LPC2921_10 Datasheet, PDF (66/84 Pages) NXP Semiconductors – ARM9 microcontroller with CAN, LIN, and USB

NXP Semiconductors
LPC2921/2923/2925
ARM9 microcontroller with CAN, LIN, and USB
9.2 USB interface
Table 34. Dynamic characteristics: USB pins (full-speed)
C_L = 50 pF; R_pu = 1.5 kΩ on D+ to V_DD(3V3), unless otherwise specified.
Symbol
Parameter
Conditions
t_r
t_f
t_FRFM
rise time
fall time
differential rise and fall time
matching
10 % to 90 %
10 % to 90 %
t_r/t_f
V_CRS
t_FEOPT
t_FDEOP
output signal crossover voltage
source SE0 interval of EOP
source jitter for differential transition
to SE0 transition
see Figure 23
see Figure 23
t_JR1
t_JR2
t_EOPR1
receiver jitter to next transition
receiver jitter for paired transitions
EOP width at receiver
10 % to 90 %
must reject as
EOP; see
Figure 23
t_EOPR2
EOP width at receiver
must accept as
EOP; see
Figure 23
[1] Characterized but not implemented as production test. Guaranteed by design.
Min
8.5
7.7
-
1.3
160
−2
−18.5
−9
[1] ₄₀
[1] ₈₂
Typ
Max
Unit
-
13.8
ns
-
13.7
ns
-
109
%
-
2.0
V
-
175
ns
-
+5
ns
-
+18.5 ns
-
+9
ns
-
-
ns
-
-
ns
T_PERIOD
differential
data lines
crossover point
crossover point
extended
differential data to
SE0/EOP skew
n × T_PERIOD + t_FDEOP
Fig 23. Differential data-to-EOP transition skew and EOP width
source EOP width: t_FEOPT
receiver EOP width: t_EOPR1, t_EOPR2
002aab561
LPC2921_23_25_3
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 14 April 2010
© NXP B.V. 2010. All rights reserved.
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