TJA1082 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 6 — 28 November 2012 6 of 38
NXP Semiconductors
TJA1082
FlexRay node transceiver
Table 4 describes the behavior of the transmitter in Normal mode, when the temperature
flag (TEMP HIGH) is not set and with no time-out on pin TXEN. Transmitter behavior is
illustrated in Figure 14
.
The transmitter is activated during the first LOW level on pin TXD while pin BGE is HIGH
and pin TXEN is LOW.
In Normal mode, the normal receiver output is connected directly to pin RXD (see
Table 5
). Receiver behavior is illustrated in Figure 15.
When V
IO
and V
CC
are within their operating ranges, pin ERRN indicates the status of the
error flag. See Section 6.8
for a detailed description of error signalling in Normal mode.
Fig 3. Timing diagram in Normal mode
015aaa002
TXD
BGE
RXD
BM
BP
TXEN
Table 4. Transmitter operation in Normal mode
BGE TXEN TXD Bus state Transmitter
L X X idle transmitter is disabled
X H X idle transmitter is disabled
H L H DATA_1 transmitter is enabled; the bus lines are actively driven;
BP is driven HIGH and BM is driven LOW
H L L DATA_0 transmitter is enabled; the bus lines are actively driven;
BP is driven LOW and BM is driven HIGH
Table 5. Behavior of normal receiver in Normal mode
Bus state RXD
DATA_0 L
DATA_1 H
idle H
