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參數(shù)資料
型號(hào)： W81C280
廠商： WINBOND ELECTRONICS CORP
元件分類(lèi)： 微控制器/微處理器
英文描述： USB Keyboard/ Device Controller(具有通用串行總線接口的鍵盤(pán)／設(shè)備控制器)
中文描述： 8-BIT, MROM, MICROCONTROLLER, PDIP40
封裝： DIP-40
文件頁(yè)數(shù)： 19/27頁(yè)
文件大小： 328K
代理商： W81C280
W81C280
Publication Release Date: July 1997
- 15 -
Revision 0.50
Writing 2 bytes of data to the FIFO and letting the W81C280 generate the CRC's by H/W
ST 1110 1000 AW 0110 0001 AW SYNC(80H) AW DATAx PID AW
DATA
AW
DATA
AW 1111 1111 AW SP
11101000= the serial bus's Write Address 1111 1111=Stop Byte
Writing 2 bytes of data to the FIFO and having the W81C280 generate the CRC's by F/W
ST 1110 1000 AW
01h
AW SYNC(80H) AW DATAx PID AW
DATA
AW
DATA
AW
CRC
AW
CRC
AW 1111 1111 AW SP
6.4.3 Writing To The USB Endpoint 1 - 4
Endpoint 1 - 4 are used for USB Interrupt transfers. The FIFOs are set for a maximum data packet
size of 8 bytes. That is, it can store 8 bytes of data plus sync, PID, and the 2 CRC bytes (unless the it
is chosen that the W81C280 generates the CRC's by H/W.) The CRC's can be generated by the
W81C280 by including the number of data bytes to be sent in the high nibble of the memory select
byte. The data sent also requires one stop byte of FFh. The data written to this FIFO will be sent to
the host via the USB bus (DP,DM) after the writing is completed and when a token packet is received
from the PC with the correct address/endpoint, and an IN PID. If no data is present in the FIFO, a
NAK PID will be sent to the host when the above condition occurs.
The W81C280 will convert the data to the USB protocol of NRZI, bit stuffing, and LSB first. Once the
data is sent, the FIFO is emptied until new data is written to it.
Writing 8 bytes of data to the FIFO and having the W81C280 generate the CRC's BY F/W
ST 1110 1000 AW 0000 xx10 AW SYNC(80H) AW DATA1 PID AW
DATA0
AW
DATA1
AW
DATA2
AW
DATA3
AW
DATA4
AW
DATA5
AW
DATA6
AW
DATA7
AW
CRC
AW
CRC
AW 1111 1111 AW SP
Writing 8 bytes of data to the FIFO and letting the W81C280 generate the CRC's by H/W
ST 1110 1000 AW 0010 xx10 AW SYNC(80H) AW DATA1 PID AW
DATA0
AW
DATA1
AW
DATA2
AW
DATA3
AW
DATA4
AW
DATA5
AW
DATA6
AW
DATA7
AW 1111 1111 AW SP
XX = 00(EP1); 01(EP2); 10(EP3); 11(EP4)
相關(guān)PDF資料
PDF描述
W81E381 FULL SPEED USB INTEGRATED MICROCONTROLLER
W81E381AD FULL SPEED USB INTEGRATED MICROCONTROLLER
W81E381D FULL SPEED USB INTEGRATED MICROCONTROLLER
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W81E381 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:FULL SPEED USB INTEGRATED MICROCONTROLLER
W81E381AD 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:FULL SPEED USB INTEGRATED MICROCONTROLLER
W81E381D 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:FULL SPEED USB INTEGRATED MICROCONTROLLER
W-82 制造商:Hozan Tool Industrial Co Ltd 功能描述: 制造商:Curtis Industries 功能描述:DIN RAIL SLOTTED
W820 制造商:LUMINIS 制造商全稱(chēng):LUMINIS 功能描述:Post top mount
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