BLUEPIRAT MINI | USER MANUAL /
page 33 of 62
11
Interfaces
The different interfaces of the BLUEPIRAT Mini supported bus systems are described in this
chapter in more detail.
11.1
CAN
The BLUEPIRAT Mini is able to record data in compliance with the CAN specification 2.0a (11
Bit identifier) and 2.0b (29 Bit identifier).
11.1.1
CAN data with 29 Bit identifiers
The BLUEPIRAT
Mini can also log CAN data with 29 Bit identifiers. You don’t have to configure
anything. All the CAN data will be logged as they are available on the CAN bus. It is also possi-
ble to log CAN messages mixed with
CAN specification 2.0a (11 Bit)
and
CAN specification
2.0b (29 Bit)
identifiers.
11.1.2
Operating modes High Speed / Low Speed / CAN FD
Depending on the model, the BLUEPIRAT Mini has different numbers of High Speed (HS), Low
Speed (LS) CAN or CAN FD interfaces. It is not possible to change a CAN interface. Each type
is using different transceivers.
The electrical behavior of the Low Speed and the High Speed CAN is different, hence, the Low
Speed CAN port of the BLUEPIRAT Mini must not be connected to a High Speed CAN bus and
vice versa.
Both operating modes use differential signals (CANH, CANL). For the correct data recording, all
nodes of the bus must have a common reference potential. The BLUEPIRAT Mini uses the con-
nection “
clamp 31
” as a reference potential. The lines of the High Speed CANs are terminated
with a high resistance.
Low Speed CAN
High Speed CAN
CAN FD
Transceiver chip
Philips
NXP 1055
Philips
NXP TJA1041
NXP
TJA1044GT
Terminating resistor
4k64
10k
4k64
Baud rate
– data channel
50 kbit/s - 125 kbit/s
50 kbit/s - 1 Mbit/s
50kbit/s
– 5Mbit/s
Baud rate
– control channel
-
-
50kbit/s
– 1Mbit/s
Supported identifiers (SW)
11 and 29 Bit
11 and 29 Bit
11 and 29 Bit
Disabling acknowledge
possible
possible
possible
Time stamps
at the end of the
telegram
at the end of the
telegram
at the end of the
telegram
Table 11.1: CAN
