USB332X Standard Microsystems Corporation, USB332X Datasheet - Page 7

• Manufacturer Part Number: USB332X
• Description: Miniature Hi-speed USB Transceiver with 1.8V ULPI Interface
• Manufacturer: Standard Microsystems Corporation

Miniature Hi-Speed USB Transceiver with 1.8V ULPI Interface
SMSC USB332x
BALL
A3
B3
B2
A2
A1
C3
RESETB
REFCLK
VDD18
RBIAS
NAME
GND
STP
Table 1 USB332x Pin Description (continued)
PRODUCT PREVIEW
DIRECTION/
Analog,
CMOS,
Ground
CMOS
CMOS
CMOS
Power
TYPE
Input,
Input,
Input,
7
ACTIVE
LEVEL
High
Low
N/A
N/A
N/A
N/A
The Link asserts STP for one clock cycle
to stop the data stream currently on the
bus. If the Link is sending data to the
PHY, STP indicates the last byte of data
was on the bus in the previous cycle.
External 1.8V Supply input pin. This pad
needs to be bypassed with a 0.1uF
capacitor to ground, placed as close as
possible to the USB332x.
When low, the part is suspended with all
ULPI outputs tri-stated. When high, the
USB332x will operate as a normal ULPI
device. The state of this pin may be
changed asynchronously to the clock
signals. When asserted for a minimum of
1 microsecond and then de-asserted, the
ULPI registers are reset to their default
state and all internal state machines are
reset.
ULPI Clock Out Mode:
Model-specific reference clock.
See
ULPI Clock In Mode:
60MHz ULPI clock input.
Bias Resistor pin. This pin requires an
8.06kΩ (±1%) resistor to ground, placed
as close as possible to the USB332x.
Nominal voltage during ULPI operation is
0.8V.
Ground.
ORDER NUMBER(S):
DESCRIPTION
Revision 0.3 (02-04-08)
on page 2.