USB3300 datasheet(21/53 Pages) MICROCHIP

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DS00001783B-page 21

USB3300

6.1.4.5

Function Control: Address = 04-06h (read), 04h (write), 05h (set), 06h (clear)

6.1.4.6

Interface Control: Address = 07-09h (read), 07h (write), 08h (set), 09h (clear)

Field Name

Bit

Default

Description

XcvrSelect[1:0]

1:0

01b

Selects the required transceiver speed.

00b: Enables HS transceiver

01b: Enables FS transceiver

10b: Enables LS transceiver

11b: Enables FS transceiver for LS packets (FS preamble

automatically pre-pended)

TermSelect

Controls the DP and DM termination depending on XcvrSelect,

OpMode, DpPulldown, and DmPulldown. The Dp and DM

termination is detailed in Table 6-8, "DP/DM Termination vs.

Signaling Mode".

OpMode

4:3

00b

Selects the required bit encoding style during transmit.

00b: Normal Operation

01b: Non-Driving

10b: Disable bit-stuff and NRZI encoding

11b: Reserved

Reset

Active high transceiver reset. This reset does not reset the ULPI

interface or register set. Automatically clears after reset is

complete.

SuspendM

Active low PHY suspend. When cleared the PHY will enter Low

Power Mode as detailed in Section 6.1.9, "Low Power Mode".

Automatically set when exiting Low Power Mode.

Reserved

Driven low.

Field Name

Bit

Default

Description

6-pin FsLsSerialMode

Changes the ULPI interface to a 6-pin Serial Mode. The PHY will

automatically clear this bit when exiting serial mode.

3-pin FsLsSerialMode

Changes the ULPI interface to a 3-pin Serial Mode. The PHY will

automatically clear this bit when exiting serial mode.

Reserved

Driven low.

ClockSuspendM

Enables Link to turn on 60MHz CLKOUT in serial mode.

0b: Disable clock in serial mode.

1b: Enable clock in serial mode.

AutoResume

Only applicable in Host mode. Enables the PHY to automatically

transmit resume signaling. This function is detailed in Section

6.1.7.4, "Host Resume K".

IndicatorComplement

Inverts the EXTVBUS signal. This function is detailed in Section

6.5.4, "External Vbus Indicator".

IndicatorPassThru

Disables anding the internal VBUS comparator with the EXTVBUS

input when asserted. This function is detailed in Section 6.5.4.

InterfaceProtectDisable

Used to disable the integrated STP pull-up resistor used for

interface protection. This function is detailed in Section 6.1.9.3,

"Interface Protection".

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