tja1080a NXP Semiconductors, tja1080a Datasheet - Page 18

• Manufacturer Part Number: tja1080a
• Description: Flexray Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TJA1080A_3
Preliminary data sheet
6.3.2 Star-transmit mode
6.3.3 Star-receive mode
6.3.4 Star-standby mode
This mode is entered if one of the following events occur:
In Star-transmit mode the transmitter is enabled and the transceiver can transmit data on
the bus lines and on the TRXD lines. It transmits the data received on pins TXD or TRXD0
and TRXD1, depending on where activity is detected:
This mode is entered if the transceiver is in Star-idle mode and activity has been detected
on the bus lines.
In Star-receive mode the transceiver transmits data received on the bus via the TRXD0
and TRXD1 lines to other transceivers connected to the TRXD lines. The transmitter is
always disabled. RXD, which represents the data on the bus lines, is output at TRXD0 and
TRXD1.
This mode is entered if one of the following events occur:
In Star-standby mode the transceiver has entered a low power mode. In this mode the
current consumption is as low as possible to prevent discharging the capacitor at pin
V
If pins V
wake flag.
•
•
•
•
•
•
BUF
If the transceiver is in Star-idle mode and activity is detected on pin TXEN.
If the transceiver is in Star-idle mode and activity is detected on pins TRXD0 and
TRXD1.
If activity is detected on the TRXD lines, the transceiver transmits data from pins
TRXD0 and TRXD1 to the bus.
If activity is detected on the TXEN, the transceiver transmits data from pin TXD to the
bus and to the TRXD lines.
From Star-idle, Star-transmit or Star-receive modes if the wake flag is set and an
undervoltage on pin V
If the PWON flag is set.
.
IO
and V
BUF
are within their operating range, pins RXD and RXEN will indicate the
Rev. 03 — 15 January 2009
CC
is present for longer than t
to(uv)(VCC)
.
TJA1080A
FlexRay transceiver
© NXP B.V. 2009. All rights reserved.
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