TC1796
Peripheral Units (Vol. 2 of 2)
Controller Area Network (MultiCAN) Controller
User’s Manual 22-87 V2.0, 2007-07
MultiCAN, V2.0
The Node Frame Counter Register NFCRx contains the actual value of the frame
counter as well as control and status bits of the frame counter.
0 [31:26] r Reserved
Read as 0; should be written with 0.
NFCRx (x = 0-3)
Node x Frame Counter Register (218
H
+x*100
H
) Reset Value: 0000 0000
H
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16
0
CFC
OV
CFC
IE
0 CFMOD CFSEL
rrwhrwrrwrw
1514131211109876543210
CFC
rwh
Field Bits Type Description
CFC [15:0] rwh CAN Frame Counter
In Frame Count Mode (CFMOD = 00
B
), this bit field contains
the frame count value.
In Time Stamp Mode (CFMOD = 01
B
), this bit field contains
the captured bit time count value, captured with the start of a
new frame.
In all Bit Timing Analysis Modes (CFMOD = 10
B
), CFC
always displays the number of f
CLC
clock cycles
(measurement result) minus 1. Example: a CFC value of 34
in measurement mode CFSEL = 000
B
means that 35 f
CLC
clock cycles have been elapsed between the most recent two
dominant edges on the receive input.
Field Bits Type Description
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