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NET2890 数据表(PDF) 36 Page - List of Unclassifed Manufacturers |
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NET2890 数据表(HTML) 36 Page - List of Unclassifed Manufacturers |
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36 / 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 36 5. Configuration Registers 5.1 Register Description The NET2890 occupies a 32 byte local register space which can be accessed by a CPU on the local bus. The base registers are accessed directly, while the paged registers are paged in using the PAGESEL register. There are four sets of index registers which allow selected paged and indexed registers to be accessed directly from the Base Register range. After the NET2890 is powered-up or reset, the registers are set to their default values. Writes to unused registers are ignored, and reads from unused registers return a value of 0. For compatibility with future revisions, reserved bits within a register should always be written with a zero. 5.2 Register Summary 5.2.1 Base registers (unpaged) Address Register Name Register Description Page 00h PAGESEL Paged Register Select 39 01h MAINCTL Main Control 39 02h DMACTL DMA Control 39 03h IRQSTAT1 Interrupt Request Status 1 40 04h IRQSTAT2 Interrupt Request Status 2 40 05h Reserved 06h IDXADDR Indexed Register Address 41 07h IDXDATA Indexed Register Data 41 08h Reserved 09h Reserved 0Ah Reserved 0Bh PKTLENLSB Packet Length (LSB) 41 0Ch PKTLENMSB Packet Length (MSB) 41 0Dh-0Fh Reserved |
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