USB333X datasheet(61/85 Pages) MICROCHIP

61 / 85 page

 2009 - 2015 Microchip Technology Inc.

DS00001880A-page 61

USB333x

7.1.1.7

OTG Control

Address = 0A-0Ch (read), 0Ah (write), 0Bh (set), 0Ch (clear)

7.1.1.8

USB Interrupt Enable Rising

Address = 0D-0Fh (read), 0Dh (write), 0Eh (set), 0Fh (clear)

Field Name

Bit

Access

Default

Description

IdPullup

rd/w/s/c

Connects a 100kΩ pull-up resistor from the ID pin to

VDD33

0b: Disables the pull-up resistor

1b: Enables the pull-up resistor

DpPulldown

rd/w/s/c

Enables the 15k Ohm pull-down resistor on DP.

0b: Pull-down resistor not connected

1b: Pull-down resistor connected

DmPulldown

rd/w/s/c

Enables the 15k Ohm pull-down resistor on DM.

0b: Pull-down resistor not connected

1b: Pull-down resistor connected

DischrgVbus

rd/w/s/c

This bit is only used during SRP. Connects a resistor

from VBUS to ground to discharge VBUS.

0b: disconnect resistor from VBUS to ground

1b: connect resistor from VBUS to ground

ChrgVbus

rd/w/s/c

This bit is only used during SRP. Connects a resistor

from VBUS to VDD33 to charge VBUS above the

SessValid threshold.

0b: disconnect resistor from VBUS to VDD33

1b: connect resistor from VBUS to VDD33

DrvVbus

rd/w/s/c

Not Implemented.

DrvVbusExternal

rd/w/s/c

Not Implemented.

UseExternalVbus

Indicator

rd/w/s/c

Tells the PHY to use an external VBUS over-current or

voltage indicator. This function is detailed in

Section 5.6.2.

0b: Use the internal VbusValid comparator

1b: Use the EXTVBUS input as for VbusValid signal.

Note:

The EXTVBUS signal is always high on the

USB333x.

Field Name

Bit

Access

Default

Description

HostDisconnect Rise

rd/w/s/c

Generate an interrupt event notification when

Hostdisconnect changes from low to high. Applicable

only in host mode.

VbusValid Rise

rd/w/s/c

Generate an interrupt event notification when

Vbusvalid changes from low to high.

SessValid Rise

rd/w/s/c

Generate an interrupt event notification when

SessValid changes from low to high.

SessEnd Rise

rd/w/s/c

Generate an interrupt event notification when SessEnd

changes from low to high.

IdGnd Rise

rd/w/s/c

Generate an interrupt event notification when IdGnd

changes from low to high.

Reserved

7:5

Read only, 0.

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