參數(shù)資料
型號(hào): UPD720122
廠商: NEC Corp.
英文描述: MOS Integrated Circuit
中文描述: 馬鞍山集成電路
文件頁(yè)數(shù): 71/82頁(yè)
文件大?。?/td> 650K
代理商: UPD720122
Data Sheet S16685EJ2V0DS
71
μ
PD720122
(4) USB connection sequence on USB 2.0 bus
Figure 2-13. USB Connection Sequence on USB 2.0 Bus
t
HDS
t
SCA
t
CKO
t
CKI
t
SCS
t
FCA
Chirp K device out
Reversion to high-speed mode
FS J
Pull-up is active.
T
0
USB bus
USBRST
SPMODE
t
SSC
t
CSO
t
CSI
t
RHA
t
FSC
Chirp state from host/hub
Reset Complete
K
J
K
J
K
J
K
J
(5) Bus reset sequence (1)
The bus reset sequence when connected to a USB 1.1 bus is shown below.
Figure 2-14. Bus Reset Sequence (1)
t
SPD
t
SCA
t
CKO
t
CKI
t
SCS
t
DRS
Chirp K device out
Reversion to full-speed mode
FS J
Pull-up is inactive.
T
0
USB bus
USBRST
SPMODE
t
FCA
t
CSR
High-speed packet
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