收藏本站
DS1822-PAR
DS1822-PAR OPERATION EXAMPLE 1
In this example there are multiple DS1822-PARs on the bus. The bus master initiates a temperature
conversion in a specific DS1822-PAR and then reads its scratchpad and recalculates the CRC to verify
the data.
MASTER MODE
TX
RX
TX
TX
TX
TX
TX
RX
TX
TX
TX
RX
DATA (LSB FIRST)
Reset
Presence
55h
64-bit ROM code
44h
DQ line held high by
strong pullup
Reset
Presence
55h
64-bit ROM code
BEh
9 data bytes
COMMENTS
Master issues reset pulse.
DS1822-PARs respond with presence pulse.
Master issues Match ROM command.
Master sends DS1822-PAR ROM code.
Master issues Convert T command.
Master applies strong pullup to DQ for the duration of the
conversion (t conv ).
Master issues reset pulse.
DS1822-PARs respond with presence pulse.
Master issues Match ROM command.
Master sends DS1822-PAR ROM code.
Master issues Read Scratchpad command.
Master reads entire scratchpad including CRC. The master
then recalculates the CRC of the first eight data bytes from the
scratchpad and compares the calculated CRC with the read
CRC (byte 9). If they match, the master continues; if not, the
read operation is repeated.
DS1822-PAR OPERATION EXAMPLE 2
In this example there is only one DS1822-PAR on the bus. The master writes to the T H , T L , and
configuration registers in the DS1822-PAR scratchpad and then reads the scratchpad and recalculates the
CRC to verify the data. The master then copies the scratchpad contents to EEPROM.
MASTER MODE
TX
RX
TX
TX
TX
TX
RX
TX
TX
RX
TX
RX
TX
TX
TX
DATA (LSB FIRST)
Reset
Presence
CCh
4Eh
3 data bytes
Reset
Presence
CCh
BEh
9 data bytes
Reset
Presence
CCh
48h
DQ line held high by
strong pullup
COMMENTS
Master issues reset pulse.
DS1822-PAR responds with presence pulse.
Master issues Skip ROM command.
Master issues Write Scratchpad command.
Master sends three data bytes to scratchpad (T H , T L , and config).
Master issues reset pulse.
DS1822-PAR responds with presence pulse.
Master issues Skip ROM command.
Master issues Read Scratchpad command.
Master reads entire scratchpad including CRC. The master then
recalculates the CRC of the first eight data bytes from the
scratchpad and compares the calculated CRC with the read CRC
(byte 9). If they match, the master continues; if not, the read
operation is repeated.
Master issues reset pulse.
DS1822-PAR responds with presence pulse.
Master issues Skip ROM command.
Master issues Copy Scratchpad command.
Master applies strong pullup to DQ for at least 10 ms while copy
operation is in progress.
16 of 19
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
DS1822Z/T&R IC THERMOMETER ECONO DIG 8-SOIC
DS1870E-010+T&R IC CNTRLR RF POWER AMP 16TSSOP
DS18S20-PAR+T&R IC THERM MICROLAN HI-PREC TO-92
DS60R+T&R IC SENSOR MICRO CENTIGRADE SOT23
DV164102 KIT DEV RFPICKIT KIT 1
DVK90109 KIT DEV FOR MLX90109
DVK90121 KIT DEV FOR MLX90121
DXP18CN7515TL COUPLER FILM 75 OHM 0603
相关代理商/技术参数
DS1822+T 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Econo 1-Wire Digital Thermometer
DS1822+T&R 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 THERMOMETER ECONO DIG TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors 1-Wire Digital Thermometer
DS1822+T&R 功能描述:板上安装温度传感器 1-Wire Digital Thermometer 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
DS1822-PAR 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
DS1822-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
DS1822-PAR_07 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:Econo 1-Wire Parasite-Power Digital Thermometer
DS1822-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 THERMOMETER ECONO DIG TO-92 制造商:Maxim Integrated Products 功能描述:Board Mount Temperature Sensors 1-Wire Digital Thermometer
DS1822-PAR+T&R 功能描述:板上安装温度传感器 1-Wire Digital Thermometer 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