s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 292

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MSCAN Controller (MSCAN08)
24.13.9 MSCAN08 Identifier Acceptance Control Register
IDAM1–IDAM0— Identifier Acceptance Mode
IDHIT1–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.
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The CPU sets these flags to define the identifier acceptance filter organization (see
Acceptance
will be accepted so that the foreground buffer will never be reloaded.
The MSCAN08 sets these flags to indicate an identifier acceptance hit (see
Filter).
Table 24-9
Address:
The CIDAC register can be written only if the SFTRES bit in the CMCR0 is
set.
Filter).
Reset:
Read:
Write:
Figure 24-23. Identifier Acceptance Control Register (CIDAC)
summarizes the different settings.
Table 24-9
IDAM1
IDHIT1
$0508
Bit 7
0
0
0
0
1
1
0
0
1
1
Table 24-9. Identifier Acceptance Mode Settings
Table 24-10. Identifier Acceptance Hit Indication
= Unimplemented
summarizes the different settings. In “filter closed” mode no messages
6
0
0
MC68HC908AZ32A Data Sheet, Rev. 2
IDAM0
IDHIT0
0
1
0
1
0
1
0
1
IDAM1
5
0
NOTE
IDAM0
4
0
Single 32-Bit Acceptance Filter
Identifier Acceptance Mode
Four 8-Bit Acceptance Filters
Two 16-Bit Acceptance Filter
Identifier Acceptance Hit
3
0
0
Filter Closed
Filter 0 Hit
Filter 1 Hit
Filter 2 Hit
Filter 3 Hit
2
0
0
IDHIT1
24.5 Identifier Acceptance
1
0
Freescale Semiconductor
IDHIT0
Bit 0
24.5 Identifier
0