Specification
NET2270 USB Interface Controller
______________________________________________________________________________
NetChip Technology, Inc., 2003
335 Pioneer Way, Mountain View, California 94041
TEL (650) 526-1490
FAX (650) 526-1494
http://www.netchip.com
Rev 3.6, April 17, 2003
57
8.5.8 (Address 33h; XCVRDIAG) Transceiver Diagnostic Register
Bits
Description
Read
Write
Default
Value
7
Full Speed Receive SE0. High when a single-ended zero is detected in full- speed
mode.
Yes
No
-
6
Full Speed Receive Data. High when received data is a J (idle), and low when
received data is a K (resume) in full- speed mode.
Yes
No
-
5:4
IOST[1:0]
Value
Description
00
High-speed normal operation
01
High-speed K
10
High-speed J
11
High-speed high impedance
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
Reserved.
Yes
No
0
0
RPU Disable. When low, the Full-speed pull-up resistor on DP is enabled (RPU pin
set high).
When high, the Full-speed pull-up resistor on DP is disabled (RPU pin
tri-stated).
Yes
No
1
8.5.9 (Address 40h; SETUP0) Setup Byte 0
Bits
Description
Read
Write
Default
Value
7:0
Setup Byte 0. This register provides byte 0 of the last setup packet received. For a
Standard Device Request, the following bmRequestType information is returned.
Refer to section 9.3 of the USB 2.0 specification.
Bit
Description
7
Direction: 0 = host to device; 1 = device to host
6:5
Type: 0 = Standard, 1 = Class, 2 = Vendor, 3 = Reserved
4:0
Recipient: 0 = Device, 1 = Interface, 2 = Endpoint, 3 = Other,
4-31 = Reserved
Yes
No
0
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