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參數資料
| 型號： | W812 |
| 英文描述： | Controller Miscellaneous - Datasheet Reference |
| 中文描述： | 控制器雜項-數據表參考 |
| 文件頁數： | 8/12頁 |
| 文件大?。?/td> | 99K |
| 代理商： | W812 |
I
W812 IEEE 1394 Link Layer Controller
I
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6
Oki Semiconductor
Packet header check and decoding
Coordinate function with optional FIFO controller
Packet flow control for transmission and receiving
Byte-wide Serializer and Deserializer
During transmission, this block serializes an 8-bit byte into appropriate size of data according to the asso-
ciated transmission speed. During receiving, this block accumulates receiving data, deserialzies it, and
passes data one byte at a time to the Quadlet Serializer and Deserializer. This block also generates signal
pertaining to the Annex J states like start and end of a receive, states during transmit or receive. It controls
when to read and or write a byte from or to the Quadlet Serializer and Desirializer and when to compute
new CRC.
Quadlet Serializer and Deserializer
During transmission, this block serializes 32-bit data into four 1-byte data. During receiving, this block
deserialzies four 1-byte data at a time into a 32-bit quadlet.
Quadlet Buffer
This block is a FIFO-type storage area.
Link Core Controller State Machine
This machine performs link layer packet transmit and receive operations as described in Figure 6-19, of
IEEE Standard 1394-1995
.
CRC Generator and Checker
This block generates and checks the CRC. The 32-bit polynomial function is as follows:
G(x) = x(32) + x(26) + x(23) + x(22) + x(16) + x(12) + x(11) + x(10) + x(8) + x(7) + x(5) + x(4) + x(2) + x + 1
To run the W812 at 400 Mbps, this block uses a specialized scheme to achieve desired performance.
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相關代理商/技術參數 |
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| W81281 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:USB Keyboard/ Device Controller |
| W81282F | 制造商:WINBOND 制造商全稱:Winbond 功能描述:USB Keyboard Controller with 4 Ports Hub |
| W81282F-05 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:USB Keyboard Controller with 4 Ports Hub |
| W81386D | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Winbond USB Interface MS/SD/MMC Reader |
| W81386-DG | 制造商:WINBOND 制造商全稱:Winbond 功能描述:Winbond USB Interface MS/SD/MMC Reader |
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