mc9s12q128 Freescale Semiconductor, Inc, mc9s12q128 Datasheet - Page 307

• Manufacturer Part Number: mc9s12q128
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

10.3.2.12 MSCAN Identifier Acceptance Control Register (CANIDAC)
The CANIDAC register is used for identifier acceptance control as described below.
Read: Anytime
Write: Anytime in initialization mode (INITRQ = 1 and INITAK = 1), except bits IDHITx, which are read-
only
Freescale Semiconductor
Module Base + 0x000B
IDHIT[2:0]
IDAM[1:0]
Field
5:4
2:0
Reset:
W
R
Identifier Acceptance Mode — The CPU sets these flags to define the identifier acceptance filter organization
(see
mode, no message is accepted such that the foreground buffer is never reloaded.
Identifier Acceptance Hit Indicator — The MSCAN sets these flags to indicate an identifier acceptance hit (see
Section 10.4.3, “Identifier Acceptance
IDHIT2
IDAM1
Section 10.4.3, “Identifier Acceptance
0
0
Figure 10-15. MSCAN Identifier Acceptance Control Register (CANIDAC)
7
0
0
1
1
0
0
0
0
1
1
1
1
= Unimplemented
Table 10-16. CANIDAC Register Field Descriptions
Table 10-17. Identifier Acceptance Mode Settings
6
0
0
Table 10-18. Identifier Acceptance Hit Indication
IDHIT1
IDAM0
0
1
0
1
0
0
1
1
0
0
1
1
IDAM1
0
5
Filter”).
IDHIT0
MC9S12Q128
Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV2)
Filter”).
Rev 1.09
0
1
0
1
0
1
0
1
IDAM0
Table 10-18
4
0
Description
Table 10-17
Identifier Acceptance Mode
Four 16-bit acceptance filters
Two 32-bit acceptance filters
Eight 8-bit acceptance filters
summarizes the different settings.
Filter closed
0
0
3
Identifier Acceptance Hit
summarizes the different settings. In filter closed
Filter 0 hit
Filter 1 hit
Filter 2 hit
Filter 3 hit
Filter 4 hit
Filter 5 hit
Filter 6 hit
Filter 7 hit
IDHIT2
2
0
IDHIT1
0
1
IDHIT0
0
0
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