参数资料
型号: DS1621+
厂商: Maxim Integrated
文件页数: 10/16页
文件大小: 337K
描述: IC THERMOMETER/STAT DIG 8-DIP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 50
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:
输出风扇:
电源电压: 2.7 V ~ 5.5 V
工作温度: -55°C ~ 125°C
安装类型: 通孔
封装/外壳: 8-DIP(0.300",7.62mm)
供应商设备封装: 8-DIP
包装: 管件
产品目录页面: 1435 (CN2011-ZH PDF)
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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