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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		Hub	FS/LS
(data toggle)		(status)	device
			(data toggle)
0		Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0

TRANS_ERR

se1

TRANS_ERR

se2->se4

SSPLIT(retry)

st1

st1 st2 OUT/SETUPst2 sd1 DATA0

TRANS_ERR

se1

TRANS_ERR

se2->se4

SSPLIT(retry)

st1

st1 st2 OUT/SETUPst2 sd1 DATA0

TRANS_ERR

se1

TRANS_ERR

se2->se5

ENDPOINT HALT

Figure A-3. Normal HS DATA0/1 3 Strikes Smash

443

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
	ACK	sh1	Pending/x

TRANS_ERR se2->se4

st1	SSPLIT(retry)
		st1

st2	OUT/SETUPst2

sd1 DATA0		sd1

sh1	ACK	sh2

CSPLIT

ct1

ct1 ct2 OUT/SETUPct2

ch3	ACK	ch3
ch3

Hub ignores this DATA0. (Hub already has this data.)

Ready/ack

Old/ack

OUT/SETUP

DATA0

ACK

Figure A-4. Normal HS ACK(S) Smash(case 1)

444

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
	ACK	sh1
TRANS_ERR
se2->se4
st1	SSPLIT(retry)
st1		st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh2
sh1

CSPLIT

ct1

ct1 ct2 OUT/SETUPct2

ch3	ACK	ch3
ch3

Hub	FS/LS
(status)	device
	(data toggle)
Old/x	0

Pending/x

OUT/SETUP

DATA0

ACK

Ready/ack

Hub ignores this DATA0. (Hub already has this data.)

Old/ack

Figure A-5. Normal HS ACK(S) Smash(case 2)

445

Universal Serial Bus Specification Revision 2.0

Host

(data toggle)

st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
	ACK	sh1

TRANS_ERR

se2->se4

SSPLIT(retry)

st1

st1 st2 OUT/SETUPst2

sd1 DATA0	sd1

ACK sh2

TRANS_ERR

se2->se4

SSPLIT(retry)

st1

st1 st2 OUT/SETUPst2

sd1 DATA0	sd1

ACK sh2

TRANS_ERR

se2->se5

Hub	FS/LS
(status)	device
	(data toggle)
Old/x	0

Pending/x

OUT/SETUP

DATA0

ACK

Ready/ack

Hub ignores this DATA0. (Hub already has this data.)

ENDPOINT HALT

Figure A-6. Normal HS ACK(S) 3 Strikes Smash

446

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh1	Pending/x
sh1				OUT/SETUP
				OUT/SETUP
				DATA0
				1

ACK

Ready/ack

CSPLIT

ct1

ct2 OUT/SETUP

Hub ignores this OUT/SETUP. (no match the address field.)

TRANS_ERR

ce2->ce3

CSPLIT(retry imm.)

ct1

ct1 ct2 OUT/SETUPct2

	ACK	Old/ack
ch3	ACK	ch3
ch3

Figure A-7. Normal HS CSPLIT Smash

447

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh1	Pending/x
sh1				OUT/SETUP
				OUT/SETUP
				DATA0
				1

ACK

Ready/ack

CSPLIT

ct1

ct2 OUT/SETUP

Hub ignores this OUT/SETUP. (no match the address field.)

TRANS_ERR

ce2->ce3

CSPLIT(retry imm.)

ct1

ct2 OUT/SETUP

Hub ignores this OUT/SETUP. (no match the address field.)

TRANS_ERR

ce2->ce3

CSPLIT(retry imm.)

ct1

ct2 OUT/SETUP

Hub ignores this OUT/SETUP. (no match the address field.)

TRANS_ERR

ce2->ce4

ENDPOINT HALT

Figure A-8. Normal HS CSPLIT 3 Strikes Smash

448

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh1	Pending/x
sh1				OUT/SETUP
				OUT/SETUP
				DATA0
				1

ACK

Ready/ack

CSPLIT

ct1

ct1 ct2 OUT/SETUPct2

Old/ack

ACK ch3

TRANS_ERR

ce2->ce3

CSPLIT(retry imm.)

ct1

ct1 ct2 OUT/SETUPct2

ch3	ACK	ch3
ch3

Figure A-9. Normal HS ACK(C) Smash

449

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh1	Pending/x
sh1				OUT/SETUP
				OUT/SETUP
				DATA0
				1

ACK

Ready/ack

CSPLIT

ct1

ct1 ct2 OUT/SETUPct2

Old/ack

ACK ch3

TRANS_ERR

ce2->ce3

CSPLIT(retry imm.)

ct1

ct1 ct2 OUT/SETUPct2

ACK ch3

TRANS_ERR

ce2->ce3

CSPLIT(retry imm.)

ct1

ct1 ct2 OUT/SETUPct2

ACK ch3

TRANS_ERR

ce2->ce4

ENDPOINT HALT

Figure A-10. Normal S ACK(C) 3 Strikes Smash

450

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh1	Pending/x
sh1
				OUT/SETUP
				DATA0
				TRANS_ERR
				TRANS_ERR
ct1	CSPLIT	ct1
		ct1
ct2	OUT/SETUPct2
	OUT/SETUPct2
ch1	NYET	ch1		OUT/SETUP(local retry)
ch1
				DATA0
				1
				ACK
			Ready/ack
ct1	CSPLIT(retry)
ct1		ct1
		ct1
ct2	OUT/SETUPct2
	OUT/SETUPct2
	ACK	ch3	Old/ack
ch3	ACK	ch3
ch3
1

Figure A-11. Normal FS/LS DATA0/1 Smash

451

Universal Serial Bus Specification Revision 2.0

Host			Hub	FS/LS
(data toggle)			(status)	device
				(data toggle)
0			Old/x	0
st1	SSPLIT	st1
		st1
st2	OUT/SETUPst2
	OUT/SETUPst2
sd1	DATA0	sd1
		sd1
sh1	ACK	sh1	Pending/x
sh1
				OUT/SETUP
				DATA0
				TRANS_ERR
				TRANS_ERR
ct1	CSPLIT	ct1
		ct1
ct2	OUT/SETUPct2			OUT/SETUP(local retry)
	OUT/SETUPct2			OUT/SETUP(local retry)
ch1	NYET	ch1		DATA0
ch1
				TRANS_ERR
				TRANS_ERR
				OUT/SETUP(local retry)
				DATA0
				TRANS_ERR
				TRANS_ERR
ct1	CSPLIT(retry)		Ready/stall	3 TIMES TRANS_ERR
ct1		ct1
		ct1
ct2	OUT/SETUPct2
	OUT/SETUPct2
	STALL	ch2	Old/stall
ch2	STALL	ch2
ch2

ENDPOINT HALT

Figure A-12. Normal FS/LS DATA0/1 3 Strikes Smash

452

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