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零件编号 | TJA1080A | ||
描述 | FlexRay transceiver | ||
制造商 | NXP Semiconductors | ||
LOGO | |||
1 Page
TJA1080A
FlexRay transceiver
Rev. 02 — 26 August 2008
Preliminary data sheet
www.datasheet4u.com
1. General description
The TJA1080A is a FlexRay transceiver, which is in line with the FlexRay electrical
physical layer specification V2.1 Rev. A (see Ref. 1). It is primarily intended for
communication systems from 1 Mbit/s to 10 Mbit/s, and provides an advanced interface
between the protocol controller and the physical bus in a FlexRay network.
The TJA1080A can be configured to be used as an active star transceiver or as a node
transceiver.
The TJA1080A provides differential transmit capability to the network and differential
receive capability to the FlexRay controller. It offers excellent EMC performance as well as
high ESD protection.
The TJA1080A actively monitors the system performance using dedicated error and
status information (readable by any microcontroller), as well as internal voltage and
temperature monitoring.
The TJA1080A supports the mode control as used in NXP Semiconductors TJA1054
(see Ref. 2) and TJA1041 (see Ref. 3) CAN transceivers.
The TJA1080A is the next step up from the TJA1080 FlexRay transceiver (Ref. 4). Being
fully pin compatible and offering the same excellent ESD protection, the TJA1080A also
features:
• Improved power-on reset concept
• Improved ElectroMagnetic Emission (EME)
• Support of 70 ns minimum bit time
• Improved bus error detection functionality
This makes the TJA1080A an excellent choice in any kind of FlexRay nodes.
See Section 14 for a detailed overview of differences between the TJA1080 and the
TJA1080A.
2. Features
2.1 Optimized for time triggered communication systems
I Compliant with FlexRay electrical physical layer specification V2.1 Rev. A (see Ref. 1)
I Automotive product qualification in accordance with AEC-Q100
I Data transfer up to 10 Mbit/s
I Support of 70 ns minimum bit time
NXP Semiconductors
TJA1080A
FlexRay transceiver
www.datasheet4u.comTXD
BGE
TXEN
BP
BM
RXEN
RXD
Fig 3. Timing diagram in Normal mode node configuration
001aae439
normal
receive
only standby
receive
only
STBN
EN
0.7VIO
tdet(EN)
td(STBN-INH2)
0.7VIO
td(STBN-RXD)
0.3VIO
tdet(EN)
0.3VIO
normal
ERRN
S2
Fig 4. Timing diagram of control pins EN and STBN
001aag894
The state diagram in node configuration is illustrated in Figure 5.
TJA1080A_2
Preliminary data sheet
Rev. 02 — 26 August 2008
© NXP B.V. 2008. All rights reserved.
8 of 50
NXP Semiconductors
TJA1080A
FlexRay transceiver
www.datasheet4u.com
TXEN activity detected for
longer than tto(tx-locked)
STAR LOCKED
INH1 = HIGH
INH2 = HIGH
idle detected on
the bus lines
and TXEN for longer
than tto(locked-idle)
bus activity detected for
longer than tto(rx-locked)
STAR TRANSMIT
INH1 = HIGH
INH2 = HIGH
time in star
locked longer
than tto(locked-sleep)
idle detected on
TRXD0, TRXD1,
TXEN and the
bus lines
TRXD0, TRXD1,
TXEN activity detected
STAR IDLE
INH1 = HIGH
INH2 = HIGH
idle detected on
TRXD0, TRXD1,
TXEN and the
bus lines
bus activity
detected
wake
flag 1
no acivity on TRXD0,
TRXD1, TXEN and the
bus lines for longer
than tto(idle-sleep)
wake flag 1 or
UVVCC signal 0
STAR RECEIVE
INH1 = HIGH
INH2 = HIGH
STAR SLEEP
INH1 = floating
INH2 = floating
STAR STANDBY(1)
INH1 = HIGH
INH2 = HIGH
from star idle, star
transmit or star receive if
wake flag set and under
voltage present on VCC
for longer than
t > tto(uv)(VCC)
from any mode if UVVCC
flag is set regardless PWON flag
(1) At the first battery connection the transceiver will enter the Star-standby mode.
Fig 6. State diagram in star configuration
001aae441
TJA1080A_2
Preliminary data sheet
Rev. 02 — 26 August 2008
© NXP B.V. 2008. All rights reserved.
16 of 50
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页数 | 30 页 | ||
下载 | [ TJA1080A.PDF 数据手册 ] |
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