Iec 62680 1 1 2015

Acronyms ACA Ac es ory Charger Ada ter DCD Data Contact Detect DCP Dedicated Chargin Port... If the PD do s Primary Detection b fore the data pin have made contact, then the Primary Dete

IEC 62680- 1 - 1

Editio 1.0 2 15-0

Universal serial bus int er aces for dat a and pow er –

Part 1- 1: Common component s – USB Bat tery Charging Specificat ion,

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IEC 62680- 1 - 1

Edit io 1.0 2 15-0

Universal serial bus int er aces for dat a and pow er –

Part 1- 1: Common component s – USB Bat tery Charging Specificat ion,

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method of me s rement f or p rsonal computin eq ipment, of IEC tec nical commite 10 :

Au io, vide an multimedia s stems an eq ipment

The text of this stan ard is b sed on doc ments pre ared by the USB Implementers Forum

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organization whic s bmited it

The text of this stan ard is b sed on the fol owin doc ments:

Ful inf ormation on the votin f or the a proval of this stan ard can b foun in the re ort on

votin in icated in the a ove ta le

A lst of al the p rts in the IEC 6 6 0 series, publ s ed u der the general title Universal serial

b s intera es for d ata a d p wer can b fou d on the IEC we site

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related to the sp cif i publ cation At this date, the publ cation wi b

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• with rawn,

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A bi n ual version of this publcation may b is ued at a later date

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the USB Implementers Forum (USB-IF) These sp cification were s bmited to the IEC u der

the au pices of a special agre ment b twe n the IEC an the USB-IF

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ANY USB SPECIFICATIONS ARE PROVIDED TO YOU "AS IS, "WITH NO WARRANTIES

IMPL MENTERS FORUM AND THE AUTHORS OF ANY USB SPECIFICATIONS DISCLAIM

ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PROPRIETARY

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IEC DOES NOT TAKE ANY POSITION AS TO WHETHER IT IS ADVISABLE FOR YOU TO

ENTER INTO ANY USB ADOPTERS AGREEMENTS OR TO PARTICIPATE IN THE USB

IMPLEMENTERS FORUM.”

This series covers the Universal Series Bu interaces f or data an p wer an con ists of the

f ol owin p rts:

IEC 6 6 0-1-1, Universal Serial Bus intera es for d ata a d p wer – Part 1-1: Commo

c mp n nts – U SB Batt ery Ch rging Sp cific tion, Re ision 1.2

IEC 6 6 0-2-1, U niversal Serial Bus intera es for d ata a d p wer – Part 2-1: U niversal

Serial Bus Sp cific t ion, Re ision 2.0

IEC 6 6 0-2-2, Universal Serial Bus intera es for d ata a d p wer – P art 2-2: U SB

Micro-USB Ca les a d Co n ct ors Sp cific t io , Revision 1.01

IEC 6 6 0-2-3, U niv rsal Serial Bus intera es for d at a a d p wer – Part 2-3: Universal

Serial Bus Ca l es a d Co n ctors Cl as Do ume t Rev isio 2.0

This p rt of the IEC 6 6 0 series con ists of several distin t p rts:

• the main b d of the text, whic con ists of the original sp cification an al ECN an

Er ata develo ed by the USB-IF

FOREWORD 2

INTRODUCTION 4

1 Introd ction 13 1.1 Sco e 13 1.2 Bac grou d 13 1.3 Ref eren e Doc ments 13 1.4 Definition of Terms 14 1.4.1 Ac es ory Charger Ada tor 14 1.4.2 ACA-Doc 14 1.4.3 At ac vers s Con ect 14 1.4.4 Chargin Down tre m Port 1

4 1.4.5 Chargin Port 14 1.4.6 De d Bat ery Thres old 14 1.4.7 Dedicated Chargin Port 15 1.4.8 Down tre m Port 15 1.4.9 Micro ACA 15 1.4.10 Porta le Device 15 1.4.11 Rated Cur ent 15 1.4.12 Stan ard ACA 15 1.4.13 Stan ard Down tre m Port 15 1.4.14 USB Charger 15 1.4.15 We k Batery Thres old 15 1 5 Parameter Values 1

6 1.6 OTG Con ideration 16 1.7 Sup r Sp ed Con ideration 16 2 De d Batery Provision 16 2.1 Bac grou d 1

6 2.2 DBP – Un on g red Clau e 16 2.3 DBP – Config red Clau e 17 3 Chargin Port Detection 18 3.1 Overview 18 3.2 Charger Detection Hardware 19 3.2.1 Overview 19 3.2.2 VBUS Detect 2

