USB3450-FZG SMSC [SMSC Corporation], USB3450-FZG Datasheet - Page 13

• Manufacturer Part Number: USB3450-FZG
• Description: HI-SPEED USB HOST OR DEVICE PHY WITH UTMI+INTERFACE
• Manufacturer: SMSC [SMSC Corporation]

Hi-Speed USB Host or Device PHY With UTMI+ Interface
Datasheet
SMSC USB3450
PIN
22
23
24
25
26
27
28
29
30
31
32
33
34
35
RXERROR
RXVALID
DATA[7]
DATA[6]
DATA[5]
DATA[4]
DATA[3]
DATA[2]
DATA[1]
DATA[0]
VDD3.3
VDD1.8
NAME
HOST
XO
Table 3.1 USB3450 Pin Definitions (continued)
DIRECTION,
Pull-low
Pull-low
Pull-low
Pull-low
Pull-low
Pull-low
Pull-low
Pull-low
CMOS,
CMOS,
CMOS,
CMOS,
CMOS,
CMOS,
CMOS,
CMOS,
Output,
Analog
Output
Output
TYPE
Input
N/A
I/O,
I/O,
I/O,
I/O,
I/O,
I/O,
I/O,
I/O,
N/A
DATASHEET
ACTIVE
LEVEL
High
High
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
13
DESCRIPTION
8-bit bi-directional data bus. Data[7] is the MSB and
Data[0] is the LSB.
Receive Data Valid. Indicates that the DATA bus has
received valid data. The Receive Data Holding
Register is full and ready to be unloaded. The Link
is expected to register the DATA bus on the rising
edge of CLKOUT.
Host Pull-down Select. This signal enables the 15k
Ohm pull-down resistor on the DM line.
0: Pull-down resistor not connected to DM
1: Pull-down resistor connected to DM
Receive Error. This output is clocked with the same
timing as the receive DATA lines and can occur at
anytime during a transfer.
0: Indicates no error.
1: Indicates a receive error has been detected.
3.3V PHY Supply. Provides power for Hi-Speed
Transceiver, UTMI+ Digital, Digital I/O, and
Regulators.
1.8V regulator output for digital circuitry on chip.
Place a 4.7uF low ESR capacitor near this pin and
connect the capacitor from this pin to ground.
Connect pin 34 to pin 19. See
"Internal
Crystal pin. If using an external clock on XI this pin
should be floated.
Regulators".
Section 6.6.1,
Revision 0.1 (05-11-05)