USB333X datasheet(68/85 Pages) MICROCHIP

68 / 85 page

USB333x

DS00001880A-page 68

 2009 - 2015 Microchip Technology Inc.

7.1.3.4

Vendor Rid Conversion

Address = 36-38h (read), 36h (write), 37h (set), 38h (clear)

Note 7-5

rd: Read Only with auto clear

Field Name

Bit

Access

Default

Description

RidValue

2:0

rd/w

000b

Conversion value of Rid resistor

000: 0 ohms

001: 75 ohms

010: 100K ohms

011: 200K ohms

100: Reserved

101: ID floating

111: Error

Note:

RidValue

can also be read from the Carkit

Interrupt Status Register.

RidConversionDone

3rd (Note 7-

Automatically asserted by the USB333x when the Rid

Conversion is finished. The conversion will take

282uS. This bit will auto clear when the RidValue is

read from the Rid Conversion Register. Reading the

RidValue

from the Carkit Interrupt Status Register will

not clear either RidConversionDone status bit.

Note:

RidConversionDone

can also be read from

the Carkit Interrupt Status Register.

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.

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