3.2.3 Data Contact Detect 2

3.2.4 Primary Detection 2

3.2.5 Secon ary Detection 3

3.2.6 ACA Detection 3

3.3 Charger Detection Algorithms 3

3.3.1 We k Batery Algorithm 3

3.3.2 Go d Bat ery Algorithm 3

3.4 Charger Detection Timin 3

3.4.1 Data Contact Detect Timin 3

3.4.2 Detection Timin , CDP 3

3.5 Grou d Cur ent an Noise Margin 4

4.1 Chargin Port Req irements 4

4.1.1 Overs o t 4

4.1.2 Maximum Cur ent 4

4.1.3 Detection Renegotiation 4

4.1.4 Sh tdown Op ration 41

4.1.5 F i ure Voltage 41

4.1.6 Multiple Ports 41

4.2 Chargin Down tre m Port 41

4.2.1 Req ired Op ratin Ran e 41

4.2.2 Sh tdown Op ration 4

4.2.3 Un ers o t 4

4.2.4 Detection Sig al n 4

4.2.5 Con ector 4

4.3 ACA-Doc 4

4.3.1 Req ired Op ratin Ran e 4

4.3.2 Un ers o t 4

4.3.3 Detection Sig al n 4

4.3.4 Con ector 4

4.4 Dedicated Chargin Port 4

4.4.1 Req ired Op ratin Ran e 4

4.4.2 Un ers o t 4

4.4.3 Detection Sig al n 4

4.4.4 Con ector 4

4.5 Ac es ory Charger Ada ter 4

4.5.1 Req ired Op ratin Ran e 4

4.5.2 Un ers o t 4

4.5.3 Detection Sig al n 4

4.5.4 Con ector 4

4.6 Porta le Device 4

4.6.1 Al owed Op ratin Ran e 4

4.6.2 Detection Sig aln 4

4.6.3 Detection Renegotiation 4

4.6.4 Con ector 4

5 Parameter Values 4

6 Ac es ory Charger Ada ter 5

6.1 Introd ction 5

6.2 Micro ACA 5

6.2.1 Micro ACA Ports 5

6.2.2 Micro ACA Con ectivity Option 5

6.2.3 Micro ACA Arc itecture 5

6.2.4 Micro ACA Modes of Op ration 5

6.2.5 Implcation of not Sup ortin Micro ACA Detection 5

6.2.6 Micro ACA Req irements 5

6.2.7 Porta le Device State Diagram 5

6.3 Stan ard ACA 5

6.3.1 Stan ard ACA Ports 5

6.3.2 Stan ard ACA Arc itecture 6

6.3.3 Stan ard ACA Modes of Op ration 6

6.3.5 Stan ard ACA Req irements 6

Fig re 3-1 – Sy tem Overview 18 Fig re 3-2 – Charger Detection Hardware 19 Fig re 3-3 – Data Pin Off set 2

