K2L OptoLyzer MOCCA compact FD, Руководство пользователя

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OptoLyzer MOCCA Devices
DS60001526B 14 © 2017 - 2018 K2L GmbH & Co. KG
K2L USER MANUAL
4.3 Properties of Supported Bus Systems
The OptoLyzer MOCCA device is intended to be used as stimulation, test and analysis device for
automotive field buses with DUTs connected to them. Therefore the design is constrained to ensure
the behavior to be as passive as possible.
4.3.1 CAN
The accuracy of CAN time stamps is 500 µs (or better).
4.3.1.1 High-Speed Transceiver
High-Speed CAN bus systems according to ISO 11898-2:2015 [ 2 ] are terminated with 120 Ω at each
end. Therefore the OptoLyzer MOCCA device does not terminate the bus. Transmission speed ranges
from 33.333 kbits/s to 1 Mbits/s.
4.3.2 CAN FD
CAN FD bus systems according to ISO 11898-2, ISO 11898-2:2016 [ 2 ] and SAE J2962-2 are
terminated with 120 Ω at each end. The OptoLyzer MOCCA compact FD device can be used at the
end of the bus system (in this case plug in the optional termination resistor, Section 1.2, "Scope of
Delivery," on page 6 ) or somewhere between the ends (in this case don’t plug in the optional
termination resistor). The accuracy of CAN FD time stamps is 1 µs. The OptoLyzer MOCCA compact
FD device supports up to 2 Mbits/s for each CAN FD channel in parallel. It is designed to operate with
up to 64 byte payload. CAN FD requires a prescaler (data phase) of 1 or 2 for 500 kbit/s and above
in case a custom bit rate (named StartCanFdExt in ABI Framework or ConfigureExtended in the K2L
Bus Framework) is used.
4.3.3 FlexRay
The termination of a FlexRay bus depends on the bus topology. Two terminations are mandatory in
each active branch. The OptoLyzer MOCCA device can be installed in various topologies. Therefore
a termination is not implemented in the device. Thus the terminations have to be realized in a different
way. In addition, the OptoLyzer MOCCA device does not act as a bus guardian.
The OptoLyzer MOCCA device provides one FlexRay interface and is able to switch from sleep mode
to wake-up mode stimulated by the FlexRay bus. The OptoLyzer MOCCA device is capable of
transmitting up to 10 Mbit/s as per "Electrical Physical Layer Specification Version 2.0" [
1 ]. The
accuracy of FlexRay time stamps is 500 µs (or better) for the static part of the schedule.
4.3.4 LIN
Both LIN master and LIN slave functionality are supported. The accuracy of LIN time stamps is 1 µs.
The OptoLyzer MOCCA device supports a maximum transmission speed of 20 kbit/s.
4.3.5 MOST
The OptoLyzer MOCCA compact FD designed for a MOST150 network (cPHY) has a fixed clock mode
of 48 kHz. OptoLyzer MOCCA compact FD devices have an INIC, a SpyNIC for MOST and a
StressNIC for MOST on-board. If desired, the StressNIC for MOST can be added to the ring via
software. The accuracy of INIC MOST network time stamps is 500 µs (or better) for the node and 1 µs
for the spy.