參數(shù)資料
型號(hào)： DS2406P
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(chǔ)器
文件頁數(shù)： 27/30頁
文件大?。?/td> 156K
代理商： DS2406P
DS2406
27 of 30
initial pass through the Extended Read Memory flow chart the 16-bit CRC value is the result of shifting
the command byte into the cleared CRC generator, followed by the two address bytes and the Redirection
Byte. Subsequent passes through the Extended Read Memory flow chart will generate a 16-bit CRC that
is the result of clearing the CRC generator and then shifting in only the Redirection Byte.
When writing to the DS2406 (either data memory or status memory), the bus master receives a 16-bit
CRC to verify that the data transfer was correct before applying the programming pulse. With the initial
pass through the Write Memory/Status flow chart the 16-bit CRC will be generated by clearing the CRC-
generator, shifting in the command, low address, high address and the data byte. Subsequent passes
through the Write Memory/ Status flow chart due to the DS2406 automatically incrementing its address
counter will generate a 16-bit CRC that is the result of loading (not shifting) the new (incremented)
address into the CRC generator and then shifting in the new data byte.
When communicating with a PIO channel using the Channel Access command, one can select whether
and how often a 16-bit CRC will be added to the data stream. This CRC selection is specified in the
Channel Control byte 1 and may be changed with every execution of the Channel Access command.
Depending on the CRC selection, the device can generate a CRC after every byte that follows the
Channel Info byte, after each block of eight bytes or after each block of 32 bytes. If the CRC is enabled,
with the initial pass through the Channel Access flow chart the 16-bit CRC will be generated by clearing
the CRC-generator, shifting in the command, Channel Control Bytes 1 and 2, Channel Info Byte and the
specified amount of data bytes (1, 8 or 32). Subsequent passes through the Channel Access flow chart
will generate a 16-bit CRC that is the result of clearing the CRC generator and then shifting in the new
data byte(s). This algorithm is valid for all accesses to the PIO channels, continuous reading or writing as
well as toggling between read and write.
The comparison of CRC values and decision to continue with an operation are determined entirely by the
bus master. There is no circuitry on the DS2406 that prevents a command sequence from proceeding if a
CRC error occurs. For more details on generating CRC values including example implementations in
both hardware and software, see the “Book of DS19xx iButton Standards”.
CRC-16 HARDWARE DESCRIPTION AND POLYNOMIAL
Figure 17
Polynomial = X
16
+ X
15
+ X
2
+ 1
INPUT DATA
R
X
2
X
1
X
0
X
8
X
7
X
6
X
5
X
4
X
3
8TH
STAGE
7TH
STAGE
6TH
STAGE
5TH
STAGE
4TH
STAGE
3RD
STAGE
2ND
STAGE
1ST
STAGE
S
X
15
X
14
X
13
X
12
X
11
X
10
X
9
9TH
STAGE
10TH
STAGE
11TH
STAGE
12TH
STAGE
13TH
STAGE
14TH
STAGE
15TH
STAGE
16TH
STAGE
CRC
OUTPUT
X
16
相關(guān)PDF資料
PDF描述
DS2406T Dual Addressable Switch Plus 1K-Bit Memory
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
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS2406P/R 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Dual Addressable Switch Plus 1kbit Memory
DS2406P/T 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:Dual Addressable Switch Plus 1kbit Memory
DS2406P/T&R 制造商:Maxim Integrated Products 功能描述:IC SW DL ADDRESS W/1K MEM 6-TSOC
DS2406P/T&R 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
DS2406P/TR 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Peripheral IC
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