LPC1313 datasheet(49/62 Pages) NXP

49 / 62 page

LPC1311_13_42_43

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Product data sheet

Rev. 3 — 10 August 2010

49 of 62

NXP Semiconductors

LPC1311/13/42/43

32-bit ARM Cortex-M3 microcontroller

10.7 USB interface (LPC1342/43 only)

[1]

Characterized but not implemented as production test. Guaranteed by design.

Table 18.

Dynamic characteristics: USB pins (full-speed)

CL = 50 pF; Rpu = 1.5 k

Ω on D+ to VDD, unless otherwise specified.

Symbol

Parameter

Conditions

Min

Typ

Max

Unit

rise time

10 % to 90 %

8.5

13.8

fall time

10 % to 90 %

7.7

13.7

tFRFM

differential rise and fall time

matching

tr /tf

109

VCRS

output signal crossover voltage

1.3

2.0

tFEOPT

source SE0 interval of EOP

see Figure 25

160

175

tFDEOP

source jitter for differential transition

to SE0 transition

see Figure 25

−2-

tJR1

receiver jitter to next transition

−18.5

+18.5

tJR2

receiver jitter for paired transitions

10 % to 90 %

−9-

tEOPR1

EOP width at receiver

must reject as

EOP; see

Figure 25

[1] 40

--ns

tEOPR2

EOP width at receiver

must accept as

EOP; see

Figure 25

[1] 82

--ns

Fig 25. Differential data-to-EOP transition skew and EOP width

002aab561

TPERIOD

differential

data lines

crossover point

source EOP width: tFEOPT

receiver EOP width: tEOPR1, tEOPR2

crossover point

extended

differential data to

SE0/EOP skew

× TPERIOD + tFDEOP

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