TJA1080ATSSLASH2SLASHT datasheet(21/49 Pages) NXP

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TJA1080A

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Product data sheet

Rev. 5 — 24 February 2011

21 of 49

NXP Semiconductors

TJA1080A

FlexRay transceiver

6.5.4 Local wake-up via pin WAKE

If the voltage on pin WAKE is lower than Vth(det)(WAKE) for longer than twake(WAKE) (falling

edge on pin WAKE) a local wake-up event on pin WAKE is detected. At the same time,

the biasing of this pin is switched to pull-down.

If the voltage on pin WAKE is higher than Vth(det)(WAKE) for longer than twake(WAKE), the

biasing of this pin is switched to pull-up, and no local wake-up will be detected.

Each interruption is 130 ns.

The transition time from DATA_0 to DATA_1 and from DATA_1 to DATA_0 is about 20 ns.

The TJA1080A wake-up flag will be set with the following pattern:

FFh, FFh, FFh, FFh, FFh, 00h, 00h, 00h, 00h, 00h,

FFh, FFh, FFh, FFh, FFh, FFh

Fig 9.

Minimum bus pattern for bus wake-up

015aaa043

Vdif

0 V

−1500

wake-up

+1500

870

870 ns 870 ns

770

130 ns

130

μs

Sleep mode: VIO and (VBAT or VCC) still provided.

Fig 10. Local wake-up timing via pin WAKE

001aae443

VBAT

RXD and

RXEN

INH1 and

INH2

0 V

WAKE

twake(WAKE)

pull-up

twake(WAKE)

pull-down

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