MAC7200 datasheet(589/976 Pages) FREESCALE

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The Generic FlexCAN2 Module

MAC7200 Microcontroller Family Reference Manual, Rev. 2

Freescale Semiconductor

511

The FlexCAN module stores CAN messages for transmission and reception using a Message Buffer

structure. Each individual MB is formed by 16 bytes mapped on memory as described in Table 28-5.

Table 28-5 shows a Standard/Extended Message Buffer (MB0) memory map, using 16 bytes total

($80–$8F space).

28.2.6.2

Message Buffer Structure

The Message Buffer structure used by the FlexCAN module is represented in Figure 28-2. Both Extended

and Standard Frames (29-bit Identifier and 11-bit Identifier, respectively) used in the CAN specification

(Version 2.0 Part B) are represented.

Base + $0024

Interrupt Masks 2 (IMASK2)

S/U

Yes

Base + $0028

Interrupt Masks 1 (IMASK1)

S/U

Yes

Base + $002C

Interrupt Flags 2 (IFLAG2)

S/U

Yes

Base + $0030

Interrupt Flags 1 (IFLAG1)

S/U

Yes

Base + $0034–$005F

Reserved

Base + $0060–$007F

Reserved

Base + $0080–$017F

Message Buffers MB0–MB15

S/U

Base + $0180–$027F

Message Buffers MB16–MB31

S/U

Base + $0280–$047F

Reserved

Base + $0480-087F

Reserved

Base + $0880-$08BF

Rx Individual Mask Registers RXIMR0-RXIMR15

S/U

Base + $08C0-$08FF

Rx Individual Mask Registers RXIMR16-RXIMR31

S/U

Base + $0900-$097F

Reserved

Table 28-5. Message Buffer MB0 Memory Mapping

Address Offset

MB Field

$80

Control and Status (C/S)

$84

Identifier Field

$88–$8F

Data Field 0 – Data Field 7 (1 byte each)

Table 28-4. Module Memory Map (Continued)

Address

Use

Access

Type

Affected

by Hard

Reset

Affected

by Soft

Reset

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