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参数资料
| 型号： | DS1621V/T&R |
| 厂商： | Maxim Integrated |
| 文件页数： | 10/16页 |
| 文件大小： | 337K |
| 描述： | IC THERMOMETER/STAT DIG 8-SOIC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 功能： | 温度计，恒温计 |
| 传感器类型： | 内部 |
| 感应温度： | -55°C ~ 125°C |
| 精确度： | ±2°C（最小值） |
| 拓扑： | ADC（三角积分型），比较器，寄存器库 |
| 输出类型： | I²C?/SMBus? |
| 输出警报： | 是 |
| 输出风扇： | 无 |
| 电源电压： | 2.7 V ~ 5.5 V |
| 工作温度： | -55°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 带卷 (TR) |
DS1621
10 of 16
COMMAND SET
Data and control information is read from and written to the DS1621 in the format shown in Figure 5. To
write to the DS1621, the master will issue the slave address of the DS1621 and the R/
W bit will be set to
0 . After receiving an acknowledge, the bus master provides a command protocol. After receiving this
protocol, the DS1621 will issue an acknowledge and then the master may send data to the DS1621. If the
DS1621 is to be read, the master must send the command protocol as before and then issue a repeated
START condition and the control byte again, this time with the R/
W bit set to 1 to allow reading of the
data from the DS1621. The command set for the DS1621 as shown in Table 3 is as follows:
Read Temperature [AAh]
This command reads the last temperature conversion result. The DS1621 will send 2 bytes, in the format
described earlier, which are the contents of this register.
Access TH [A1h]
If R/
W is 0 this command writes to the TH (HIGH TEMPERATURE) register. After issuing this
command, the next 2 bytes written to the DS1621, in the same format as described for reading
temperature, will set the high temperature threshold for operation of the T
OUT
output. If R/
W is 1 the
value stored in this register is read back.
Access TL [A2h]
If R/
W is 0 this command writes to the TL (LOW TEMPERATURE) register. After issuing this
command, the next 2 bytes written to the DS1621, in the same format as described for reading
temperature, will set the high temperature threshold for operation of the T
OUT
output. If R/
W is 1 the
value stored in this register is read back.
Access Config [ACh]
If R/
W is 0 this command writes to the configuration register. After issuing this command, the next
data byte is the value to be written into the configuration register. If R/
W is 1 the next data byte read is
the value stored in the configuration register.
Read Counter [A8h]
This command reads the value Count_Remain. This command is valid only if R/
W is 1 .
Read Slope [A9h]
This command reads the value Count_Per_C. This command is valid only if R/
W is 1 .
Start Convert T [EEh]
This command begins a temperature conversion. No further data is required. In one-shot mode the
temperature conversion will be performed and then the DS1621 will remain idle. In continuous mode this
command will initiate continuous conversions.
Stop Convert T [22h]
This command stops temperature conversion. No further data is required. This command may be used to
halt a DS1621 in continuous conversion mode. After issuing this command, the current temperature
measurement will be completed and the DS1621 will remain idle until a Start Convert T is issued to
resume continuous operation.
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