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
16
2.2
USB Transceiver (15 pins)
Signal Name
Pin
Type
Description
DP
56
I/O
High Speed USB Data Port.
DP is the high speed positive differential data signal of the USB data port.
This pin connects directly to the USB connector.
DM
58
I/O
High Speed USB Data Port.
DM is the high speed negative differential data signal of the USB data
port. This pin connects directly to the USB connector.
RSDP
55
I/O
Full Speed USB Data Port.
RSDP is the full speed positive differential data signal of the USB data
port. This pin connects through a 35.7 ohm +/- 1% resistor to the USB
connector.
RSDM
59
I/O
Full Speed USB Data Port.
RSDM is the full speed negative differential data signal of the USB data
port. This pin connects through a 35.7 ohm +/- 1% resistor to the USB
connector.
RPU
53
O
DP Pull Up Resistor. Connect to DP pin through a 1.5K resistor.
RREF
49
I
Reference Resistor. Connect 9.09K +/- 1% resistor to analog ground.
The typical voltage on this pin is 1.27 volts.
AVDD
51
Power
Analog Supply Voltage. Connect to analog 3.3 V.
AVSS
50, 52
Ground
Analog Ground. Connect to analog ground.
PVDD
62
Power
PLL Supply Voltage. Connect to analog 3.3 V.
PVSS
61
Ground
PLL Ground. Connect to analog ground.
VDD
57
Power
Digital Supply Voltage. Connect to 3.3 V.
VSS
54, 60, 63
Ground
Digital Ground. Connect to ground.
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