and 3) to EEPROM.
Within 10
ms (max) after this command is issued the master must enable a strong pullup on the 1-Wire
bus for at least 10 ms as described in the PARASITE POWER section.
RECALL E2 [B8h]
This command recalls the alarm trigger values (TH and TL) from EEPROM and places the data in bytes 2
and 3, respectively, in the scratchpad memory. The master device can issue “read time slots” (see the 1-
WIRE BUS SYSTEM section) following the Recall E2 command and the DS18S20-PAR 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.
相关PDF资料 |
PDF描述 |
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| DS18S20Z | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, RECTANGULAR, SURFACE MOUNT |
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| DS18S20-SL+T&R | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, RECTANGULAR, THROUGH HOLE MOUNT |
| DS18S20Z/T&R | DIGITAL TEMP SENSOR-SERIAL, 9BIT(s), 0.50Cel, RECTANGULAR, SURFACE MOUNT |
| DS1963L-F5 | SPECIALTY MEMORY CIRCUIT, MEDB2 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS18S20-PAR/T&R | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18S20-PAR+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE 3PIN TO-92 - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
| DS18S20-PAR+T&R | 功能描述:板上安装温度传感器 Prgmble Resolution 1-Wire Parasite Pwr RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18S20-SL/T&R | 功能描述:板上安装温度传感器 RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| DS18S20-SL+T&R | 制造商:Maxim Integrated Products 功能描述:TEMP SENSOR DGTL 1-WIRE - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC THERM MICROLAN HI-PREC TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors Prgmble Resolution 1-Wire Parasite Pwr |
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