参数资料
型号: DS1921G-F5#
厂商: Maxim Integrated
文件页数: 40/42页
文件大小: 0K
描述: IBUTTON THERMOCHRON F5
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
RoHS指令信息: IButton RoHS Compliance Plan
标准包装: 8
系列: iButton®
存储容量: 512B
存储器类型: NVSRAM(非易失 SRAM)
产品目录页面: 1431 (CN2011-ZH PDF)
DS1921G
Thermochron iButton Device
Step 4: Set the temperature alarms and write the Sample Rate to start the mission
In this example, the temperature alarms are set to -5°C for the low temperature threshold and 0°C for the high tem-
perature threshold. The sample rate is once every 10min, allowing the mission to last up to 14 days. This results in
the following data to be written to the special function registers:
ADDRESS
DATA
20Bh
46h
20Ch
50h
20Dh
0Ah
With only a single DS1921G connected to the bus master, the communication of step 4 is as follows:
MASTER MODE
Tx
Rx
Tx
Tx
Tx
Tx
Tx
Tx
Rx
Tx
Tx
Rx
Rx
Rx
Rx
Tx
Rx
Tx
Tx
Tx
DATA (LSB FIRST)
(Reset)
(Presence)
CCh
0Fh
0Bh
02h
<3 data bytes>
(Reset)
(Presence)
CCh
AAh
0Bh
02h
0Dh
<3 data bytes>
(Reset)
(Presence)
CCh
55h
0Bh
COMMENTS
Reset pulse (480 μs to 960 μs)
Presence pulse
Issue Skip ROM command
Issue Write Scratchpad command
TA1, beginning offset = 0Bh
TA2, address = 020Bh
Write 3 bytes of data to scratchpad
Reset pulse
Presence pulse
Issue Skip ROM command
Issue Read Scratchpad command
Read TA1, beginning offset = 0Bh
Read TA2, address = 020Bh
Read E/S, ending offset = 0Dh, flags = 0h
Read scratchpad data and verify
Reset pulse
Presence pulse
Issue Skip ROM command
Issue Copy Scratchpad command
TA1
Tx
02h
TA2
(AUTHORIZATION CODE)
Tx
Tx
Rx
0Dh
(Reset)
(Presence)
E/S
Reset pulse
Presence pulse
If step 4 is successful, the MIP bit in the Status register is 1, the MEMCLR bit is 0, and the Mission Start Delay
counts down.
40
Maxim Integrated
相关PDF资料
PDF描述
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
相关代理商/技术参数
参数描述
DS1921G-F5# 功能描述:iButton Thermochron 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#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