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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

(data toggle)

0
uFrame M	st1	SSPLIT	st1
			st1
	st2	IN	st2
			st2
uFrame M+1

uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch6	NYET	ch4
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch7	DATA0	cd1
	ch7

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

because host already receives DATA0 on previous microframe.

uFrame M+5

Hub

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

SS:Free/x

SS:Pending/x

CS:Ready/lastdata

CS:Old/lastdata

SS:Free/x

CS:Free/x

FS/LS device

(data toggle) 0

DATA0

ACK

Figure A-75. CS Earlier No Smash(HS NYET and FS/LS Data Packet is on M+2)

523

Universal Serial Bus Specification Revision 2.0

Host

(data toggle) 0

uFrame M

st1

st2

uFrame M+1

uFrame M+2

ct1

ct2

ch6

uFrame M+3

ct1

ct2

ch5

uFrame M+4

ct1

ct2

ch7

1 uFrame M+5

Hub

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

SS:Free/x

SSPLIT	st1

IN	st2

SS:Pending/x

CSPLIT	ct1
	ct1
IN	ct2
	ct2
NYET	ch4
		CS1:Ready/moredata
CSPLIT	ct1	CS2:Ready/lastdata
	ct1
IN	ct2
	ct2
MDATA	cd2	CS1:Old/moredata
CSPLIT		SS:Free/x
CSPLIT	ct1	CS1:Free/x
	ct1	CS1:Free/x
IN	ct2
	ct2
DATA0	cd1	CS2:Old/lastdata
		CS2:Free/x

FS/LS device

(data toggle) 0

DATA0

ACK

Figure A-76. CS Earlier No Smash(HS NYET and MDATA and FS/LS Data Packet is on M+2 and M+3)

524

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

0
uFrame M	st1	SSPLIT
	st2	IN
uFrame M+1

uFrame M+2	ct1	CSPLIT
	ct2	IN
	ch6	NYET
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT
	ct2	IN
	ch6	NYET
	ch6
uFrame M+4	ct1	CSPLIT
	ct1	CSPLIT
	ct2	IN
	ch7	DATA0
	ch7
1
uFrame M+5

Hub

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

SS:Free/x

st1

st2

SS:Pending/x

ct1

ct2

ch4

ct1

ct2

ch4

	CS:Ready/lastdata
	SS:Free/x
ct1
ct2
cd1	CS:Old/lastdata
	CS:Free/x

FS/LS device

(data toggle) 0

DATA0

ACK

Figure A-77. CS Earlier No Smash(HS NYET and FS/LS Data Packet is on M+3)

525

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

0
uFrame M	st1	SSPLIT	st1
			st1
	st2	IN	st2
			st2
uFrame M+1
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
		NYET	ch4
	TRANS_ERR
	ce1->ce8
	ct1	CSPLIT(retry imm.)
	ct1		ct1
			ct1
	ct2	IN	ct2
			ct2
	ch6	NYET	ch4
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch7	DATA0	cd1
	ch7

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

because host already receives DATA0 on previous microframe.

uFrame M+5

Hub

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

SS:Free/x

SS:Pending/x

CS:Ready/lastdata

CS:Old/lastdata

SS:Free/x

CS:Free/x

Figure A-78. CS Earlier HS NYET Smash

FS/LS device

(data toggle) 0

DATA0

ACK

526

Universal Serial Bus Specification Revision 2.0

IN.CSPLIT earlier.HS NYET 3 strikes smash

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

FS/LS device

(data toggle) 0

uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
		NYET	ch4
	TRANS_ERR
	ce1->ce8	CSPLIT(retry imm.)
	ct1	CSPLIT(retry imm.)
	ct1		ct1
			ct1
	ct2	IN	ct2
			ct2
		NYET	ch4
	TRANS_ERR
	ce1->ce8
	ct1	CSPLIT(retry imm.)
	ct1		ct1
			ct1
	ct2	IN	ct2
			ct2

NYET ch4

TRANS_ERR

ce1->ce7

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.

DATA0

CS:Ready/lastdata

ACK

SS:Free/x

CS:Free/x

uFrame M+5

Figure A-79. CS Earlier HS NYET 3 Strikes Smash

527

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

0
uFrame M	st1	SSPLIT	st1
			st1
	st2	IN	st2
			st2
uFrame M+1
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch6	NYET	ch4
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch6	NYET	ch4
	ch6
uFrame M+4	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ce3	NYET	ch4
	ce3
	ce2->ce6
uFrame M+8	st1	SSPLIT(retry)
	st1		st1
			st1
	st2	IN	st2
			st2

uFrame M+9

uFrame M+10	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch7	DATA0	cd1
	ch7
1

Hub

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

SS:Free/x

SS:Pending/x

DATA0

SS:Free/x

FS/LS device

(data toggle) 0

Hub removes this data packet on a buffer and hub does not send ACK.

SS:Pending/x

DATA0

CS:Ready/lastdata

ACK

CS:Old/lastdata

Figure A-80. Abort and Free Abort(HS NYET and FS/LS Transaction is Continued at End of M+3)

528

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

FS/LS device

(data toggle) 0

uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch6	NYET	ch4
	ch6
uFrame M+3	ct1	CSPLIT
	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch6	NYET	ch4
	ch6
uFrame M+4	ct1	CSPLIT		SS:Free/x	Hub frees this transaction from SS.
	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ce3	NYET	ch4
	ce3
	ce2->ce6
uFrame M+8	st1	SSPLIT(retry)
	st1		st1
			st1
	st2	IN	st2
			st2
				SS:Pending/x
uFrame M+9						IN
						IN
						DATA0
				CS:Ready/lastdata		ACK
						1
uFrame M+10	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch7	DATA0	cd1	CS:Old/lastdata
	ch7
1

Figure A-81. Abort and Free Free(HS NYET and FS/LS Transaction is not Started at End of M+3)

529

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
			st1
	st2	IN	st2
			st2
				SS:Pending/x
uFrame M+1				IN
				NAK
				CS:Ready/nak
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ch1	NAK	ch1	CS:Old/nak
	ch1
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	IN	st2
			st2
				SS:Pending/x
uFrame M+9				IN
				DATA0

FS/LS device

(data toggle) 0

			CS:Ready/lastdata	ACK
				1
uFrame M+10	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
		DATA0	CS:Old/lastdata
	ch7	DATA0	cd1
	ch7
1

Figure A-82. Device Busy No Smash(FS/LS NAK)

530

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	SSPLIT
st1		st1
		st1
st2	IN	st2
		st2
		SS:Pending/x
uFrame M+1		IN

STALL

				CS:Ready/stall
uFrame M+2	ct1	CSPLIT	ct1
			ct1
	ct2	IN	ct2
			ct2
	ce2	STALL	ch3	CS:Old/stall
	ce2
	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-83. Device Stall No Smash(FS/LS STALL)

FS/LS device

(data toggle) 0

531

Universal Serial Bus Specification Revision 2.0

A.5	Isochronous OUT Split-transaction Examples

		Case	Reference
			Figure

		Normal: small payload (<=188)	1

		Normal: large payload (> 188)	2

		HS SSPLIT-all corrupted, HS OUT corrupted	3

		HS DATA0 corrupted (small payload)	4

		HS SSPLIT-begin corrupted	5

		HS OUT after the HS SSPLIT-begin is corrupted	6

		HS DATA0 corrupted (large payload)	7

		HS SSPLIT-mid or OUT or DATA0 corrupted	8

532

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