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参数资料
| 型号： | DS2480B+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 2/32页 |
| 文件大小： | 0K |
| 描述： | IC LINE DRVR W/SENSOR 1-W 8-SOIC |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 100 |
| 类型： | 线路驱动器，发射器 |
| 驱动器/接收器数： | 1/0 |
| 规程： | RS232 |
| 电源电压： | 4.5 V ~ 5.5 V |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 管件 |
| 产品目录页面： | 1429 (CN2011-ZH PDF) |
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DS2480B
Maxim Integrated........................................................................................................................................................................................... 10
The type of time slot b2 (write 1 or write 0) is determined by the DS2480B as follows:
b2
= rn if conflict (as chosen by the host)
= b0 if no conflict (there is no alternative)
= 1 if error (there is no response)
The response the host will receive during a complete pass through a Search ROM function using the
Search Accelerator consists of 16 bytes as follows:
first byte
7
6
5
4
3
2
1
0
r’3
d3
r’2
d2
r’1
d1
r’0
d0
et cetera
16th byte
7
6
5
4
3
2
1
0
r’63
d63
r’62
d62
r’61
d61
r’60
d60
As before, the index (values from 0 to 63, “n”) designates the position of the bit in the ROM ID of a
1-Wire/iButton device. The character “d” marks the discrepancy flag in that particular bit position. The
discrepancy flag will be 1 if there is a conflict, or no response in that particular bit position, and 0
otherwise. The character “r” marks the actually chosen path at that particular bit position. The chosen
path is identical to b2 for the particular bit position of the ROM ID.
To perform a Search ROM sequence one starts with all bits rn being 0s. In case of a bus error, all
subsequent response bits r’n are 1s until the Search Accelerator is deactivated. Thus, if r’63 and d63 are both
1, an error has occurred during the search procedure and the last sequence has to be repeated. Otherwise
r’n (n = 0 ... 63) is the ROM code of the device that has been found and addressed.
For the next Search ROM sequence one reuses the previous set rn (n = 0 ... 63) but sets rm to 1 with “m”
being the index number of the highest discrepancy flag (that is, 1) and sets all ri to 0 with i > m. This
process is repeated until the highest discrepancy occurs in the same bit position for two consecutive
passes.
The table below shows an example for the communication between host and DS2480B to perform one
pass through the Search ROM function using the Search Accelerator. After a device has been identified
and addressed, a memory function (not specified here) is executed and finally a reset pulse is generated.
This example assumes that the DS2480B was in Command Mode and that standard 1-Wire speed is used.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2480B | 制造商:Maxim Integrated Products 功能描述:IC SERIAL LINE DRIVER 2480 SOIC8 |
| DS2480B/T&R | 功能描述:缓冲器和线路驱动器 RoHS:否 制造商:Micrel 输入线路数量:1 输出线路数量:2 极性:Non-Inverting 电源电压-最大:+/- 5.5 V 电源电压-最小:+/- 2.37 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Reel |
| DS2480B+ | 功能描述:缓冲器和线路驱动器 Serial - 1-Wire Line Driver RoHS:否 制造商:Micrel 输入线路数量:1 输出线路数量:2 极性:Non-Inverting 电源电压-最大:+/- 5.5 V 电源电压-最小:+/- 2.37 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:MSOP-8 封装:Reel |
| DS2480B+R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
| DS2480B+T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Serial to 1-Wire Line Driver |
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