MC68HC908AS60ACFN FREESCALE [Freescale Semiconductor, Inc], MC68HC908AS60ACFN Datasheet - Page 296

• Manufacturer Part Number: MC68HC908AS60ACFN
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

MSCAN Controller (MSCAN08)
23.13.9 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.
296
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 23-9
Address:
The CIDAC register can be written only if the SFTRES bit in the CMCR0 is
set.
Filter).
Reset:
Read:
Write:
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
Figure 23-23. Identifier Acceptance Control Register (CIDAC)
summarizes the different settings.
Table 23-9
IDAM1
IDHIT1
$0508
Bit 7
0
0
0
0
1
1
0
0
1
1
Table 23-9. Identifier Acceptance Mode Settings
Table 23-10. Identifier Acceptance Hit Indication
= Unimplemented
summarizes the different settings. In “filter closed” mode no messages
6
0
0
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
23.5 Identifier Acceptance
1
0
Freescale Semiconductor
IDHIT0
Bit 0
23.5 Identifier
0