USB3370 datasheet(60/75 Pages) MICROCHIP

60 / 75 page

USB3370

DS00001915B-page 60

 2012 - 2015 Microchip Technology Inc.

Note 7-4

rd: Read Only with auto clear.

7.1.3.4

USB IO & Power Management

Address = 39-3Bh (read), 39h (write), 3Ah (set), 3Bh (clear)

RidConversionStart

rd/w/s/c

When this bit is asserted either through a register write

or set, the Rid converter will read the value of the ID

resistor. When the conversion is complete this bit will

auto clear.

Reserved

rd/w/s/c

This bit must remain at 0.

RidIntEn

rd/w/s/c

When enabled an interrupt will be generated on the

alt_int of the RXCMD byte when RidConversionDone

bit is asserted.

Note:

This register bit is or’ed with the RidIntEn bit

of the Carkit Interrupt Status register.

Reserved

Read only, 0.

Field Name

Bit

Access

Default

Description

Reserved

rd/w/s/c

Read only, 0.

SwapDP/DM

rd/w/s/c

When asserted, the DP and DM pins of the USB

transceiver are swapped. This bit can be used to

prevent crossing the DP/DM traces on the board. In

UART mode, it swaps the routing to the DP and DM

pins.

UART RegOutput

3:2

rd/w/s/c

01b

Controls the output voltage of the VBAT to VDD33

regulator in UART mode. When the PHY is switched

from USB mode to UART mode regulator output will

automatically change to the value specified in this

00: 3.3V

01: 3.0V (default)

10: 2.75V

11: 2.5V

ChargerPullupEnDP

rd/w/s/c

Enables the RCD Pull-up resistor on the DP pin. (The

pull-up is automatically enabled in UART mode)

ChargerPullupEnDM

rd/w/s/c

Enables the RCD Pull-up resistor on the DM pin. (The

pull-up is automatically enabled in UART mode)

USB RegOutput

7:6

rd/w/s/c

00b

Controls the output voltage of the VBAT to VDD33

regulator in USB mode. When the PHY is in

Synchronous Mode, Serial Mode, or Low Power Mode,

the regulator output will be the value specified in this

00: 3.3V (default)

01: 3.0V

10: 2.75V

11: 2.5V

Field Name

Bit

Access

Default

Description

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