Specification
NET2272 USB Peripheral Controller
______________________________________________________________________________
NetChip Technology, Inc., 2003
Patent Pending
335 Pioneer Way, Mountain View, California 94041
TEL (650) 526-1490
FAX (650) 526-1494
http://www.netchip.com
Rev 1.2, October 15, 2003
70
8.6.7 (Address 0Bh; EP_IRQENB) Endpoint Interrupt Enable Register
Bits
Description
Read
Write
Default
Value
7:5
Reserved.
0
No
0
4
Short Packet Transferred Interrupt Enable. When set, this bit enables a local
interrupt to be set when a short data packet has been transferred to/from the host.
Yes
Yes
0
3
Data Packet Received Interrupt Enable. When set, this bit enables a local interrupt
to be set when a data packet has been received from the host.
Yes
Yes
0
2
Data Packet Transmitted Interrupt Enable. When set, this bit enables a local
interrupt to be set when a data packet has been transmitted to the host.
Yes
Yes
0
1
Data OUT Token Interrupt Enable. When set, this bit enables a local interrupt to
be set when a Data OUT token has been received from the host.
Yes
Yes
0
0
Data IN Token Interrupt Enable. When set, this bit enables a local interrupt to be
set when a Data IN token has been received from the host.
Yes
Yes
0
8.6.8 (Address 0Ch: EP_AVAIL0) Endpoint Available Count (low byte)
Note: If DMA Request is enabled, then the value in this register corresponds to the endpoint buffer selected by DMA
Endpoint Select, rather than Page Select.
Bits
Description
Read
Write
Default
Value
7:0
EP_AVAIL[7:0]. For an OUT endpoint, this register returns the number of valid
bytes in the endpoint packet buffer. Values range from 0 (empty) to 1024 (full).
For an IN endpoint, this register returns the number of empty bytes in the packet
buffer. Values range from 0 (full) to 1024 (empty). This field is updated either after
2 bytes have been written to the buffer, or when the buffer has been validated.
If only the low byte of this field is read, the entire 11-bit field is frozen until the
upper byte is read.
Yes
No
0
8.6.9 (Address 0Dh: EP_AVAIL1) Endpoint Available Count (high byte)
Bits
Description
Read
Write
Default
Value
7:3
Reserved.
Yes
No
0
2:0
EP_AVAIL[10:8].
Yes
No
0
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