MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 588

• Manufacturer Part Number: MPC555CME
• Description: KIT EVALUATION FOR MPC555
• Manufacturer: Freescale Semiconductor
• Type: Microcontrollerr

Specifications of MPC555CME

• Contents: Module Board, Installation Guide, Power Supply, Cable, Software and more
• Processor To Be Evaluated: MPC555
• Data Bus Width: 32 bit
• Interface Type: RS-232
• For Use With/related Products: MPC555
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

16.3.1.2 Fields for Extended Format Frames
16.3.1.3 Fields for Standard Format Frames
16.3.1.4 Serial Message Buffers
MPC555
USER’S MANUAL
Remote Request
ID[28:18]/[17:15]
Request (RTR)
Transmission
RTR/SRR Bit
ID Extended
Table 16-4
mat frames.
Table 16-5
frames.
To allow double buffering of messages, the TouCAN has two shadow buffers called
serial message buffers. The TouCAN uses these two buffers for buffering both re-
ceived messages and messages to be transmitted. Only one serial message buffer is
active at a time, and its function depends upon the operation of the TouCAN at that
time. At no time does the user have access to or visibility of these two buffers.
16-bit Time
Substitute
Treatment
ID[28:18]
ID[14:0]
Remote
(SRR)
Stamp
Field
(IDE)
Field
RTR
/
MPC556
describes the message buffer fields used only for standard identifier format
describes the message buffer fields used only for extended identifier for-
Contains the 14 most significant bits of the extended identifier, located in the ID HIGH word of the
message buffer.
Contains a fixed recessive bit, used only in extended format. Should be set to one by the user for
Tx buffers. It will be stored as received on the CAN bus for Rx buffers.
If extended format frame is used, this field should be set to one. If zero, standard format frame
should be used.
Bits [14:0] of the extended identifier, located in the ID LOW word of the message buffer.
This bit is located in the least significant bit of the ID LOW word of the message buffer;
0 = Data Frame, 1 = Remote Frame.
The ID LOW word, which is not needed for standard format, is used in a standard format buffer
to store the 16-bit value of the free-running timer which is captured at the beginning of the iden-
tifier field of the frame on the CAN bus.
Contains bits [28:18] of the identifier, located in the ID HIGH word of the message buffer. The four
least significant bits in this register (corresponding to the IDE bit and ID[17:15] for an extended
identifier message) must all be written as logic zeros to ensure proper operation of the TouCAN.
This bit is located in the ID HIGH word of the message buffer;
0 = data frame, 1 = remote frame.
If the TouCAN transmits this bit as a one and receives it as a zero, an “arbitration loss” is
indicated. If the TouCAN transmits this bit as a zero and is receives it as a one, a bit error is indi-
cated.
If the TouCAN transmits a value and receives a matching response, a successful bit transmission
is indicated.
Table 16-4 Extended Format Frames
Table 16-5 Standard Format Frames
CAN 2.0B CONTROLLER MODULE
Rev. 15 October 2000
Description
Description
MOTOROLA
16-6