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DS1921G
Thermochron iButton Device
MISSION START PROCESS
LOGGING PROCESS
MIP = 1?
N
Y
DS1921G SETS MIP = 0
DS1921G COPIES RTC TO
MISSION TIMESTAMP
DS1921G SETS DATA-LOG
ADDRESS = 1000h
EM = 0?
Y
N
DS1921G MEASURES
TEMPERATURE
MEMCLR = 1?
Y
NEW SAMPLE
RATE = 0?
N
Y
DS1921G UPDATES HISTOGRAM,
DEVICE SAMPLES COUNTER,
MISSION SAMPLES COUNTER
AND ALARM, IF APPLICABLE
N
N
RO = 1?
Y
DS1921G COPIES NEW SAMPLE
RATE FROM SCRATCHPAD TO
SAMPLE RATE REGISTER
Y
DATA-LOG
ADDRESS = 1800h?
N
DS1921G SETS MIP = 1;
MEMCLR = 0
DS1921G STORES TEMPERATURE
AT DATA-LOG ADDRESS
DS1921G STORES TEMPERATURE
AT DATA-LOG ADDRESS
START DELAY
COUNTER = 0?
N
Y
DS1921G WAITS
DS1921G INCREMENTS
DATA-LOG ADDRESS
DS1921G INCREMENTS LOWER
11 BITS OF DATA-LOG ADDRESS
UNTIL NEXT MINUTE
MIP = 1?
N
BOUNDARY
DS1921G WAITS
ONE SAMPLE
Y
MIP = 1?
Y
DS1921G
PERIOD
N
DS1921G WAITS UNTIL NEXT
MINUTE BOUNDARY
LOGGING
PROCESS
END OF PROCESS
DS1921G DECREMENTS
START DELAY COUNTER
END OF PROCESS
NOTE: THE MISSION START PROCESS IS INVOKED WHEN THE COPY SCRATCHPAD COMMAND IS USED TO SET A NEW SAMPLE RATE BY WRITING TO THE SAMPLE RATE
REGISTER AT ADDRESS 020Dh. ONE MINUTE AFTER THE START DELAY COUNTDOWN IS OVER, THE LOGGING PROCESS BEGINS AND THE MISSION START PROCESS ENDS.
Figure 11. Mission Start and Logging Process
26
Maxim Integrated
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相关PDF资料
DS1921H-F5# IBUTTON THERMOCHRON F5
DS1921K# KIT IBUTTON THERMOCHRON
DS1922E-F5# IBUTTON TEMP LOGGER 4KBit F5
DS1922L-F5# IBUTTON TEMP LOGGER
DS1923-F5# IBUTTON TEMP/HUMIDITY LOGGER F5
DS1961S-F3# IBUTTON EEPROM 1KBit F3
DS1963S-F5+ IBUTTON MONETARY SHA-1
DS1971-F3+ IBUTTON EEPROM 256KBIT F3
相关代理商/技术参数
DS1921G-F5#W 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A0C 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A12 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A12-W 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A14 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A15 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A17 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated
DS1921G-F5/A1B 功能描述:iButton RoHS:否 存储类型:SRAM 存储容量:512 B 组织: 工作电源电压:3 V to 5.25 V 接口类型:1-Wire 最大工作温度:+ 85 C 尺寸:17.35 mm x 5.89 mm 封装 / 箱体:F5 MicroCan 制造商:Maxim Integrated