net2890 ETC-unknow, net2890 Datasheet - Page 36

• Manufacturer Part Number: net2890
• Description: Interface Controller
• Manufacturer: ETC-unknow

Specification
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
0Dh-0Fh
0Ah
0Bh
0Ch
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
335 Pioneer Way, Mountain View, California 94041
PKTLENMSB
PKTLENLSB
IRQSTAT1
IRQSTAT2
MAINCTL
IDXADDR
IDXDATA
PAGESEL
DMACTL
Register
TEL [phone] FAX [phone]
Name
NetChip Technology, Inc., 1999
Rev 2.0, Draft 9, July 16, 1999
http://www.netchip.com
Paged Register Select
Main Control
DMA Control
Interrupt Request Status 1
Interrupt Request Status 2
Reserved
Indexed Register Address
Indexed Register Data
Reserved
Reserved
Reserved
Packet Length (LSB)
Packet Length (MSB)
Reserved
Register Description
NET2890 USB Interface Controller
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