tja1081 NXP Semiconductors, tja1081 Datasheet - Page 12

• Manufacturer Part Number: tja1081
• Description: Flexray Node Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TJA1081_1
Preliminary data sheet
6.2.1 Normal mode
6.2.2 Receive-only mode
6.2.3 Standby mode
6.2.4 Go-to-sleep mode
6.2.5 Sleep mode
In Normal mode the transceiver is able to transmit and receive data via the bus lines BP
and BM. The output of the normal receiver is directly connected to pin RXD.
Transmitter behavior in Normal mode, with no time-out present on pins TXEN and BGE
and the temperature flag not set (TEMP HIGH = 0; see
In this mode, pin INH is set HIGH.
Table 8.
In Receive-only mode the transceiver can only receive data. The transmitter is disabled,
regardless of the voltage levels on pins BGE and TXEN.
In this mode, pin INH is set HIGH.
Standby mode is a low-power mode featuring very low current consumption. In this mode,
the transceiver cannot transmit or receive data. The low-power receiver is activated to
monitor the bus for wake-up patterns.
A transition to Standby mode can be triggered by applying the appropriate levels on pins
EN and STBN (see
(see
In this mode, pin INH is set HIGH.
If the wake flag is set, pins RXEN and RXD are driven LOW; otherwise pins RXEN and
RXD are set HIGH (see
In this mode, the transceiver behaves as in Standby mode. If this mode is selected for a
time longer than the go-to-sleep hold time (t
previously cleared, the transceiver will enter Sleep mode, regardless of the voltage on
pin EN.
Sleep mode is a low-power mode. The only difference between Sleep mode and Standby
mode is that pin INH is set floating in Sleep mode. A transition to Sleep mode will be
triggered from all other modes if the UV
If an undervoltage is detected on pin V
by a positive edge on pin STBN, provided that V
BGE
L
X
H
H
Figure 5
TXEN
X
H
L
L
Transmitter function table
and
TXD
X
X
H
L
Section
Figure 5
Rev. 01 — 15 April 2009
Section
Transmitter
transmitter is disabled
transmitter is disabled
transmitter is enabled; the bus lines are actively driven; BP is driven
HIGH and BM is driven LOW
transmitter is enabled; the bus lines are actively driven; BP is driven
LOW and BM is driven HIGH
6.2.5).
and
6.3).
Table
CC
4) or if an undervoltage is detected on pin V
VIO
or V
flag or the UV
h(gotosleep)
BAT
IO
while V
and (V
) and the wake flag has been
Table
IO
VBAT
CC
is present, the wake flag is set
or V
9), is detailed in
flag is set (see
FlexRay node transceiver
BAT
) are present.
© NXP B.V. 2009. All rights reserved.
TJA1081
Table
Table
12 of 36
CC
6).
8.