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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

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Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
Host			(SS: start sp. status	device
(data toggle)			(SS: start sp. status
(data toggle)			CS: comp. sp. status)
			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
		NYET	ch5
	TRANS_ERR
	ce1->ce6
	ct1	CSPLIT(retry imm.)
	ct1		ct1
			ct1
	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-58. CS Earlier HS NYET Smash

503

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
Host			(SS: start sp. status	device
(data toggle)			(SS: start sp. status
(data toggle)			CS: comp. sp. status)
			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
		NYET	ch5
	TRANS_ERR
	ce1->ce6
	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
		NYET	ch5
	TRANS_ERR
	ce1->ce6
	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
		NYET	ch5
	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-59. CS Earlier HS NYET 3 Strikes Smash

504

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
uFrame M+1
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
	ch6	NYET	ch5
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
	ch6	NYET	ch5
	ch6
uFrame M+4	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
	ce7	NYET	ch5
	ce7
	ce3
uFrame M+8		SSPLIT(retry)
	st1	SSPLIT(retry)
	st1		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

OUT

DATA0

SS:Free/x

Hub stops sending this data and forces a bit stuffing error.

SS:Pending/x

FS/LS device

(data toggle) 0

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-60. Abort and Free Abort(FS/LS Transaction is Continued at End of M+3)

505

Universal Serial Bus Specification Revision 2.0

Host

(data toggle) 0

uFrame M

st1

st2

sd1

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

Hub

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

SS:Free/x

SSPLIT st1

OUT st2

DATA0 sh1

SS:Pending/x

CSPLIT

ct1

OUT

ct2

NYET ch5

CSPLIT

ct1

OUT

ct2

NYET ch5

SS:Free/x

Hub frees this transaction from SS.

CSPLIT

ct1

OUT

ct2

NYET ch5

FS/LS device

(data toggle) 0

SSPLIT(retry)

st1

OUT

st2

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-61. Abort and Free Free(FS/LS Transaction is not Started at End of M+3)

506

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

				CS:Ready/nak
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	OUT	ct2
			ct2
		NAK	ch3	CS:Old/nak
	ch3	NAK	ch3
	ch3
uFrame M+3 Host does not issue 2nd CSPLIT,				CS:Free/x
	because host already receives NAK
	on previous microframe.
uFrame M+4 Host does not issue 3rd CSPLIT,				SS:Free/x
	because host already receives NAK
	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

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

FS/LS device

(data toggle) 0

OUT

DATA0

NAK

OUT

DATA0

ACK

Figure A-62. Device Busy No Smash(FS/LS NAK)

507

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

STALL

CS:Ready/stall

uFrame M+2

ct1	CSPLIT	ct1
		ct1
ct2	OUT	ct2
		ct2
ch1	STALL	ch1
ch1
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-63. Device Stall No Smash(FS/LS STALL)

508

Universal Serial Bus Specification Revision 2.0

A.4 Interrupt IN Transaction Examples

Legend:

(S): Start Split

(C): Complete Split

Summary of cases for Interrupt OUT transaction

•Normal cases

Case

No smash

(FS/LS data packet is on M+1)

HS SSPLIT smash

HS SSPLIT 3 strikes smash

HS IN(S) smash

HS IN(S) 3 strikes smash

HS CSPLIT smash

HS CSPLIT 3 strikes smash

HS IN(C) smash

HS IN(C) 3 strikes smash

HS DATA0/1 smash

HS DATA0/1 3 strikes smash

FS/LS IN smash

FS/LS IN 3 strikes smash

FS/LS DATA0/1 smash

FS/LS DATA0/1 3 strikes smash

FS/LS ACK smash

FS/LS ACK 3 strikes smash

Reference

Figure

Figure A-64

Figure A-65

No figure

Figure A-66

Figure A-67

Figure A-68

Figure A-69

Figure A-70

No figure

Figure A-71

No figure

Figure A-72

No figure

Similar Figure

Figure A-65

Figure A-66

Figure A-67

509

Universal Serial Bus Specification Revision 2.0

• Searcing

	Case	Reference	Similar Figure
		Figure

	No smash	Figure A-73

•CS(Complete-split transaction) earlier cases

Case	Reference	Similar Figure
	Figure

No smash (HS MDATA and FS/LS transaction is on M+1 and M+2)

No smash (HS NYET and FS/LS transaction is on M+2)

No smash (HS NYET and MDATA and FS/LS transaction is on M+2 and M+3)

No smash (HS NYET and FS/LS transaction is on M+3)

HS NYET smash

HS NYET 3 strikes smash

Figure A-74

Figure A-75

Figure A-76

Figure A-77

Figure A-78

Figure A-79

•Abort and Free cases

Case	Reference	Similar Figure
	Figure

No smash and abort (HS NYETand FS/LS transaction is continued at end of M+3)

No smash and free(HS NYETand FS/LS transaction is not started at end of M+3)

Figure A-80

Figure A-81

•FS/LS transaction error cases

Case	Reference	Similar Figure
	Figure

HS ERR smash		Figure A-68

HS ERR 3 strikes smash		Figure A-69

510

Universal Serial Bus Specification Revision 2.0

• Device busy cases

	Case	Reference	Similar Figure
		Figure

	No smash(HS NAK(C))	Figure A-82

	HS NAK(C) smash		Figure A-68

	HS NAK(C) 3 strikes smash		Figure A-69

	FS/LS NAK smash		Figure A-71

	FS/LS NAK 3 strikes smash	No figure

•Device stall cases

Case	Reference	Similar Figure
	Figure

No smash

HS STALL(C) smash

HS STALL(C) 3 strikes smash

FS/LS STALL smash

FS/LS STALL 3 strikes smash

Figure A-83

No figure

Figure A-68

Figure A-69

Figure A-71

511

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	IN	st2
			st2
			SS:Pending/x
uFrame M+1

				CS:Ready/lastdata
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch7	DATA0	cd1	CS:Old/lastdata
	ch7
1
uFrame M+3 Host does not issue 2nd CSPLIT,				CS:Free/x
	because host already receives
	DATA0 on previous microframe.

FS/LS device

(data toggle) 0

DATA0

ACK

uFrame M+4 Host does not issue 3rd CSPLIT,	SS:Free/x
because host already receives
DATA0 on previous microframe.

uFrame M+5

Figure A-64. Normal No Smash(FS/LS Data Packet is on M+1)

512

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