mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 349

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

17.13.10 msCAN12 Identifier Acceptance Control Register (CIDAC)
MC68HC912DG128 — Rev 3.0
MOTOROLA
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.
Freescale Semiconductor, Inc.
The CPU sets these flags to define the identifier acceptance filter
organisation (see
summarizes the different settings. In Filter Closed mode no
messages are accepted such that the foreground buffer is never
reloaded.
The msCAN12 sets these flags to indicate an identifier acceptance hit
(see
different settings.
6
0
0
For More Information On This Product,
Identifier Acceptance
IDHIT2
Table 17-8. Identifier Acceptance Mode Settings
Table 17-9. Identifier Acceptance Hit Indication
0
0
0
0
1
1
1
1
IDAM1
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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
Two 32 bit Acceptance Filters
Identifier Acceptance Mode
Eight 8 bit Acceptance Filters
3
0
0
Table 17-7
Programmer’s Model of Control Registers
Identifier Acceptance Hit
Filter Closed
Filter).
IDHIT2
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 17-7
IDHIT1
1
0
MSCAN Controller
Technical Data
IDHIT0
Bit 0
0
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