isp1521 NXP Semiconductors, isp1521 Datasheet - Page 40

• Manufacturer Part Number: isp1521
• Description: Hi-speed Universal Serial Bus Hub Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
ISP1521_4
Product data sheet
Fig 11. Source differential data-to-EOP transition skew and EOP width
Fig 12. Receiver differential data jitter
differential
data lines
T
Full-speed timing symbols have a subscript prefix ‘F’, low-speed timing a prefix ‘L’.
T
t
JR
PERIOD
PERIOD
3.3 V
3.3 V
is the jitter reference point.
differential
data lines
0 V
0 V
is the bit duration corresponding with the USB data rate.
is the bit duration corresponding with the USB data rate.
T
T
PERIOD
PERIOD
Fig 13. Receiver SE0 width tolerance
crossover point
t
JR
N
N
differential data to
SE0/EOP skew
T
consecutive
T
PERIOD
transitions
PERIOD
t
DEOP
Rev. 04 — 30 March 2006
t
JR1
differential
data lines
N
3.3 V
T
transitions
0 V
PERIOD
paired
t
JR2
crossover point
extended
t
JR1
t
FST
V
IH(min)
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Hi-Speed USB hub controller
source EOP width: t
receiver EOP width: t
mgr872
t
JR2
ISP1521
EOPT
EOPR
mgr776
mgr871
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