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NET2890 Datasheet(PDF) 36 Page - List of Unclassifed Manufacturers

No. de pieza NET2890
Descripción Electrónicos  USB Interface Controller
PDF  73 Pages
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Fabricante Electrónico  ETC [List of Unclassifed Manufacturers]
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NET2890 Datasheet(HTML) 36 Page - List of Unclassifed Manufacturers

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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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