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参数资料
| 型号： | DS1923-F5# |
| 厂商： | Maxim Integrated |
| 文件页数： | 24/55页 |
| 文件大小： | 0K |
| 描述： | IBUTTON TEMP/HUMIDITY LOGGER 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： | 5 |
| 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) |
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DS1923
iButton Hygrochron Temperature/Humidity
Logger with 8KB Data-Log Memory
Device Samples Counter Register Bitmap
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
0223h
0224h
0225h
Low Byte
Center Byte
High Byte
Note: There is only read access to this register.
Device Configuration Register Bitmap
ADDRESS
0226h
BIT 7
0
0
0
0
1
BIT 6
0
0
1
1
0
BIT 5
0
1
0
1
0
BIT 4
0
0
0
0
0
BIT 3
0
0
0
0
0
BIT 2
0
0
0
0
0
BIT 1
0
0
0
0
0
BIT 0
0
0
0
0
0
PART
DS2422
DS1923
DS1922L
DS1922T
DS1922E
Note: There is only read access to this register.
Password Control Register Bitmap
ADDRESS
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
0227h
Note: During a mission, there is only read access to this register.
Other Indicators
The Device Samples Counter register is similar to the
Mission Samples Counter register. During a mission this
counter increments whenever the DS1923 wakes up to
measure and log data and when the device is testing
for a temperature alarm in Start Mission Upon
Temperature Alarm mode. Between missions, the
counter increments whenever the Forced Conversion
command is executed. This way the Device Samples
Counter register functions like a gas gauge for the bat-
tery that powers the iButton device.
The Device Samples Counter register is reset to zero
when the iButton device is assembled. The number for-
mat is 24-bit unsigned integer. The maximum number
that can be represented in this format is 16,777,215.
Due to the calibration and tests at the factory, new
devices can have a count value of up to 35,000. The
typical value is well below 10,000.
The code in the Device Configuration register allows the
master to distinguish between the DS2422 chip and dif-
ferent versions of the DS1922 devices. The Device
Configuration Register Bitmap table shows the codes
assigned to the various devices.
24
EPW
Security by Password
The DS1923 is designed to use two passwords that
control read access and full access. Reading from or
writing to the scratchpad as well as the Forced
Conversion command does not require a password.
The password must be transmitted immediately after
the command code of the memory or control function. If
password checking is enabled, the password transmit-
ted is compared to the passwords stored in the device.
The data pattern stored in the Password Control regis-
ter determines whether password checking is enabled.
To enable password checking, the EPW bits need to
form a binary pattern of 10101010 (AAh). The default
pattern of EPW is different from AAh. If the EPW pattern
is different from AAh, any pattern is accepted as long
as it has a length of exactly 64 bits. Once enabled,
changing the passwords and disabling password
checking requires the knowledge of the current full-
access password.
Maxim Integrated
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1923-F5# | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog 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 |
| DS1923-F5#W | 功能描述:iButton Hygrochron Temp/Hum Logger w/8KB DataLog 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 |
| DS1923-F5+ | 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 |
| DS19310 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:Color TV Owners Manual Manuel dinstructions du teleouleur Color TV Manual Del Propietario |
| DS193-K | 制造商:Miyama Electric 功能描述: |
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