TJA1085HN Ver la hoja de datos (PDF) - NXP Semiconductors.

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Fabricante

TJA1085HN

FlexRay active star coupler

NXP Semiconductors. 

NXP Semiconductors

TJA1085

FlexRay active star coupler

Vdif

(mV)

0

-500

< tdet(wake)tot

> tdet(wake)idle

wake-up

> tdet(wake)idle

> tdet(wake)DATA_0

> tdet(wake)DATA_0

+500

0

-500

> tdet(wake)idle

> tdet(wake)idle

> tdet(wake)DATA_0

> tdet(wake)DATA_0

wake-up symbol

wake-up symbol

wake-up pattern

015aaa007

Fig 3. Bus wake-up timing

See Ref. 1 for more details of the wake-up mechanism.

6.4.1.2 Bus wake-up via dedicated FlexRay data frame

The TJA1085 detects a wake-up event when a dedicated data frame emulating a valid

wake-up pattern, as shown in Figure 4, is received.

The Data_0 and Data_1 phases of the emulated wake-up symbol are interrupted by the

Byte Start Sequence (BSS) preceding each byte in the data frame. With a data rate of

10 Mbit/s, the interruption has a maximum duration of 130 ns and does not prevent the

transceiver from recognizing the wake-up pattern in the payload.

For longer interruptions at lower data rates (5 Mbit/s and 2.5 Mbit/s), the wake-up pattern

should be used (see Section 6.4.1.1).

TJA1085

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 1 — 23 October 2012

© NXP B.V. 2012. All rights reserved.

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