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Нижегородский Государственный Технический Университет им. Р.Е. Алексеева

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[НЕСОРТИРОВАННОЕ]

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usb_2.0_english

.pdf

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Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

FS/LS device

(data toggle) 0

uFrame M+1
uFrame M+2	ct1
	ct2
	ch6
uFrame M+3	ct1
	ct1
	ct2
	ch6
uFrame M+4	ct1
	ct1
	ct2
	ce7
	ce3
uFrame M+8
	st1
	st2
	sd1
uFrame M+9

uFrame M+10	ct1
	ct2
	ch2
1

TRANS_ERR

se1

CSPLIT ct1

OUT

ct2

NYET ch5

CSPLIT ct1

OUT ct2

NYET ch5

CSPLIT ct1

OUT ct2

NYET ch5

SSPLIT(retry)

st1

OUT st2

DATA0 sh1

SS:Pending/x

OUT

DATA0

ACK

CS:Ready/ack

CSPLIT

ct1

OUT

ct2

CS:Old/ack

ACK ch2

Figure A-48. Normal HS DATA0/1 Smash

493

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

SS:Pending/x

FS/LS device

(data toggle) 0

uFrame M+1

OUT

DATA0

ACK

				CS:Ready/ack
uFrame M+2	ct1	CSPLIT
	ct2	OUT
				Hub ignores this
				OUT because no
	TRANS_ERR			match the address
	TRANS_ERR
	ce1->ce6
	ct1	CSPLIT(retry imm.)
	ct1		ct1
			ct1
	ct2	OUT	ct2
			ct2
		ACK	ch2	CS:Old/ack
	ch2	ACK	ch2
	ch2
1
uFrame M+3	Host does not issue 2nd CSPLIT,			CS:Free/x
	because host already receives ACK
	on previous microframe.
uFrame M+4	Host does not issue 3rd CSPLIT,			SS:Free/x
	because host already receives ACK
	on previous microframe.

Figure A-49. Normal HS CSPLIT Smash

494

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

SS:Pending/x

FS/LS device

(data toggle) 0

uFrame M+1

uFrame M+2	ct1	CSPLIT
	ct2	OUT

OUT

DATA0

ACK

CS:Ready/ack

Hub ignores this OUT.( no match the Address field)

TRANS_ERR

ce1->ce6

ct1	CSPLIT(retry imm.)

ct2 OUT

Hub ignores this

OUT.( no match

the Address field)

TRANS_ERR

ce1->ce6

ct1	CSPLIT(retry imm.)

ct2 OUT

TRANS_ERR

ce1->ce5

ENDPOINT HALT

uFrame M+3 Host does not issue 2nd CSPLIT,

because this endpoint is already ENDPOINT HALT.

uFrame M+4 Host does not issue 3rd CSPLIT,

because this endpoint is already ENDPOINT HALT.

Hub ignores this OUT.( no match the Address field)

CS:Free/x

SS:Free/x

Figure A-50. Normal HS CSPLIT 3 Strikes Smash

495

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

SS:Pending/x

FS/LS device

(data toggle) 0

uFrame M+1

OUT

DATA0

ACK

				CS:Ready/ack
uFrame M+2	ct1	CSPLIT
	ct1		ct1
			ct1
	ct2	OUT	ct2
			ct2
		ACK	ch2	CS:Old/ack
		ACK	ch2
	TRANS_ERR
	ce1->ce6
	ct1	CSPLIT(retry imm.)
	ct1		ct1
			ct1
	ct2	OUT	ct2
			ct2
	ch2	ACK	ch2
	ch2
1
uFrame M+3	Host does not issue 2nd CSPLIT,			CS:Free/x
	because host already receives ACK
	on previous microframe.
uFrame M+4	Host does not issue 3rd CSPLIT,			SS:Free/x
	because host already receives ACK
	on previous microframe.

Figure A-51. Normal HS ACK(C) Smash

496

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

SS:Pending/x

FS/LS device

(data toggle) 0

uFrame M+1

OUT

DATA0

ACK

CS:Ready/ack

uFrame M+2	CSPLIT(retry imm.)
ct1		ct1
		ct1
ct2	OUT	ct2
		ct2
	ACK	ch2	CS:Old/ack
	ACK	ch2
TRANS_ERR
ce1->ce6
ct1	CSPLIT(retry imm.)
ct1		ct1
		ct1
ct2	OUT	ct2
		ct2
	ACK	ch2
TRANS_ERR
ce1->ce6
ct1	CSPLIT(retry imm.)
ct1		ct1
		ct1
ct2	OUT	ct2
		ct2
	ACK	ch2
TRANS_ERR
ce1->ce5
ENDPOINT HALT
uFrame M+3 Host does not issue 2nd CSPLIT,			CS:Free/x
because this endpoint is already
ENDPOINT HALT.
uFrame M+4 Host does not issue 3rd CSPLIT,			SS:Free/x
because this endpoint is already
ENDPOINT HALT.