Fig re 3-4 – Data Contact Detect, Not At ac ed 21

Fig re 3-5 – Data Contact Detect, Stan ard Down tre m Port 2

Fig re 3-6 – Primary Detection, DCP 2

Fig re 3-7 – Primary Detection, CDP 2

Fig re 3-8 – Primary Detection, SDP 2

Fig re 3-9 – Primary Detection, ACA-Doc 2

Fig re 3-10 – Primary Detection, ACA 2

Fig re 3-1 – Secon ary Detection, DCP 3

Fig re 3-12 – Secon ary Detection, CDP 31

Fig re 3-13 – ACA Detection 3

Fig re 3-14 – We k Batery Algorithm 3

Fig re 3-15 – Go d Bat ery Algorithm 3

Fig re 3-16 – DCD Timin , Contact After Start 3

Fig re 3-17 – DCD Timin , Contact Before Start 3

Fig re 3-18 – DCD Timin , No Contact 3

Fig re 3-19 – Detection Timin , CDP 3

Fig re 4-1 – CDP Req ired Op ratin Ran e 4

Fig re 4-2 – DCP Req ired Op ratin Ran e 4

Fig re 4-3 – Porta le Device Al owed Op ratin Ran e 4

Fig re 6-1 – Ac es ory Charger Ada ter 51

Fig re 6-2 – Micro ACA Ports 5

Fig re 6-3 – Micro ACA Arc itecture 5

Fig re 6-4 – Porta le Device State Diagram 5

Fig re 6-5 – Stan ard ACA Ports 5

Fig re 6-6 – Stan ard ACA Arc itecture 61

Ta le 5-1 – Voltages 4

Ta le 5-2 – Cur ents 4

Ta le 5-3 – Resistan es 4

Ta le 5-4 – Ca acitan es 4

Ta le 5-5 – Times 5

Ta le 6-1 – Micro ACA Con ectivity Option 5

Ta le 6-2 – Micro ACA Modes of Op ration 5

Ta le 6-3 – Stan ard ACA Con ectivity Option 6

Ta le 6-4 – Stan ard ACA Modes of Op ration 6

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Contributors

Re ision History

BC1.1 Apri 15, 2 0 Tery Remple Major u d te to al s ctio s Ad e Data Co ta t

Dete t proto ol a d Ac e s ry Ch rg r Ad pter

BC1.2 Oct 5, 2 10 Tery Remple

Ad m Burn

Folowin items in ic te c a g s fom BC1.1 to BC1.2

Refere c s b low to Se tio , Fig re a d Ta le refer

to BC1.2, u le s BC1.1 is s e if i aly in ic te

1 Alow DC s to o tp t more th n 1.5A Alows

Porta le De ic s (P s) with switc mo e

c arg rs to draw more p wer Se tio 4.4.1

2 In re s minimum CD c re t to 1.5A With ut

5 Re uire C Ps to s p ort 1.5A d rin HS c irp

a d traf fic Aff ects C P c mmo mo e ra g

Se tio 3.5

6 Re u e ma imum P c re t fom 1.8A to 1.5A,

to a oid s utd wn wh n ata h d to CD Ta le

5-2

7 Re ame Do kin Statio to A A-Do k, to a oid

c nf usio with oth r ty e of Do kin Statio s

8 Re uire A A-Do k to dif fere tiate its lf f rom a

Revisio Date Auth r De criptio

2 Alow c arg rs to re e otiate c re t with P b

2 Only d vic s th t c n o erate sta d-alo e fom

intern l b tery p wer are alowe to u e th

De d Batery Pro isio Se tio 2.2

2 Alow c mp u d P s to draw ISUSP plu a

re p n ible f or prote tin th ms lv s a ain t

hig er v lta e o VBUS BC1.1 Se tio 6.7

4 Re uire A As to c ntin e pro idin p wer to

OTG d vic fom Ch rgin Port, e e if gro n

4 Remo e stateme ts re ardin d vic s with

multiple re e ta le Co ere in Multiple

Acronyms

ACA Ac es ory Charger Ada ter

DCD Data Contact Detect

DCP Dedicated Chargin Port

The Batery Chargin Workin Group is c artered with cre tin sp cif i ation that define

l mits as wel as detection, control an re ortin mec anisms to p rmit devices to draw

c r ent in ex es of the USB 2.0 sp cif i ation for c argin an /or p wering up f rom dedicated

c argers, hosts, h bs an c argin down tre m p rts These mec anisms are b c ward

comp tible with USB 2.0 compl ant hosts an p ripherals

1.2 Ba k round

The USB p rts on p rsonal computers are con enient places for Porta le Devices (PDs) to

draw c r ent f or c argin their b t eries This con enien e has led to the cre tion of USB

Chargers that simply exp se a USB stan ard-A rece tacle This al ows PDs to u e the same

USB ca le to c arge fom either a PC or f om a USB Charger

If a PD is atac ed to a USB host or h b, then the USB 2.0 sp cification req ires that after

con ectin , a PD mu t draw les than:

• 2.5 mA average if the bu is s sp n ed

• 10 mA if bu is not s sp n ed an not config red

• 5 0 mA if bu is not s sp n ed an con g red for 5 0 mA

If a PD is at ac ed to a Chargin Port, (i.e CDP, DCP, ACA-Doc or ACA), then it is alowed

to draw IDEV_C G without havin to b config red or fol ow the rules of s sp n

In order for a PD to determine how mu h c r ent it is alowed to draw f rom an upstre m USB

p rt, there ne d to b mec anisms that alow the PD to distin uis b twe n a Stan ard

Down tre m Port an a Chargin Port This sp cif i ation defines ju t s c mec anisms

Sin e PDs can b atac ed to USB c argers f rom variou man f acturers, it is imp rtant that

al provide an ac e ta le u er exp rien e This sp cification def i es the req irements for a

compl ant USB c arger, whic is ref er ed to in this sp c as a USB Charger

If a PD has a De d or We k Batery, then the Con ect Timin En ine rin Chan e Notice

(ECN) is ued by the USB-IF on the USB 2.0 sp c al ows that device to draw up to IU IT whi e

at ac ed but not con ected The con ition as ociated with this ECN are contained in Section

2 of this sp cif i ation, an are refer ed to as the De d Bat ery Provision (DBP)

The fol owin sp cification contain inf ormation relevant to the Bat ery Chargin Sp cification

• OTG an Emb d ed Host Sup lement, Revision 2.0

• USB 2.0 Sp cification

• USB 3.0 Sp cification

1.4 Definitions of Terms

This section contain def i ition for some of the terms u ed in this sp cif i ation

