USB3320C-EZK Standard Microsystems (SMSC), USB3320C-EZK Datasheet - Page 48

• Manufacturer Part Number: USB3320C-EZK
• Description: USB PHY
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB3320C-EZK

• Lead Free Status / RoHS Status: Compliant

Revision 1.0 (07-14-09)
6.2.3
DATA[7:0]
NXT
CLK
STP
DIR
ULPI RXCMD
The ULPI Link needs information which was provided by the following pins in a UTMI implementation:
linestate[1:0], rxactive, rxvalid and rxerror. When implementing the OTG functions, the VBUS and ID
pin states must also be transferred to the Link.
ULPI defines a Receive Command Byte (RXCMD) that contains this information. The Encoding of the
RXCMD byte is given in the
Transfer of the RXCMD byte occurs in Synchronous Mode when the transceiver has control of the bus.
The ULPI Protocol Block shown in
A RXCMD can occur:
When a USB Receive is occurring, RXCMD’s are sent whenever NXT = 0 and DIR = 1. During a USB
Transmit, the RXCMD’s are returned to the Link after STP is asserted.
If an RXCMD event occurs during a USB transmit, the RXCMD is blocked until STP de-asserts at the
end of the transmit. The RXCMD contains the status that is current at the time the RXCMD is sent.
Idle
When a linestate change occurs.
When VBUS or ID comparators change state.
During a USB receive when NXT is low.
After the USB3320 deasserts DIR and STP is low during start-up
After the USB3320 exits Low Power Mode, Serial Modes, or Carkit Mode after detecting that the
Link has de-asserted STP, and DIR is low.
T0
Figure 6.6 ULPI Extended Register Read in Synchronous Mode
extended reg read
T1
TXD CMD
Table
T2
6.3.
DATASHEET
Figure 6.1
48
T3
determines when to send an RXCMD.
Extended
address
T4
Highly Integrated Full Featured Hi-Speed USB 2.0 ULPI Transceiver
Turn around
T5
Reg Data
T6
Turn around
SMSC USB3320
T7
Datasheet
Idle