TC1796
Peripheral Units (Vol. 2 of 2)
Controller Area Network (MultiCAN) Controller
User’s Manual 22-173 V2.0, 2007-07
MultiCAN, V2.0
TTCFGR
Time Trigger Configuration Register (2C4
H
) Reset Value: 0000 0000
H
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
TTCNT RTO
rh rh
1514131211109876543210
EXPTT 0 IRO
rw r rw
Field Bits Type Description
IRO [6:0] rw Initial Reference Offset
This bit field determines the initial reference trigger
offset. The value is considered as 2’s complement
and can reach values between 0 and 127.
EXPTT [15:8] rw Expected Transmit Triggers
This bit field determines how many transmit requests
are expected in a matrix cycle.
RTO [23:16] rh Reference Trigger Offset
This bit field indicates the actual reference trigger
offset. This value is considered as 2’s complement
and can reach values between -127 and 127. It is
added to the time mark (given by the basic cycle end
entry in the scheduler memory) for the trigger of the
reference message.
The modification and the corresponding conditions
are listed in Table 22-15.
TTCNT [31:24] rh Transmit Trigger Counter
The transmit trigger counter is incremented by 1
each time a transmit trigger is requested for a
TTCAN node. When reaching the value of EXPTT, it
is no longer incremented and further transmit
requests are not serviced (messages are not
transferred).
It is reset at the beginning of each new matrix cycle
(after correct transfer on the reference message of
basic cycle 0).
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