net2890 ETC-unknow, net2890 Datasheet - Page 52

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

Specification
5.6.7 (Index 0Ch; DIAG) Diagnostic Register
5.6.8 (Index 10h; EP0PKTSIZLSB) EP0 Max Packet Size (LSB)
5.6.9 (Index 12h; EPAPKTSIZLSB) EPA Max Packet Size (LSB)
5.6.10 (Index 13h; EPAPKTSIZMSB) EPA Max Packet Size (MSB)
5.6.11 (Index 14h; EPBPKTSIZLSB) EPB Max Packet Size (LSB)
Bits
Bits
Bits
Bits
Bits
____________________________________________________________________________________
7:4
7:0
7:0
7:2
1:0
7:0
3
2
1
0
Description
Reserved
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.
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.
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.
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.
Description
EP0 Max Packet Size LSB. This field provides the least significant bits of the
Endpoint 0 Maximum Packet Size.
Description
EPA Max Packet Size LSB. This field provides the least significant bits of the
Endpoint A Maximum Packet Size.
Description
Reserved
EPA Max Packet Size MSB. This field provides the most significant bits of the
Endpoint A Maximum Packet Size.
Description
EPB Max Packet Size LSB. This field provides the least significant bits of the
Endpoint B Maximum Packet Size.
335 Pioneer Way, Mountain View, California 94041
TEL [phone] FAX [phone]
NetChip Technology, Inc., 1999
Rev 2.0, Draft 9, July 16, 1999
http://www.netchip.com
NET2890 USB Interface Controller
Read
Read
Read
Read
Read
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes/Set
Yes/Set
Yes/Set
Write
Write
Write
Write
Write
Yes
Yes
Yes
Yes
Yes
No
No
Default
Default
Default
Default
Default
Value
Value
Value
Value
Value
64
64
0
0
0
0
0
8
0
0
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