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UPD720122 Datasheet(PDF) 71 Page - NEC

No. de pieza UPD720122
Descripción Electrónicos  MOS Integrated Circuit
PDF  82 Pages
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Fabricante Electrónico  NEC [NEC]
Página de inicio  http://www.nec.com/
Logo NEC - NEC

UPD720122 Datasheet(HTML) 71 Page - NEC

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Data Sheet S16685EJ2V0DS
71
µPD720122
(4) USB connection sequence on USB 2.0 bus
Figure 2-13. USB Connection Sequence on USB 2.0 Bus
tHDS
tSCA
tCKO
tCKI
tSCS
tFCA
Chirp K device out
Reversion to high-speed mode
FS J
Pull-up is active.
T0
USB bus
USBRST
SPMODE
tSSC
tCSO
tCSI
tRHA
tFSC
Chirp state from host/hub
Reset Complete
KJ
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)
tSPD
tSCA
tCKO
tCKI
tSCS
tDRS
Chirp K device out
Reversion to full-speed mode
FS J
Pull-up is inactive.
T0
USB bus
USBRST
SPMODE
tFCA
tCSR
High-speed packet



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