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PDF TLE9221SX Data sheet ( Hoja de datos )
| Número de pieza | TLE9221SX | |
| Descripción | FlexRay Transceiver | |
| Fabricantes | Infineon | |
| Logotipo |  |
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TLE9221SX
FlexRay Transceiver
Data Sheet
Rev. 1.10, 2013-07-15
Automotive Power
1 page  
TLE9221SX
Overview
• Transmitter time-out
• Error and wake-up indication on the ERRN output
• Status Information Register to indicate error bits and wake-up bits
• High Impedance bus input in BD_Off condition
1.2 Description
FlexRay is a serial, deterministic bus system for real-time control applications. It is designed for future
requirements of in-vehicle control applications, providing data transmission rates up to 10 Mbit/s. FlexRay is
designed for collision-free data communication. The nodes do not arbitrate and the FlexRay Communication
Controller (CC) guarantees a collision-free bus access during normal operation.
The FlexRay bus system is patent-protected by the international FlexRay consortium. The consortium defines and
publishes the requirements for FlexRay bus systems, for the data-link layer, the physical layer and all other
requisite application layers.
The TLE9221SX FlexRay transceiver is a FlexRay bus driver (BD) and it accomplishes the physical interface
between the Communication Controller and the bus medium. Fully compliant with the FlexRay Electrical Physical
Layer Specification, version 3.0.1 (acronym EPL).
The TLE9221SX supports the following functional classes:
• Functional class “bus driver voltage regulator control” (CT index: 471))
• Functional class “bus driver bus guardian interface” (CT index: 50)
• Functional class “bus driver logic level adaption” (CT index: 49)
• Functional class “bus driver remote wake-up” (CT index: 85)
According to the FlexRay requirements, the TLE9221SX is tested and qualified according to the FlexRay Electrical
Physical Layer Conformance Test, version 3.0.1 (acronym EPL_CT) by an external test house.
The TLE9221SX supports data transmission rates from 1 Mbit/s up to 10 Mbit/s. Besides the transmit and receive
capability of the bus, the TLE9221SX provides arrangements for low power supply management, supply voltage
monitoring and bus failure detection.
In BD_Sleep mode, the TLE9221SX quiescent current decreases to a typical, total current consumption of
47.5 μA, while the device is still able to wake up by a dedicated wake-up pattern on the FlexRay data bus or by a
local wake-up event on the pin WAKE. The INH output pin allows the control of external circuitry depending on the
selected mode of operation.
Fail-safe features, like bus failure detection or the power supply monitoring, combined with an easy accessible
Status Information Register support the requirements of safety-related applications with extended diagnostic
features.
The TLE9221SX is internally protected against transients on all global pins. Global pins are BP, BM, WAKE and
VBAT. It is possible to use the TLE9221SX without any additional external protection circuitry while the TLE9221SX
meets the ESD and ISO pulse requirements of the car manufactures.
The TLE9221SX is designed on the latest Infineon Smart Power Technology SPT, which combines power devices
with a highly integrated logic process. Based on its digital design concept, the TLE9221SX provides very high
immunity against RF disturbances over a wide frequency range.
Based on the high symmetry of the BP and BM signals, the TLE9221SX provides the lowest level of
electromagnetic emission (EME) within a wide frequency range.
The TLE9221SX is integrated in a RoHS compliant PG-SSOP16-2 package. The TLE9221SX and the Infineon
Smart Power Technology SPT are especially tailored to withstand the harsh conditions of the automotive
environment and qualified according to the AEC-Q100 standard.
1) FlexRay Physical Layer Conformance Test Specification, version 3.0.1, chapter 5.2, static test cases, index number.
Data Sheet
5 Rev. 1.10, 2013-07-15
5 Page 
TLE9221SX
Overview Functional Blocks
5 Overview Functional Blocks
5.1 Transmitter
The Transmitter is the output driver for the FlexRay bus. It is based on a “high” side and “low” side push-pull unit.
The push-pull units are supplied by the power supply uVCC (see Figure 4).
While driving a “Data_1” or “Data_0” signal on to the FlexRay bus, the transceiver is active and enabled. During
an “Idle” signal, the transceiver is turned off.
uVCC
BP
Driver
Overtemp.
Sensor
uVCC
BM
Driver
time-out
Communication
Controller Interface
Figure 4 Block diagram of the Transmitter
The Transmitter is protected by an internal temperature sensor against overheating in terms of a short circuit on
the bus lines BM or BP. The Transmitter is controlled by the Communication Controller Interface (see
Chapter 5.3). The Transmitter is only active in BD_Normal mode.
5.2 Receiver
The Receiver detects communication elements, like “Idle”, “Data_1” and “Data_0”, when it is not in low power
mode. It is connected to the BP and BM I/O pins of the TLE9221SX, together with the Transmitter, the Bus-Failure
Detector, and the Wake-up Detector (see Figure 2). Based on a digital sampling concept, the Receiver is
optimized to withstand the RF immunity requirements of the automotive industry.
The low pass input filter is tailored to support analog bit times down to 60 ns. Data bits below 60 ns may not be
detected as valid communication elements. When the Receiver detects activity on the FlexRay bus behind the
input filter, the differential Receiver distinguishes whether “Data_0” or “Data_1” is signaled by the differential bus
voltage. The bus activity information is provided to the Bus Guardian Interface. The information regarding the
FlexRay data bits is provided to the Communication Controller (see Figure 5).
The thresholds and the timings of the Receiver are available in Figure 44 and Figure 45.
Data Sheet
11 Rev. 1.10, 2013-07-15
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet TLE9221SX.PDF ] | |
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