MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 362

• Manufacturer Part Number: MC68HC12
• Description: The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
• Manufacturer: MOTOROLA [Motorola, Inc]

MSCAN Controller
18.13.10 msCAN12 Identifier Acceptance Control Register (CIDAC)
Technical Data
362
CIDAC
$0108
RESET
W
R
NOTE:
Bit 7
0
0
IDAM1 – IDAM0 — Identifier Acceptance Mode
IDHIT2 – IDHIT0 — Identifier Acceptance Hit Indicator
The IDHIT indicators are always related to the message in the
foreground buffer. When a message gets copied from the background to
the foreground buffer the indicators are updated as well.
The CIDAC register can only be written if the SFTRES bit in CMCR0 is
set.
The CPU sets these flags to define the identifier acceptance filter
organization (see
summarizes the different settings. In Filter Closed mode no
messages will be accepted such that the foreground buffer will never
be reloaded.
The msCAN12 sets these flags to indicate an identifier acceptance hit
(see
different settings.
6
0
0
Identifier Acceptance
IDHIT2
Table 18-8. Identifier Acceptance Mode Settings
Table 18-9. Identifier Acceptance Hit Indication
0
0
0
0
1
1
1
1
IDAM1
IDAM1
5
0
0
0
1
1
MSCAN Controller
IDHIT1
Identifier Acceptance
0
0
1
1
0
0
1
1
IDAM0
IDAM0
4
0
0
1
0
1
IDHIT0
Filter).
0
1
0
1
0
1
0
1
Four 16 bit Acceptance Filters
Identifier Acceptance Mode
Two 32 bit Acceptance Filters
Eight 8 bit Acceptance Filters
3
0
0
Table 18-7
Identifier Acceptance Hit
Filter Closed
Filter).
IDHIT2
MC68HC912DT128A — Rev 4.0
2
0
Filter 0 Hit
Filter 1 Hit
Filter 2 Hit
Filter 3 Hit
Filter 4 Hit
Filter 5 Hit
Filter 6 Hit
Filter 7 Hit
summarizes the
Table 18-7
IDHIT1
1
0
MOTOROLA
IDHIT0
Bit 0
0