Figure A-52. Normal HS ACK(C) 3 Strikes Smash

497

Universal Serial Bus Specification Revision 2.0

Host			Hub
Host			(SS: start sp. status
(data toggle)			(SS: start sp. status
(data toggle)			CS: comp. sp. status)
			CS: comp. sp. status)
0			SS:Free/x
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1
			SS:Pending/x
uFrame M+1			OUT

DATA0

TRANS_ERR

CS:Ready/trans_err

uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2

CS:Old/trans_err

ERR ch4

TRANS_ERR on FS/LS

	ce2->ce3
uFrame M+3	Host does not issue 2nd CSPLIT,			CS:Free/x
	because host already receives ERR
	on previous microframe.
uFrame M+4	Host does not issue 3rd CSPLIT,			SS:Free/x
	because host already receives ERR
	on previous microframe.
uFrame M+8		SSPLIT(retry)
	st1	SSPLIT(retry)
	st1		st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0

sh1

SS:Pending/x

uFrame M+9

OUT

DATA0

ACK

			CS:Ready/ack
uFrame M+10	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
		ACK	CS:Old/ack
	ch2	ACK	ch2
	ch2
1

Figure A-53. Normal FS/LS DATA0/1 Smash

FS/LS device

(data toggle) 0

498

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

SS:Pending/x

uFrame M+1

OUT

DATA0

ACK

				CS:Ready/trans_errTRANS_ERR
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
		ERR	ch4	CS:Old/trans_err
	ch4	ERR	ch4
	ch4
	TRANS_ERR on FS/LS
	ce2->ce3
uFrame M+3 Host does not issue 2nd CSPLIT,				CS:Free/x
	because host already receives ERR
	on previous microframe.
uFrame M+4 Host does not issue 3rd CSPLIT,				SS:Free/x
	because host already receives ERR
	on previous microframe.
uFrame M+8		SSPLIT(retry)
	st1	SSPLIT(retry)
	st1		st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

SS:Pending/x

uFrame M+9

OUT

DATA0

ACK

			CS:Ready/ack
uFrame M+10	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
		ACK	CS:Old/ack
	ch2	ACK	ch2
	ch2
1

Figure A-54. Normal FS/LS ACK Smash

FS/LS device

(data toggle) 0

Device does

not receive

this data.

Data toggle is still ‘1’.

499

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

SS:Pending/x

FS/LS device

(data toggle) 0

uFrame M+1

OUT

DATA0

ACK

			CS:Ready/ack
uFrame M+2	CSPLIT
ct1		ct1
		ct1
ct2	OUT	ct2
		ct2
			Does not match this
			CSPLIT on first
			entry of CS.Then
TRANS_ERR			HUB does not
TRANS_ERR			respond any packet.
ce1->ce6			respond any packet.
ce1->ce6
ct1	CSPLIT(retry imm.)
ct1		ct1
		ct1
ct2	OUT	ct2
		ct2
ch2	ACK	ch2	CS:Old/ack
ch2
1
uFrame M+3 Host does not issue 2nd CSPLIT,			CS:Free/x
because host already receives ACK
on previous microframe.
uFrame M+4 Host does not issue 3rd CSPLIT,			SS:Free/x
because host already receives ACK
on previous microframe.

Figure A-55. Searching No Smash

500

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(SS: start sp. status	device
(data toggle)			CS: comp. sp. status)	device
			CS: comp. sp. status)	(data toggle)
0			SS:Free/x	0
uFrame M	st1	SSPLIT	st1
			st1
	st2	OUT	st2
			st2
	sd1	DATA0	sh1
			sh1
			SS:Pending/x
uFrame M+1

OUT

DATA0

ACK

uFrame M+2	ct1	CSPLIT	ct1	CS:Ready/ack
			ct1	CS:Ready/ack
	ct2	OUT	ct2
			ct2
	ch6	NYET	ch5
	ch6
uFrame M+3	ct1	CSPLIT
	ct1		ct1
			ct1
	ct2	OUT	ct2
			ct2
		ACK	ch2	CS:Old/ack
	ch2	ACK	ch2
	ch2
1
uFrame M+4 Host does not issue 3rd CSPLIT,				SS:Free/x
	because host already receives ACK			CS:Free/x
	on previous microframe.

uFrame M+5

Figure A-56. CS Earlier No Smash(HS NYET and FS/LS Handshake Packet is Done by M+2)

501

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

0
uFrame M	st1	SSPLIT
	st2	OUT
	sd1	DATA0
uFrame M+1

uFrame M+2	ct1	CSPLIT
	ct2	OUT
	ch6	NYET
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT
	ct2	OUT
	ch6	NYET
	ch6
uFrame M+4	ct1	CSPLIT
	ct1	CSPLIT
	ct2	OUT
	ch2	ACK
	ch2
1
uFrame M+5

Hub

(SS: start sp. status CS: comp. sp. status)

SS:Free/x

st1

st2

sh1

SS:Pending/x

ct1

ct2

ch5

OUT

FS/LS device

(data toggle) 0

ct1	DATA0
ct2	1
	ACK
ch5	CS:Ready/ack
	CS:Ready/ack
	SS:Free/x
ct1
ct2
ch2	CS:Old/ack
ch2
	CS:Free/x

Figure A-57. CS Earlier No Smash(HS NYET and FS/LS Handshake Packet is Done by M+3)

502

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