TJA1080ATS/1 NXP [NXP Semiconductors], TJA1080ATS/1 Datasheet - Page 19

• Manufacturer Part Number: TJA1080ATS/1
• Description: FlexRay transceiver
• Manufacturer: NXP [NXP Semiconductors]

NXP Semiconductors
TJA1080A_2
Preliminary data sheet
6.3.5 Star-sleep mode
6.3.6 Star-locked mode
6.4.1 Node configuration
6.4.2 Star configuration
6.4 Start-up
This mode is entered if one of the following events occur:
In Star-sleep mode the transceiver has entered a low power mode. In this mode the
current consumption is as low as possible to prevent the car battery from discharging. The
inhibit switches are switched off.
In this mode the wake flag wakes the transceiver. A detailed description of the wake-up
mechanism is given in
If pins V
wake flag.
This mode is entered if one of the following events occur:
This mode is a fail-silent mode and in this mode the transmitter is disabled.
The TJA1080A initialization is independent of the way the voltage supplies V
V
Node configuration can be selected by applying a voltage lower than 0.3V
TRXD0 and TRXD1 during power-on. Node configuration is latched by resetting the
PWON flag while the voltage on pins TRXD0 and TRXD1 is lower than 0.3V
Section 6.7.4
Star configuration can be selected by applying a voltage higher than 0.7V
TRXD0 or TRXD1 during power-on. Star configuration is latched by resetting the PWON
flag while one of the voltages on pins TRXD0 or TRXD1 is higher than 0.7V
Section 6.7.4
Star-standby mode to Star-idle mode.
•
•
•
•
•
IO
ramp up. A dedicated power-up sequence is not necessary.
From any mode if an undervoltage on pin V
If the transceiver is in Star-idle mode and no activity is detected on the bus lines and
pins TXEN, TRXD0 and TRXD1 for longer than t
If Star-locked mode is active for longer than t
If the transceiver is in Star-transmit mode and activity on pin TXEN is detected for
longer than t
If the transceiver is in Star-receive mode and activity is detected on the bus lines for
longer than t
IO
and V
for (re)setting the PWON flag.
for (re)setting the PWON flag. In this case the transceiver goes from
BUF
to(tx-locked)
to(rx-locked)
are within their operating range, pins RXD and RXEN will indicate the
Rev. 02 — 26 August 2008
Section
.
.
6.5.
CC
to(locked-sleep)
is present for longer than t
to(idle-sleep)
.
.
TJA1080A
FlexRay transceiver
© NXP B.V. 2008. All rights reserved.
BUF
BUF
BUF
BUF
BAT
det(uv)(VCC)
to pins
to pins
. See
; see
, V
CC
19 of 50
and
.