Preface
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
21-35
21.5.2
FlexCAN2 Addressing and RAM Size
There are 1024 bytes of RAM for a maximum of 64 message buffers. The user can program the maximum
number of message buffers (MBs) using the MAXMB field in the CAN
x
_MCR. For this 1024-byte RAM
configuration, MAXMB can be any number from 0
–
63.
21.6
Document Revision History
Table 21-19. Changes Between MPC5565RM Revisions 0.1 and 1
In the Receive Process, Section 21.4.3, “Receive Process,” in the third step, changed
“receive active and empty” to EMPTY.
Reworded the first paragraph of Matching Process, Section 21.4.3.1, “Matching Process:”
• From: “After a MB is marked as ‘RX active and empty,’ it will participate in the internal matching process, which takes place
every time the receiver receives an error free frame. In this process, all active RX buffers compare their ID value to the
newly received one, and if a match occurs, the frame is transferred (move in) to the first (that is, lowest entry) matching MB.”
• To: “The matching process compares the IDs of all active RX message buffers to newly received frames, so that, if a match
occurs, a newly received frame is transferred (moved in) to the first (that is, lowest entry) matching MB. Only MBs marked
as EMPTY, FULL, or OVERRUN will participate in the internal matching process at the CRC frame field. The internal
matching process takes place every time the receiver receives an error free frame.”
• In Bus Interface, Section 21.4.8, “Bus Interface,” the following NOTE has been added:
“Unused MB space must not be used as general purpose RAM while FlexCAN is transmitting and receiving CAN
frames.”
Table 21-4
Message Buffer Field Descriptions
: Changed description of the ID field to match register diagram. Changed (28 to
11) to (3 to 13) for the MSB bits and added (14 to 31) for the LSB bits:
Standard frame format, only the 11 most significant bits (3 to 13) are used for frame identification in both receive and
transmit cases. The 18 least significant bits (14 to 31) are ignored.
Extended frame format, all bits are used for frame identification in both receive and transmit cases.
Section 21.3.3.2, “Control Register (CANx_CR): Deleted the following sentence
• Most of the fields in this register should only be changed while the module is disabled or in freeze mode.
• Table 21-8: CANx_CR Field Descriptions: Deleted from field description for CLK_SRC: To guarantee reliable operation, this
bit should only be changed while the module is disabled.
Summary of Contents for MPC5565
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Page 553: ...Flash Memory MPC5565 Microcontroller Reference Manual Rev 1 0 13 38 Freescale Semiconductor...
Page 559: ...SRAM MPC5565 Microcontroller Reference Manual Rev 1 0 14 6 Freescale Semiconductor...
Page 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
Page 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...