1.4.1 Ac e sory Charg r Ad ptor

An Ac es ory Charger Ada tor (ACA) is an ada tor whic al ows a sin le USB p rt to b

atac ed to b th a c arger an another device at the same time

The f ol owin terminolog is u ed when refer in to an ACA:

• ACA-A An ACA with ID resistan e of RID_A

• ACA-B An ACA with ID resistan e of RID_

• ACA-C An ACA with ID resistan e of RID_C

Se Section 6 f or detai s on an ACA

1.4.2 ACA-Doc

An ACA-Doc is a doc in station that has one upstre m p rt, an zero or more down tre m

p rts The upstre m p rt can b atac ed to a PD, an is ca a le of sourcin IC P to the PD

An ACA-Doc sig als it is an ACA-Doc to the PD by ena l n VDM_ RC d rin USB idle, an

by pul n ID to grou d throu h a resistan e of RID_A Se Section 3.2.4.4 for more detai s

1.4.3 At a h v rs s Conne t

This sp cification makes a distin tion b twe n the word “at ac ” an “con ect A

down tre m device is con idered to b atac ed to an upstre m p rt when there is a ph sical

ca le b twe n the two

A down tre m device is con idered to b con ected to an upstre m p rt when it is atac ed

to the upstre m p rt, an when the down tre m device has pul ed either the D+ or D- data

l ne hig throu h a 1.5 kΩ resistor, in order to enter L w-Sp ed, Ful-Sp ed or Hig -Sp ed

sig al n

1.4.4 Charging Downstre m Port

A Chargin Down tre m Port (CDP) is a down tre m p rt on a device that compl es with the

USB 2.0 def i ition of a host or a h b, ex e t that it s al s p ort the Chargin Down tre m

Port f eatures sp cified herein

A CDP s al output a voltage of VDM_ RC on its D- l ne when it sen es a voltage gre ter than

VD T RE but les than VLGC on its D+ l ne when not con ected to a p ripheral A CDP s al

not output a voltage of VDM_ RC on its D- l ne f rom the time that the p ripheral is con ected,

to the time that the p ripheral is dis on ected

1.4.5 Charging Port

A Chargin Port is a DCP, CDP, ACA-Doc or ACA

1.4.6 De d Bat ery Thre hold

The De d Batery Thres old is defined as the maximum c arge level of a b tery s c that

b low this thres old, a device is as ured of not b in a le to p wer up s c es f ul y

A De d Bat ery is defined as one that is b low the De d Bat ery Thres old

1.4.7 De ic te Charging Port

A Dedicated Chargin Port (DCP) is a down tre m p rt on a device that outputs p wer

throu h a USB connector, but is not ca a le of en meratin a down tre m device A DCP

s al source ID P at an average voltage of VCHG

A DCP s al s ort the D+ l ne to the D- l ne

1.4.8 Down tre m Port

In this sp cification, a Down tre m Port refers to either a Stan ard Down tre m Port or a

Chargin Down tre m Port

1.4.9 Micro ACA

A Micro ACA is an ACA with a Micro-AB rece tacle on the Ac es ory Port

1.4.10 Portable De ic

A PD as u ed in this sp cif i ation is a device whic is compl ant with this sp cification an the

USB 2.0 sp cification, an can draw c argin c r ent f om USB

1.4.1 Rate Cur e t

The Rated Cur ent of a Chargin Port is the amou t of c r ent that a Chargin Port can output

an sti maintain a VBUS voltage of VC G The Rated Cur ent of a DCP is req ired to b

within ID P, an the rated c r ent of a CDP or ACA-Doc is req ired to b within IC P

1.4.12 Sta dard ACA

A Stan ard ACA is an ACA with a Stan ard-A rece tacle on the Ac es ory Port

1.4.13 Sta dard Downstre m Port

In this sp cification, a Stan ard Down tre m Port (SDP) refers to a down tre m p rt on a

device that compl es with the USB 2.0 definition of a host or h b An SDP exp cts a

down tre m device with a go d b tery to draw les than 2.5 mA average when u con ected

or s sp n ed, up to 10 mA maximum when con ected an not config red an not

s sp n ed, an up to 5 0 mA maximum if so con g red an not s sp n ed A down tre m

device can b en merated when it is con ected to an SDP

An SDP pul s the D+ an D- l nes to grou d throu h two 15 kΩ ( ypical) resistors

An SDP may have the a i ty to sen e when a PD is drivin the D+ l ne to VD _ RC, an then

manage its p wer states ac ordin ly PDs are req ired to drive D+ to VD _ RC whenever they

The We k Batery Thres old is def i ed as the minimum c arge level of a b t ery s c that

a ove this thres old, a device is as ured of b ing a le to p wer up s c es ful y

A We k Batery is defined as one that is a ove the De d Bat ery Thres old an b low the

