USB3320 datasheet(55/70 Pages) MICROCHIP

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 2014-2015 Microchip Technology Inc.

DS00001792B-page 55

USB3320

7.1.2.3

Carkit Interrupt Status

Address = 20h (read only)

7.1.2.4

Carkit Interrupt Latch

Address = 21h (read only with auto-clear)

Note 7-3

rd: Read Only with auto clear.

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 Vendor Rid Conversion register

described in Section 7.1.3.3.

Reserved

7:6

00b

Read only, 0.

Field Name

Bit

Access

Default

Description

IdFloat

Asserted when the ID pin is floating. IdPullup must be

enabled.

CarIntDet

Not Implemented. Reads as 0b.

CarDp

Not Implemented. Reads as 0b.

RidValue

5:3

000b

Conversion value of Rid resistor

000: 0 ohms

001: 75 ohms

010: 102K ohms

011: 200K ohms

100: 440K ohms

101: ID floating

111: Error

Note:

RidValue

can also be read from the Vendor

Rid Conversion register described in

Section 7.1.3.3.

RidConversionDone

Automatically asserted by the USB3320 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 Vendor Rid Conversion register described

in Section 7.1.3.3.

Reserved

Read only, 0.

Field Name

Bit

Access

Default

Description

IdFloat Latch

0rd (Note 7-

Asserted if the state of the ID pin changes from non-

floating to floating while the IdFloatRise bit is enabled

or if the state of the ID pin changes from floating to

non-floating while the IdFloatFall bit is enabled.

CarIntDet Latch

Not Implemented. Reads as 0b.

CarDp Latch

Not Implemented. Reads as 0b.

RidConversionLatch

3rd

(Note 7-3)

If RidIntEn is set and the state of the

RidConversionDone

bit changes from a 0 to 1 this bit

will be asserted.

Reserved

7:4

0000b

Read only, 0.

Field Name

Bit

Access

Default

Description

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