mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 325
mcf51ac256a
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mcf51ac256a
Description
Mcf51ac Flexis
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MCF51AC256A.pdf
(566 pages)
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The bit time is determined by the oscillator frequency, the baud rate prescaler, and the number of time
quanta (Tq) clock cycles per bit (as shown in
15.3.4.1
A flag can be cleared only by software (writing a 1 to the corresponding bit position) when the condition
which caused the setting is no longer valid. Every flag has an associated interrupt enable bit in the
CANRIER register.
Freescale Semiconductor
Reset:
W
R
Bit
1
MSCAN Receiver Flag Register (CANRFLG)
Þ
WUPIF
This setting is not valid. Please refer to
TSEG13
Time
1
0
7
This setting is not valid. Please refer to
0
0
0
0
1
1
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
:
TSEG22
=
0
0
1
1
:
(
--------------------------------------------------------- -
Figure 15-7. MSCAN Receiver Flag Register (CANRFLG)
= Unimplemented
Prescaler
CSCIF
6
0
TSEG12
f CANCLK
0
0
0
0
1
1
:
TSEG21
Table 15-7. Time Segment 2 Values
Table 15-8. Time Segment 1 Values
RSTAT1
0
0
1
1
Þ
:
value
0
5
TSEG11
0
0
1
1
1
1
:
Table 15-7
)
•
Table 15-35
TSEG20
RSTAT0
(
1
Table 15-35
4
0
0
1
0
1
+
:
TimeSegment1
TSEG10
and
0
1
0
1
0
1
:
for valid settings.
TSTAT1
Table
for valid settings.
0
3
Freescale’s Controller Area Network (MSCANV1)
Time Segment 2
1 Tq clock cycle
2 Tq clock cycles
7 Tq clock cycles
8 Tq clock cycles
15-8).
15 Tq clock cycles
16 Tq clock cycles
2 Tq clock cycles
3 Tq clock cycles
Time segment 1
4 Tq clock cycles
1 Tq clock cycle
+
TSTAT0
:
TimeSegment2
2
0
:
1
1
OVRIF
1
1
0
1
)
Eqn. 15-1
RXF
0
0
15-9
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