MPC555CME Freescale Semiconductor, MPC555CME Datasheet - Page 583

• 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

16.1 Features
MPC555 / MPC556
USER’S MANUAL
The MPC555 / MPC556 contains two CAN 2.0B controller modules (TouCAN). Each
TouCAN is a communication controller that implements the controller area network
(CAN) protocol, an asynchronous communications protocol used in automotive and in-
dustrial control systems. It is a high speed (1 Mbit/sec), short distance, priority based
protocol that can run over a variety of mediums (for example, fiber optic cable or an
unshielded twisted pair of wires). The TouCAN supports both the standard and extend-
ed identifier (ID) message formats specified in the CAN protocol specification, revision
2.0, part B.
Each TouCAN module contains 16 message buffers, which are used for transmit and
receive functions. It also contains message filters, which are used to qualify the re-
ceived message IDs when comparing them to the receive buffer identifiers.
Figure 16-1
Each TouCAN module provides these features:
• Full implementation of CAN protocol specification, version 2.0 A/B
1. In the MPC555 / MPC556, the CNTX1 and CNRX1 signals are not available.
— Standard data and remote frames (up to 109 bits long)
shows a block diagram of a TouCAN module.
CAN 2.0B CONTROLLER MODULE
Figure 16-1 TouCAN Block Diagram
CAN 2.0B CONTROLLER MODULE
Message
16Rx/Tx
Buffers
Rev. 15 October 2000
Interface Unit
SECTION 16
Slave Bus
Control
IMB
Transmitter
Receiver
CNTX0
CNTX1
CNRX0
CNRX1
1
1
MOTOROLA
16-1