Datasheet

LPC1311_13_42_43 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 5 — 6 June 2012 58 of 74
NXP Semiconductors
LPC1311/13/42/43
32-bit ARM Cortex-M3 microcontroller
10.8 USB interface (LPC1342/43 only)
[1] Characterized but not implemented as production test. Guaranteed by design.
Table 20. Dynamic characteristics: USB pins (full-speed)
C
L
= 50 pF; R
pu
= 1.5 k Ω on D+ to V
DD
, unless otherwise specified. 3.0 V ≤ V
DD
≤ 3.6 V
Symbol Parameter Conditions Min Typ Max Unit
t
r
rise time 10 % to 90 % 8.5 - 13.8 ns
t
f
fall time 10 % to 90 % 7.7 - 13.7 ns
t
FRFM
differential rise and fall time
matching
t
r
/t
f
--109%
V
CRS
output signal crossover voltage 1.3 - 2.0 V
t
FEOPT
source SE0 interval of EOP see Figure 31 160 - 175 ns
t
FDEOP
source jitter for differential transition
to SE0 transition
see Figure 31 −2-+5ns
t
JR1
receiver jitter to next transition −18.5 - +18.5 ns
t
JR2
receiver jitter for paired transitions 10 % to 90 % −9-+9ns
t
EOPR1
EOP width at receiver must reject as
EOP; see
Figure 31
[1]
40 - - ns
t
EOPR2
EOP width at receiver must accept as
EOP; see
Figure 31
[1]
82 - - ns
Fig 31. Differential data-to-EOP transition skew and EOP width
002aab561
T
PERIOD
differential
data lines
crossover point
source EOP width: t
FEOPT
receiver EOP width: t
EOPR1
, t
EOPR2
crossover point
extended
differential data to
SE0/EOP skew
n × T
PERIOD
+ t
FDEOP