LP8727

SNVS898A – OCTOBER 2012 – REVISED MAY 2013

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Table 1. Device Indentification Index (continued)

ID RESISTOR

ADC VALUE

ADC VOLTAGE

D+ CONDITION

D

−CONDITION

VBUS [V]

FUNCTION

[k

Ω]

1001

75.60%

620

Reserved

1000

68.20%

430

Reserved

0111

62.20%

330

Reserved

0110

54.50%

240

Reserved

TA for North

0101

47.40%

180

5

America

0100

39.40%

130

TX

RX

5

UART (Factory)

0011

33.30%

100

Reserved

0010

21.90%

56

D+

D-

5

USB (Factory)

0001

12.50%

28.7

VZW

0000

0%

MIC

Speaker

Speaker

Microphone

0000

0%

GND

D+

D-

USB OTG

DETECTION VALUES with 2.2 k

Ω PULL-UP RESISTOR

1011 to 1000

100% to 68.2%

Reserved

0111 to 0100

62.2% to 39.4%

Typical Microphone

001 to 0001

33.3% to 12.5%

Reserved

0000

0%

GND

D+

D-

USB OTG

DETECTION VALUES with 620

Ω PULL-UP RESISTOR

1011 to 0001

100% to 12.5%

Reserved

0000

0%

GND

D+

D

−

USB OTG

USB DETECTION

The LP8727 can detect dedicated charger, standard downstream port and charging downstream port based on

USB Battery Charging Specification Revision 1.1. In order to avoid false detection before data (D+ and D

−)

connection, the LP8727 supports ‘Data Contact Detect’ feature.

18

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