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參數(shù)資料
| 型號： | MX53L06402L-50 |
| 廠商： | MACRONIX INTERNATIONAL CO LTD |
| 元件分類： | PROM |
| 英文描述： | FLASH 2.7V PROM CARD, XMA7 |
| 封裝： | CRAD-7 |
| 文件頁數(shù)： | 37/55頁 |
| 文件大?。?/td> | 262K |
| 代理商： | MX53L06402L-50 |
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42
P/N: PM1043
REV. 1.0, NOV. 25, 2003
MX53L06402
8 Error handling
The MX53L06402 is defined as an error free device. To protect the data against errors generated during the transport
over the MultiMediaCard bus dynamically, an additional feature is implemented: The cyclic redundancy check (CRC).
8.1 CRC
Following the MultiMediaCard standard, the MX53L06402 uses two different CRC codes to protect the data and the
command/response transfer between card and host. The CRC is intended only to detect transfer errors and not to
correct them "on the fly". If a CRC error is detected the host has to react. This is normally done by repeating the last
command.
The first CRC code is intended to protect the command and response frames. They are also used to synchronize the
data stream. This CRC is generated with and checked against the following polyno-mial:
CRC polynomial: G(x) = x 7 + x 3 + 1
M(x) = (start bit) * x 39 +...+ (last bit) * x 0
CRC[6...0] = Remainder [(M(x) * x 7 ) / G(x)]
One CRC is checked in the MX53L06402 for every command. For each response a CRC is generated in the
MX53L06402. On CRC failure the command will be ignored and a response is sent to initiate a repeti-tion of the
command by the host. Each data block read from the MX53L06402 will be succeeded by redun-dancy bits generated
with the second CRC. The code is usable for payload lengths of up to 2048 Bytes:
CRC polynomial: G(x) = x 16 + x 12 +x 5 + 1,
M(x) = (start bit) * x n + x n-1 +...+ (last bit) * x 0 , with n < 2048*8
CRC[15...0] = Remainder [(M(x) * x 16 ) / G(x)]
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相關代理商/技術參數(shù) |
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| MX54-3 | 功能描述:CUTTER SIDE OVAL FLUSH 4.25" RoHS:是 類別:工具 >> 切割機 系列:STUSA 標準包裝:1 系列:Xcelite® 類型:側面（對角） 形狀:錐形 切邊:凹槽 長度 - 總體:5.00"（127mm） 特點:安全夾 容量:20 AWG 軟線 重量:0.2 磅（90.72g） |
| MX-543/U | 制造商:Kings Electronics 功能描述: |
| MX54-9 | 功能描述:CUTTER SIDE OVAL FLUSH 4.25" RoHS:是 類別:工具 >> 切割機 系列:STUSA 標準包裝:1 系列:Xcelite® 類型:側面（對角） 形狀:錐形 切邊:凹槽 長度 - 總體:5.00"（127mm） 特點:安全夾 容量:20 AWG 軟線 重量:0.2 磅（90.72g） |
| MX54S30J | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MX-550-PSU | 制造商:Maxxtro 功能描述: |
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