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参数资料
| 型号： | DS1920-F5+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 9/22页 |
| 文件大小： | 0K |
| 描述： | IBUTTON TEMPERATURE F5 |
| 产品培训模块： | Obsolescence Mitigation Program |
| RoHS指令信息： | IButton RoHS Compliance Plan |
| 标准包装： | 25 |
| 系列： | iButton® |
| 存储容量： | 2B |
| 存储器类型： | EEPROM |
DS1920
1-Wire BUS SYSTEM
The 1-Wire bus is a system that has a single bus master and one or more slaves. The DS1920 behaves as a
slave. The discussion of this bus system is broken down into three topics: hardware configuration,
transaction sequence, and 1-Wire signaling (signal types and timing).
HARDWARE CONFIGURATION
The 1-Wire bus has only a single line by definition; it is important that each device on the bus be able to
drive it at the appropriate time. To facilitate this, each device attached to the 1-Wire bus must have open-
drain or 3-state outputs. The 1-Wire port of the DS1920 (data contact) is open drain with an internal
circuit equivalent to that shown in Figure 8. A multidrop bus consists of a 1-Wire bus with multiple
slaves attached. The 1-Wire bus requires a pullup resistor of approximately 5k ? . The idle state for the
1-Wire bus is high. If for any reason a transaction needs to be suspended, the bus MUST be left in the idle
state if the transaction is to resume. If this does not occur and the bus is left low for more than 120 μ s, one
or more of the devices on the bus will be reset.
HARDWARE CONFIGURATION Figure 8
TRANSACTION SEQUENCE
The protocol for accessing the DS1920 via the 1-Wire port is as follows:
?
?
?
?
Initialization
ROM Function Command
Memory/Control Function Command
Transaction/Data
INITIALIZATION
All transactions on the 1-Wire bus begin with an initialization sequence. The initialization sequence
consists of a reset pulse transmitted by the bus master followed by presence pulse(s) transmitted by the
slave(s).
The presence pulse lets the bus master know that the DS1920 is on the bus and is ready to operate. For
more details, see the 1-Wire Signaling section.
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相关PDF资料 |
PDF描述 |
|---|---|
| DS1921G-F5# | IBUTTON THERMOCHRON F5 |
| DS1921H-F5# | IBUTTON THERMOCHRON F5 |
| DS1921K# | KIT IBUTTON THERMOCHRON |
| DS1922E-F5# | IBUTTON TEMP LOGGER 4KBit F5 |
| DS1922L-F5# | IBUTTON TEMP LOGGER |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1920-F5+ | 功能描述:iButton Temperature 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 |
| DS1921 | 制造商:DALLAS 制造商全称:Dallas Semiconductor 功能描述:High-Resolution Thermochron iButton |
| DS1921G | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Thermochron iButton |
| DS1921G_11 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Logs Up to 2048 Consecutive Temperature Thermochron iButton |
| DS1921G_1109 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Thermochron iButton |
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