We k Bat ery Thres old A device with a We k Bat ery may or may not b a le to p wer up a

device s c es f ul y

A Go d Batery is defined as one that is a ove the We k Batery Thres old

1.5 Parameter Valu s

Parameter names are u ed throu hout this sp cif i ation in te d of p rameter values Al

p rameter values are f ou d in Section 5

1.6 OTG Consideration

A PD with a De d Batery can ot dif ferentiate b twe n a PC an an OTG A-device Th s, a

PD wi tre t b th the same

If an OTG A-device is con ected to a PD with a de d b t ery, then the OTG A-device is u der

no o l gation to provide any more c r ent than it normal y would to any device on its Targeted

Peripheral List (TPL)

An OTG A-device is al owed to sto drivin VBUS af ter a time of TA_WAIT BCON (Se OTG 2.0

Sup lement for value) whi e waitin f or the B-device to con ect Th s, a PD with a De d

Batery may not have time f or sig ificant c argin when at ac ed to an OTG A-device, if it

do s not con ect

1.7 Super Spe d Considerations

Sup rSp ed p rts defined in USB 3.0 are al owed to implement the c arger detection

mec anisms defined in this sp c When a PD detects it is atac ed to a Sup rSp ed p rt,

then ICFG_MA c an es to 9 0 mA, an IU IT c an es to 15 mA

The USB 2.0 sp cif i ation al ows a down tre m device to draw a s sp n c r ent of up to

ISUSP f rom a SDP when the device is not con ected or when the bu is s sp n ed If the bu

is not s sp n ed an the device is con g red, then USB 2.0 al ows a device to draw up to

ICFG_MA , de en in on the config ration the host ena les

This l mit of only ISUSP when not con ected can b problematic for PDs with a De d Bat ery

or a We k Batery Some PDs req ire more than IUNIT for several secon s ju t to p wer up

Th s, PDs with De d Bateries or We k Bateries may not b a le to p wer up when at ac ed

to an SDP if they can only draw ISUSP when not con ected

USB 2.0 al ows a PD that is a comp u d device to draw ISUSP for e c down tre m p rt whi e

at ac ed but not con ected or d rin s sp n

2.2 DBP – Unconf igure Cla s

A PD with a De d or We k Bat ery is al owed to draw I

U IT f rom a Down tre m Port u in the

DBP whi e not config red, providin it b haves as f ol ows:

• Red ces c r ent to ISUSP af ter time ut

– If PD is not re d to con ect an b en merated within TSVLD_CON_WKB af ter at ac ,

then it s al red ce its c r ent to ISUSP

• Ena les VDP_ RC when atac ed but not con ected

– PD s al ena le VDP_ RC within TDBP_AT _V PSRC of atac

– PD s al con ect within TDBP_V PSRC_CON of disa ln VD _ RC

en merate, as so n as p s ible

– PD s al not u e the DBP c r ent to p r orm u related tas s, s c as:

• Chargin b yon the We k Batery Thres old

• Makin a phone cal

• Playin a son , vide or game

• Esta l s in a wireles con ection

– Only devices that can o erate stan -alone f rom internal b t ery p wer are al owed to

u e the DBP

• Pas es inru h test

– PD with De d or We k Bat ery s al p s USB-IF compl an e inru h test

The un onfig red state in lu es the time that the PD is at ac ed an not con ected, an the

time that the PD is con ected an not config red A PD enters the config red state by

receivin a SET_CONFIGURATION comman f rom the host

2.3 DBP – Conf igure Cla s

A PD with a De d or We k Bat ery is al owed to draw its config red c r ent, (whic can b up

to ICFG_MA ), fom a Stan ard Down tre m Port u in the De d Batery Provision (DBP) whie

config red, an not have to p s USBCV tests, providin it b haves as f ol ows:

• Resp n s to received token

– PD s al resp n to any token ad res ed to it, with either a NAK or an other vald

USB resp n e

• Resp n s to USB reset

– Upon receipt of USB reset, a PD s al red ce its c r ent to IUNIT PD is al owed to

dis on ect up n receivin a reset Whi e dis on ected, PD is al owed to u e the

• Provides ful USB f un tional ty after time ut, or dis on ects

– After a time of TDBP_ UL_ N TN f rom at ac , a PD s al either remain con ected an b

a le to p s USBCV, or it s al dis on ect Whi e dis on ected, the PD is al owed to

u e the DBP – Un on g red Clau e

• Uses c r ent to re c We k Batery Thres old an provide ful USB fu ctional ty as so n

as p s ible

– PD s al not u e the DBP c r ent to p rf orm u related tas s, s c as:

