net2890 ETC-unknow, net2890 Datasheet - Page 10

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

Specification
NET2888/NET2890 Differences
The NET2890 was derived from the NET2888. Following is a list of differences between the devices.
1.4.1 Pin Changes
1.4.2 Register Changes
1.4.3 Functional Changes
1.5 Changes From Rev 1 to Rev 2
The following changes have been made to the NET2890 from Revision 1 to Revision 2.
1.5.1 Pin Changes
None.
1.5.2 Register Changes
MAPSEL
MAINCTL
DMACTL
IRQSTAT1
IRQSTAT2
IDXDATA2
MAPDATA1
MAPDATA2
____________________________________________________________________________________
Pin 2 becomes SOF# output
ISO# (pin 29) becomes No-Connect
Completely re-defined register set.
The USB protocol, including Endpoint 0, is now managed by the local CPU.
Endpoints are now configurable.
Automatic retry of failed packets.
Renamed PAGESEL.
Bits re-arranged to simplify software:
The “Bus-Powered” bit has inverted polarity to “Self-Powered”. See the description in Section
5, Registers.
Retry Enable added to bit 4.
Bits 2:0 select Endpoints 0,A-D instead of FIFO.
Moved SOF interrupt to bit 7 (from old IRQSTAT3 bit 0).
Removed Interrupt Status 3 (bit 6).
FIFO interrupts moved into EPIRQSTAT register.
New interrupt status bits incorporated.
Removed
Removed.
Removed
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
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