參數(shù)資料
型號： DS2406T
英文描述： Dual Addressable Switch Plus 1K-Bit Memory
中文描述： 雙址開關(guān)與1K位存儲器
文件頁數(shù)： 26/30頁
文件大?。?/td> 156K
代理商： DS2406T
DS2406
26 of 30
PROGRAM PULSE TIMING DIAGRAM
Figure 16
VPP
Resistor pull-up
LINE TYPE LEGEND:
Bus master active high
(12 V @ 10 mA)
VPULLUP
GND
Normal 1-Wire
Communication Ends
480 μs
tRP
tFP
tDP
tDV
> 5 μs
> 5 μs
tPP
Normal 1-Wire
Communication Resumes
CRC GENERATION
With the DS2406 there are two different types of CRCs (Cyclic Redundancy Checks). One CRC is an 8-
bit type. It is computed at the factory and lasered into the most significant byte of the 64-bit ROM. The
equivalent polynomial function of this CRC is X
been read without error the bus master can compute the CRC value from the first 56 bits of the 64-bit
ROM and compare it to the value read from the DS2406. This 8-bit CRC is received in the true form
(non-inverted) when reading the ROM.
8
+ X
5
+ X
4
+ 1. To determine whether the ROM data has
The other CRC is a 16-bit type, generated according to the standardized CRC16-polynomial function X
+ X
when communicating with PIO channels. It is the same type of CRC as is used with NVRAM based
iButtons for error detection within the iButton Extended File Structure. In contrast to the 8-bit CRC, the
16-bit CRC is always returned in the complemented (inverted) form. A CRC-generator inside the DS2406
chip (Figure 17) will calculate a new 16-bit CRC as shown in the command flow chart of Figure 7. The
bus master may compare the CRC value read from the device to the one it calculates from the data and
decides whether to continue with an operation or to re-do the function that returned the CRC error.
16
15
+ X
2
+ 1. This CRC is used for error detection when reading Data Memory, Status Memory or
When reading the data memory of the DS2406 with the Read Memory command, the 16-bit CRC is only
transmitted at the end of the memory. This CRC is generated by clearing the CRC generator, shifting in
the command, low address, high address and every data byte starting at the first addressed memory
location and continuing until the end of the physical data memory is reached.
When reading the Status Memory, the 16-bit CRC is transmitted at the end of the 8-byte Status Memory
page. The 16-bit CRC will be generated by clearing the CRC generator, shifting in the command byte,
low address, high address and the data bytes beginning at the first addressed memory location and
continuing until the last byte of the Status Memory is reached.
When reading the data memory of the DS2406 with the Extended Read Memory command, there are two
situations where a 16-bit CRC is generated. One 16-bit CRC follows each Redirection Byte; another 16-
bit CRC is transmitted after the last byte of a memory data page is read. The CRC at the end of the
memory page is always the result of clearing the CRC generator and shifting in the data bytes beginning
at the first addressed memory location of the EPROM data page until the last byte of this page. With the
相關(guān)PDF資料
PDF描述
DS2406V Dual Addressable Switch Plus 1K-Bit Memory
DS2406X Dual Addressable Switch Plus 1K-Bit Memory
DS2407 Dual Addressable Switch Plus 1K.Bit Memory
DS2407P Dual Addressable Switch Plus 1K.Bit Memory
DS2407T Dual Addressable Switch Plus 1K.Bit Memory
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2406V 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Dual Addressable Switch Plus 1K-Bit Memory
DS2406X 功能描述:接口 - 專用 RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59
DS2407 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Dual Addressable Switch Plus 1K.Bit Memory
DS2407FP000 制造商:Thomas & Betts 功能描述:200A,CON,3P4W,MG,407,3P250V
DS2407MP000 制造商:Thomas & Betts 功能描述:200A,PLG,3P4W,MG,407,3P250V
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