• Chargin b yon the We k Batery Thres old

• Makin a phone cal

• Playin a son , vide or game

• Esta l s in a wireles con ection

• Provides ful USB fu ctionalty up n re c in We k Batery Thres old

– PD s al provide ful USB f un tional ty up n re c in We k Bat ery Thres old if this

oc urs b fore

TDBP_ UL_ N TN after atac

• PD inf orms u er within TDBP_INFOR of atac that it is c argin and not avaiable for other

In the first example, a Std-A to Micro-B ca le is u ed to atac a PD to an SDP, CDP or DCP

In the secon example, a DCP has a captive ca le This ca le do s not have wires for D+ or

D-, but in te d s orts the D+ an D- pin at the Micro-B plu

In the third example, an ACA is req ired to have a ca tive ca le that atac es to the Porta le

Device, an this ca le is req ired to have wires f or D+, D- an ID The ACA is also req ired to

have a p rt that can be at ac ed to a DCP or CDP The ca l n for this p rt is des rib d in

Section 6.2.1

IEC

In the fourth example, an ACA-Doc do s not have a ca le at al , but in te d has a ca tive

Micro-A plu An ACA-Doc receives p wer f rom a Pro rietary Charger, that is atac ed to the

ACA-Doc throu h a pro rietary ca le

3.2 Charger Dete tion Hardware

This section briefly des rib s the hardware u ed to do c arger detection The fol owin

section provide more detais of its o eration

Fig re 3-2 s ows the c arger detection hardware for a PD

Fig re 3-2 – Charger Dete tion Hardware

IEC

3.2.2 VBUS Dete t

Eac PD s al have a ses ion val d comp rator that detects when VBUS is gre ter than its

internal ses ion val d thres old Its internal ses ion val d thres old s al b within

VOTG_ E S VLD

3.2.3 Data Conta t Dete t

3.2.3.1 Ov rview

Data Contact Detect (DCD) u es a c r ent source, ID _ RC, to detect when the data pin have

made contact d rin an atac event A PD is not req ired to implement DCD If a PD do s

not implement DCD, then it s al wait a time of TD D_ IMEOUT min af ter the at ac event

b fore startin Primary Detection

DCD is a le to detect data pin contact whenever a PD is atac ed to an SDP or CDP The

primary b nefit of DCD is that it al ows a PD to start Primary Detection as so n as the data

pin have made contact, an then con ect, without havin to wait f or a timer to expire As p r

the USB Con ect Timin ECN, a p wered up USB device is req ired to con ect to a USB host

• Pro rietary c argers that pul D+ hig

Sin e DCD do s not work in al cases, a PD is req ired to proce d to Primary Detection within

TD D_ IMEOUT max after the at ac event if pin contact has not b en detected on the D+ or ID

pin Se Section 3.3.2

3.2.3.2 Problem De cription

USB plu s an rece tacles are desig ed s c that when the plu is in erted into the

rece tacle, the p wer pin make contact b fore the data pin make contact This is i u trated

in Fig re 3-3

Figure 3-3 – Data Pin Off set

As a res lt, when a PD is atac ed to an upstre m p rt, the PD wi detect VBUS bef ore the

data pin have made contact The time b tween p wer pin an data pin makin contact

IE C

de en s on how fast the plu is in erted into the rece tacle Delay of more than two h n red

mi isecon s have b en o served

The way that a PD distin uis es b twe n a Chargin Port an an SDP is to lo k at the data

l nes If the PD do s Primary Detection b fore the data pin have made contact, then the

Primary Detection protocol is s c that the PD wi determine that it is at ac ed to an SDP

If a PD is at ac ed to a DCP, an in or ectly determines that it is at ac ed to an SDP, then

the PD would draw ISUSP whie waitin to b en merated Sin e a DCP wi not en merate

the PD, the PD wi not b a le to c arge

3.2.3.3 Data Conta t Dete t, Not At a he

Fig re 3-4 s ows the case where the PD is not atac ed to a remote device

Fig re 3-4 – Data Conta t Dete t, Not At a h d

IE C

The protocol for Data Contact Detect is as fol ows:

• PD detects VBUS as erted

• PD turn on ID _ RC an the D- pul -down resistor

• PD waits f or D+ lne to b low f or a time of TD D_DBN

• PD turn of IDP_ RC an D- pul -down resistor

When nothin is at ac ed to the PD, the D+ lne stay hig The minimum value of ID _ RC is

s c that it is a le to hold D+ at VLGC_HI for worst case le kages in the PD d e to RD T LKG

an VD T LKG

3.2.3.4 Data Conta t Dete t, Sta dard Downstre m Port

Fig re 3-5 s ows the case where the PD is at ac ed to an SDP

Figure 3-5 – Data Conta t Dete t, Sta dard Downstre m Port

IEC

When the PD is at ac ed to an SDP, the D+ l ne is pul ed low by RD _DWN in the SDP The

maximum value of IDP_ RC is s c that RD _DWN pul s D+ to VLGC_LOW for worst values of

