MC912DG128A Motorola, MC912DG128A Datasheet - Page 300

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

MSCAN Controller
MC68HC912DT128A Rev 2.0
300
CRFLG
$0104
RESET
W
R
WUPIF
Bit 7
0
0 has no effect on the flag setting. Every flag has an associated interrupt
enable flag in the CRIER register. A hard or soft reset will clear the
register.
WUPIF — Wake-up Interrupt Flag
RWRNIF — Receiver Warning Interrupt Flag
TWRNIF — Transmitter Warning Interrupt Flag
1. RWRNIF = (96 < REC) & RERRIF& TERRIF & BOFFIF
2. TWRNIF = (96 < TEC) & RERRIF& TERRIF & BOFFIF
RWRNIF
If the msCAN12 detects bus activity while it is in SLEEP Mode, it
clears the SLPAK bit in the CMCR0 register; the WUPIF bit will then
be set. If not masked, a Wake-Up interrupt is pending while this flag
is set.
This bit will be set when the msCAN12 goes into warning status due
to the Receive Error counter (REC) exceeding 96 and neither one of
the Error interrupt flags or the Bus-Off interrupt flag is set
masked, an Error interrupt is pending while this flag is set.
This bit will be set when the msCAN12 goes into warning status due
to the Transmit Error counter (TEC) exceeding 96 and neither one of
the Error interrupt flags or the Bus-Off interrupt flag is set
masked, an Error interrupt is pending while this flag is set.
6
0
0 = No wake-up activity has been observed while in SLEEP Mode.
1 = msCAN12 has detected activity on the bus and requested
0 = No receiver warning status has been reached.
1 = msCAN12 went into receiver warning status.
0 = No transmitter warning status has been reached.
1 = msCAN12 went into transmitter warning status.
wake-up.
TWRNIF
5
0
MSCAN Controller
RERRIF
4
0
TERRIF
3
0
BOFFIF
2
0
OVRIF
1
0
1
2
. If not
. If not
MOTOROLA
32-mscan12
Bit 0
RXF
0