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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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NET2890 数据表(PDF) 52 Page - List of Unclassifed Manufacturers |
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NET2890 数据表(HTML) 52 Page - List of Unclassifed Manufacturers |
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52 / 73 page  Specification NET2890 USB Interface Controller ____________________________________________________________________________________ NetChip Technology, Inc., 1999 335 Pioneer Way, Mountain View, California 94041 TEL (650) 526-1490 FAX (650) 526-1494 http://www.netchip.com Rev 2.0, Draft 9, July 16, 1999 52 5.6.7 (Index 0Ch; DIAG) Diagnostic Register Bits Description Read Write Default Value 7:4 Reserved Yes No 0 3 Simulated Disconnect. When this bit is set, the NET2890 will drive the USB data lines to the “disconnected” state. The local CPU should ensure that this bit is set for at least 3 milliseconds to simulate a proper disconnect event. Yes Yes 0 2 Force Receive Error. When this bit is set, an error is forced on the next received data packet. As a result, the packet will not be acknowledged. This bit is automatically cleared at the end of the next packet. Yes Yes/Set 0 1 Prevent Transmit Bit-Stuff. When this bit is set, normal bit-stuffing is suppressed during the next transmitted data packet. This will cause a bit-stuffing error when six or more consecutive bits of ‘1’ are in the data stream. This bit is automatically cleared at the end of the next packet. Yes Yes/Set 0 0 Force Transmit CRC Error. When this bit is set, a CRC error is forced on the next transmitted data packet. The CRC error is generated by inverting the most significant bit of the calculated CRC. This bit is automatically cleared at the end of the next packet. Yes Yes/Set 0 5.6.8 (Index 10h; EP0PKTSIZLSB) EP0 Max Packet Size (LSB) Bits Description Read Write Default Value 7:0 EP0 Max Packet Size LSB. This field provides the least significant bits of the Endpoint 0 Maximum Packet Size. Yes Yes 8 5.6.9 (Index 12h; EPAPKTSIZLSB) EPA Max Packet Size (LSB) Bits Description Read Write Default Value 7:0 EPA Max Packet Size LSB. This field provides the least significant bits of the Endpoint A Maximum Packet Size. Yes Yes 64 5.6.10 (Index 13h; EPAPKTSIZMSB) EPA Max Packet Size (MSB) Bits Description Read Write Default Value 7:2 Reserved Yes No 0 1:0 EPA Max Packet Size MSB. This field provides the most significant bits of the Endpoint A Maximum Packet Size. Yes Yes 0 5.6.11 (Index 14h; EPBPKTSIZLSB) EPB Max Packet Size (LSB) Bits Description Read Write Default Value 7:0 EPB Max Packet Size LSB. This field provides the least significant bits of the Endpoint B Maximum Packet Size. Yes Yes 64 |
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