RD T LKG, VDAT LKG an RD _DWN

3.2.4 Primary Dete tion

Primary Detection is u ed to distin uis b twe n an SDP an dif ferent typ s of Chargin

Ports A PD is req ired to implement Primary Detection

3.2.4.1 Primary Dete tion, DCP

Fig re 3-6 s ows how Primary Detection work when a PD is at ac ed to a DCP

Figure 3-6 – Primary Dete tion, DCP

IEC

Durin Primary Detection the PD s al turn on VD _ RC an IDM_ IN Sin e a DCP is req ired

to s ort D+ to D- throu h a resistan e of RD P_D T, the PD wi detect a voltage on D- that is

close to VD _ RC

A PD s al comp re the voltage on D- with VD T RE If D- is gre ter than VDAT RE , then the

PD is al owed to detect that it is atac ed to either a DCP or CDP A PD is o tional y al owed

to comp re D- with VLGC as wel , an only determine that it is atac ed to a DCP or CDP if D-

is gre ter than VDAT RE , but les than VLGC The re son for this o tion is as f ol ows

On the other han , some pro rietary c argers also pul D+/- hig If a PD is at ac ed to one of

these c argers, an it determined it was not at ac ed to a c arger b cau e D- was gre ter

than VLGC, then the PD would determine that it was atac ed to an SDP, an only b a le to

draw ISUSP

The c oice of whether or not to comp re D- to VLGC de en s on whether the PD is more l kely

to b at ac ed to a PS2 p rt, or to a pro rietary c arger

3.2.4.2 Primary Dete tion, CDP

Fig re 3-7 s ows how Primary Detection work when a PD is at ac ed to a CDP

Fig re 3-7 – Primary Dete tion, CDP

A CDP is req ired to b have in either one of two way when a remote device is not con ected

to it The first way that a CDP is al owed to b have is to ena le VDM_ RC within TC _V M_ N

of a dis on ect, an then disa le VDM

_ RC

within TC

_V M_DI

S of a con ect When u in this

o tion, a CDP is not req ired to ena le IDP_ IN , or to comp re D+ to VD T RE

The second way a CDP is al owed to b have is to comp re D+ with VD T RE an VLGC

When D+ is gre ter than VD T RE an les than VLGC, the CDP s al ena le VDM_ RC When

D+ is les than VD T RE or gre ter than VLGC, the CDP s al disa le VDM_ RC Note that a

CDP is required to comp re D+ to VLGC, in order to disa le VDM_ RC when the PD con ects

Se Section 3.4.2 f or timin

Durin Primary Detection the PD s al turn on VD _ RC an IDM_ IN A PD s al comp re the

voltage on D- with VD T RE If D- is gre ter than VD T RE , then the PD is al owed to

determine that it is at ac ed to either a DCP or CDP A PD is o tional y al owed to comp re

D- with VLGC as wel, an only determine that it is atac ed to a DCP or CDP if D- is gre ter

than VD T RE , but les than VLGC Se Section 3.2.4.1 f or more detais

IEC

3.2.4.3 Primary Dete tion, SDP

Fig re 3-8 s ows how Primary Detection work when a PD is at ac ed to an SDP

Figure 3-8 – Primary Dete tion, SDP

Durin Primary Detection the PD s al turn on VDP_ RC an IDM_ IN When a voltage of

VD _ RC is a pl ed to D+, an SDP wi contin e pul n D- low throu h RDM_DWN

A PD s al comp re the voltage on D- with VD T RE If D- is les than VD T RE , then the PD

is al owed to determine that it is at ac ed to an SDP A PD is o tional y al owed to comp re

D- with VLGC as wel , an determine that it is at ac ed to an SDP if D- is gre ter than VLGC

Se Section 3.2.4.1 f or more detai s

3.2.4.4 Primary Dete tion, ACA-Doc

Fig re 3-9 s ows how Primary Detection work when a PD that s p orts ACA Detection is

at ac ed to an ACA-Doc

IEC

Figure 3-9 – Primary Dete tion, ACA-Doc

An ACA-Doc is a doc in station that has one upstre m p rt, an zero or more down tre m

The VBUS pin is at VC G b cau e the ACA-Doc is re dy to provide p wer to a PD The

