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参数资料
| 型号： | DS1920-F5+ |
| 厂商： | Maxim Integrated |
| 文件页数： | 8/22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 CRC CODE Figure 6
MEMORY
The DS1920’s memory is organized as shown in Figure 7. The memory consists of a scratchpad and 2
bytes of EEPROM that store the high and low temperature triggers TH and TL. The scratchpad helps
insure data integrity when communicating over the 1-Wire bus. Data is first written to the scratchpad
where it can be read back. After the data has been verified, a copy scratchpad command will transfer the
data to the EEPROM. This process ensures data integrity when modifying the memory.
The scratchpad is organized as 8 bytes of memory. The first 2 bytes contain the measured temperature
information. The 3rd and 4th bytes are volatile copies of TH and TL and are refreshed with every power-
on reset. The next 2 bytes are not used; upon reading back, however, they will appear as all logic 1s. The
7th and 8th bytes are count registers, which may be used in obtaining higher temperature resolution (see
the Operation—Measuring Temperature section).
There is a 9th byte that may be read with a Read Scratchpad command. This byte is a cyclic redundancy
check (CRC) over all of the 8 previous bytes. This CRC is implemented as described in the CRC
Generation section.
DS1920 MEMORY MAP Figure 7
SCRATCHPAD
TEMPERATURE LSB
TEMPERATURE MSB
TH/USER BYTE 1
TL/USER BYTE 2
RESERVED
RESERVED
COUNT REMAIN
COUNT PER °C
CRC
BYTE
0
1
2
3
4
5
6
7
8
8 of 22
EEPROM
TH/USER BYTE 1
TL/USER BYTE 2
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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