USB3370 datasheet(59/75 Pages) MICROCHIP

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 2012 - 2015 Microchip Technology Inc.

DS00001915B-page 59

USB3370

7.1.3.2

USB-IF Charger Detection

Address = 32h (read / write)

7.1.3.3

Vendor Rid Conversion

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

Field Name

Bit

Access

Default

Description

VDatSrcEn

0rd/w

VDAT_SRC voltage enable

0b: Disabled

1b: Enabled

IDatSinkEn

1rd/w

IDAT_SINK current sink and VDAT_DET comparator

enable

0b: Disabled, VDAT_DET = 0.

1b: Enabled

ContactDetectEn

2rd/w

IDP_SRC Enable

0b: Disabled

1b: Enabled

HostChrgEn

rd/w

Enable Charging Host Port Mode.

0b: Portable Device

1b: Charging Host Port. When the charging host port

bit is set the connections of VDAT_SRC, IDAT_SINK,

IDP_SRC, and VDAT_DET are reversed between DP and

VdatDet

4rd

VDAT_DET Comparator output. IdatSinkEn must be set

to 1 to enable the comparator.

0b: No voltage is detected on DP or Linestate[1:0] is

not equal to 00b.

1b: Voltage detected on DP, and Linestate[1:0] = 00b.

Note:

VdatDet

can also be read from the Carkit

Interrupt Status register described in

Section 7.1.2.3.

Reserved

5-7

Read only, 0.

Note:

The charger detection should be turned off before beginning USB operation. USB-IF Charger Detection

Bits 2:0 should be set to 000b.

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: 440K ohms

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 USB3370 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.

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