tja1080 NXP Semiconductors, tja1080 Datasheet - Page 20

• Manufacturer Part Number: tja1080
• Description: Flexray Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TJA1080_2
Product data sheet
7.5.1 Node configuration
7.5.2 Star configuration
7.5.3 Bus wake-up
7.5 Wake-up mechanism
In Sleep mode (pins INH1 and INH2 are switched off), the transceiver will enter Standby
mode or Go-to-sleep mode (depending on the value at pin EN), if the wake flag is set.
Consequently, pins INH1 and INH2 are switched on.
If no undervoltage is present on pins V
to the mode indicated on pins EN and STBN.
In Standby, Go-to-sleep and Sleep mode pins RXD and RXEN are driven LOW if the wake
flag is set.
In Star-sleep mode (pins INH1 and INH2 are switched off), the transceiver will enter
Star-idle mode (pins INH1 and INH2 are switched on) if the wake flag is set. After entering
Star-idle mode the transceiver monitors for activity to choose the appropriate mode
transition (see
Bus wake-up is detected if two consecutive DATA_0 of at least t
an idle or DATA_1 of at least t
t
det(wake)idle
Fig 7. Bus wake-up timing
V
dif
425 mV
are present on the bus lines within t
0 V
Figure
5).
Rev. 02 — 12 July 2007
t
det(wake)Data_0
det(wake)idle
IO
, followed by an idle or DATA_1 of at least
t
and V
det(wake)idle
det(wake)tot
BAT
t
det(wake)tot
, the transceiver switches immediately
t
det(wake)Data_0
.
det(wake)DATA_0
FlexRay transceiver
t
det(wake)idle
© NXP B.V. 2007. All rights reserved.
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