Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Manual De Usuario

Freescale Semiconductor

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The IDHITx indicators are always related to the message in the foreground buffer (RxFG). When a
message gets shifted into the foreground buffer of the receiver FIFO the indicators are updated as well.

This register is reserved for factory testing of the MSCAN module and is not available in normal system
operating modes.

5-4

IDAM[1:0]

Identifier Acceptance Mode — The CPU sets these flags to define the identifier acceptance filter organization
(see

summarizes the different settings. In filter closed

mode, no message is accepted such that the foreground buffer is never reloaded.

2-0

IDHIT[2:0]

Identifier Acceptance Hit Indicator — The MSCAN sets these flags to indicate an identifier acceptance hit (see

 summarizes the different settings.

0

0

Two 32-bit acceptance filters

0

1

Four 16-bit acceptance filters

1

0

Eight 8-bit acceptance filters

1

1

Filter closed

0

0

0

Filter 0 hit

0

0

1

Filter 1 hit

0

1

0

Filter 2 hit

0

1

1

Filter 3 hit

1

0

0

Filter 4 hit

1

0

1

Filter 5 hit

1

1

0

Filter 6 hit

1

1

1

Filter 7 hit