ACA_Doc is req ired to pul D+ to VDP_UP throu h RD _U b cau e the VBUS pin is gre ter

than VOTG_ E S VLD

IEC

An ACA-Doc is req ired to ena le VDM_ RC whenever D+/- have b en inactive (at idle J state)

for a time of TC _V M_ N An ACA-Doc is req ired to disa le VDM_ RC within TC _V M_DIS of

an activity on D+/-

An ACA-Doc is req ired to present an imp dan e to grou d on ID of RID_A whenever it is

p wered It is req ired to present an imp dan e to grou d on ID of RID_ LOAT when it is not

at ac ed to an ACA that had a LS p ripheral on its Ac es ory Port, then the ID pin of the PD

would b pul ed to grou d throu h RID_A, an the D- pin would b at VLGC_HI in te d of

VDM_ RC In order to distin uis b twe n an ACA with a LS device an an ACA-Doc , the PD

is req ired to detect if D- is a ove or b low VLGC

The VDP_ RC in the PD s al b s c that D+ remain at a logic hig whi e the ACA-Doc is

pul n D+ to VD _U throu h RD _UP The re son for this is so that the ACA-Doc do s not

detect activity on D+, whic could cau e it to turn of its VDM_ RC b fore the PD completes its

Primary Detection

3.2.4.5 Primary Dete tion, Micro ACA

Fig re 3-10 s ows how Primary Detection work when a PD that s p orts ACA Detection is

at ac ed to a Micro ACA

Figure 3-10 – Primary Dete tion, ACA

A PD that s p orts ACA Detection is req ired to monitor the resistan e on the ID pin

whenever VBUS is gre ter than VOTG_ E S VLD If the ID resistan e is RID_ or RID_C, then

the PD k ows that it is atac ed to an ACA If the ID resistan e is RID_A, then the PD could b

at ac ed to either an ACA with a B-device on its Ac es ory Port, or to an ACA-Doc

In order to distin uis b twe n an ACA with an B-device, an an ACA-Doc , the PD s al

comp re the voltage on D- with VD T RE an VLGC to detect what it is at ac ed to as fol ows:

• D- < VD T RE

ACA with FS B-device on Ac es ory Port

The PD s al do the a ove detection on D- af ter atac , an b fore con ect, as s own in the

Go d Batery Algorithm

Af ter doin Primary Detection, a PD that s p orts ACA Detection s al contin e to monitor the

ID l ne If this resistan e c an es, the PD s al resp n ac ordin to the state mac ine

defined in Section 6.2.7

IEC

An ACA is req ired to do a f orm of Primary Detection over the DP_CHG an DN_CHG lnes to

detect if a Chargin Port is at ac ed to the ACA Charger Port This detection is done with the

l nes hig l g ted in yel ow, an is des rib d in Section 6.2.6

3.2.5 Se ondary Dete tion

Secon ary Detection can b u ed to distin uis b twe n a DCP an a CDP PDs that are not

re d to b en merated within TSVLD_CON_PWD of detectin VBUS are req ired to implement

Secon ary Detection PDs that are re d to b en merated are al owed to byp s Secon ary

Detection Se Section 3.3.2 on Go d Batery Algorithm

3.2.5.1 Se ondary Dete tion, DCP

Fig re 3-1 s ows how Secon ary Detection work when a PD is at ac ed to a DCP

Figure 3-1 – Se ondary Dete tion, DCP

IE C

Durin Secon ary Detection, a PD s al output VDM_ RC on D-, turn on ID _ INK, an comp re

the voltage on D+ to VDAT RE Sin e a DCP is req ired to s ort D+ to D- throu h a

resistan e of RDC _D T, the voltage on D+ wi b close to VDM_ RC, whic is a ove VD T RE

If a PD detects that D+ is gre ter than VD T RE , it k ows that it is at ac ed to a DCP It is

then req ired to ena le VD _ RC or pul D+ to VD _U throu h RDP_U , as def i ed in the Go d

Batery Algorithm in Section 3.3.2

A PD is not req ired to comp re D+ to VLGC d rin Secon ary Detection

3.2.5.2 Se ondary Dete tion, CDP

Fig re 3-12 s ows how Secon ary Detection work when a PD is at ac ed to a CDP

Figure 3-12 – Se ondary Dete tion, CDP

IEC

Durin Secon ary Detection, a PD s al output VDM_ RC on D-, turn on ID _ INK, an comp re

the voltage on D+ to VD T RE Sin e a CDP do s not s ort D+ to D-, the voltage on D+ wi

b close to grou d, whic is b low VDAT RE

ACA Detection al ows a PD to detect when it is atac ed to an ACA, an to detect what typ of

device is atac ed to the ACA Ac es ory Port Se Section 6 f or a des ription of the ACA

A PD is not req ired to s p ort ACA Detection Only PDs that have a Micro-AB rece tacle can

s p ort ACA Detection, sin e the ACA OTG Port has a ca tive ca le terminatin in a Micro-A