TLE9222 datasheet(18/43 Pages) INFINEON

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Data Sheet

Rev. 1.0 2015-06-12

TLE9222

Functional Description

Figure 11 Alternative wake-up pattern

4.6.2

Wake-up by Payload

In addition to wake-up detection by wake-up patterns, the TLE9222 also supports wake-up requests by a

specific payload within the data field of a FlexRay communication frame with data transmission rate of

10 Mbit/s.

A dedicated Byte Start Sequence (BSS) is transmitted before each byte of the payload within the FlexRay data

frame. The BSS consists of one “high” bit followed by one “low” bit. For transmitting a “Data_0” byte on the

FlexRay bus, the FlexRay controller sends 10 bits, the “high” bit and the “low” bit as part of the BSS followed

by the eight “low” data bits (HL= BSS; LLLLLLLL= “Data_0”). For sending a “Data_1” byte the FlexRay controller

sends the “high” bit and the “low” bit, followed by the eight consecutive “high” data bits (HL = BSS;

HHHHHHHH = “Data_1”) (see Figure 12).

Figure 12 Wake-up by payload

TLE9222_WAKEUP_ALTERNATIVE_V00

uBM

uBP

High

Low

Data_0

Data_1

Data_0

Data_1

dWU0Detect

dWUIdleDetect

Idle

dWUIdleDetect

Idle

dWUTimeout

Wake-up symbol

Wake-up pattern

uData0_LP

uBus = uBP - uBM

dBDWakeupReactionRemote

dWUInterrupt

TLE9222_WAKEUP_PAYLOAD_V01

dWUTimeout

uData0_LP

„Data_1"

„Data_0"

dWU0Detect

dWUIdleDetect

dWU0Detect

Wake-up payload content:

0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00, 0x00,

0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF

dWUIdleDetect

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