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
64
8.5.7 (Address 32h; USBTEST) USB Test Modes
Bits
Description
Read
Write
Default
Value
7:3
Reserved.
Yes
No
0
2:0
Test Mode Select. See sections 7.1.20 and 9.4.9 of the USB 2.0 specification.
Value
Test
000
Normal Operation
001
Test_J
010
Test_K
011
Test_SE0_NAK
100
Test_Packet
101
Test_Force_Enable
110
Reserved
111
Reserved
Yes
Yes
0
8.5.8 (Address 33h; XCVRDIAG) Transceiver Diagnostic Register
Bits
Description
Read
Write
Default
Value
7:6
Linestate.
This field indicates the state of the DM (Linestate[1]) and DP
(Linestate[0]) USB data signals.
[DM,DP]
Description
00
SE0 (Single-ended zero)
01
“J” state (idle)
10
“K” state (resume)
11
SE1 (Single-ended one)
Yes
No
-
5:4
Opmode. This field indicates the operational state of the transceiver.
Value
Description
00
normal operation
01
non-driving
10
disable bit stuffing and NRZI endcoding
11
reserved
Yes
No
--
3
Force High Speed. When this bit is high, the transceiver is forced into high-speed
mode (480 Mbps).
Yes
Yes
0
2
Force Full Speed. When this bit is high, the transceiver is forced into full-speed
mode (12 Mbps).
Yes
Yes
0
1:0
Reserved.
Yes
No
-
8.5.9 (Address 34h; VIRTOUT0) Virtual OUT 0
Bits
Description
Read
Write
Default
Value
7:1
Virtual OUT Interrupts. These bits are set when the Virtual Endpoint Enable bit is
set, and an OUT token is received by a virtual endpoint that is not mapped to a
physical endpoint.
Bit 1 corresponds to OUT Endpoint Number 1, and bit 7
corresponds to OUT Endpoint Number 7. Writing a 1 to a bit clears that bit.
Yes
Yes/Clr
0
0
Reserved.
Yes
No
0
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