USB3300_07 datasheet(31/55 Pages) SMSC

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Hi-Speed USB Host, Device or OTG PHY with ULPI Low Pin Interface

Datasheet

SMSC USB3300

Revision 1.08 (11-07-07)

DATASHEET

during a USB receive when NXT is low.

after STP is asserted during a USB transmit cmd.

Notes:

1. An ‘X’ is a do not care and can be either a logic 0 or 1.

2. The value of VbusValid is defined in Table 6.10, "External Vbus Indicator Logic".

6.1.7

USB3300 Transmitter

The USB3300 ULPI transmitter fully supports HS, FS, and LS transmit operations. Figure 6.2, "ULPI

Digital Block Diagram" shows the high speed, full speed, and low speed transmitter block controlled

by ULPI Protocol Block. Encoding of the USB packet follows the bit-stuffing and NRZI outlined in the

USB 2.0 specification. Many of these functions are re-used between the high speed and full/low speed

transmitters. When using the USB3300, Table 6.8, "DP/DM termination vs. Signaling Mode" should

always be used as a guideline on how to configure for various modes of operation. The transmitter

decodes the inputs of Xcvrselect, Termselect, opmodes, DpPulldown and DmPulldown to determine

what operation is expected. Users must strictly adhere to the modes of operation given in Table 6.8.

Several important functions for a device and host are designed in the transmitter blocks.

Table 6.5 ULPI RX CMD Encoding

DATA[7:0]

NAME

DESCRIPTION AND VALUE

[1:0]

Linestate

UTMI Linestate Signals

DATA[1] = Linestate[1]

DATA[0] = Linestate[0]

[3:2]

Encoded

Vbus

State

ENCODED VBUS VOLTAGE STATES

VALUE

VBUS VOLTAGE

SESSEND

SESSVLD

VBUSVLD2

VVBUS < VSESS_END

VSESS_END < VVBUS <

VSESS_VLD

VSESS_VLD < VVBUS <

VVBUS_VLD

VVBUS_VLD < VVBUS

[5:4]

Rx Event

Encoding

ENCODED UTMI EVENT SIGNALS

VALUE

RXACTIVE

RXERROR

HOSTDISCONNECT

[6]

State of

ID pin

Set to the logic state of the ID pin. A logic low indicates an A device. A logic high

indicates a B device.

[7]

Reserved

Always

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