MC3S12RG128 Datasheet, PDF (345/546 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 12 Freescale’s Scalable Controller Area Network (MSCANV2)
• Global initialization of configuration registers
12.1.4 Modes of Operation
The following modes of operation are specific to the MSCAN. See Section 12.4, “Functional Description,”
for details.
• Listen-Only Mode
• MSCAN Sleep Mode
• MSCAN Initialization Mode
• MSCAN Power Down Mode
12.2 External Signal Description
The MSCAN uses two external pins:
12.2.1 RXCAN — CAN Receiver Input Pin
RXCAN is the MSCAN receiver input pin.
12.2.2 TXCAN — CAN Transmitter Output Pin
TXCAN is the MSCAN transmitter output pin. The TXCAN output pin represents the logic level on the
CAN bus:
0 = Dominant state
1 = Recessive state
12.2.3 CAN System
A typical CAN system with MSCAN is shown in Figure 12-2. Each CAN station is connected physically
to the CAN bus lines through a transceiver device. The transceiver is capable of driving the large current
needed for the CAN bus and has current protection against defective CAN or defective stations.
MC3S12RG128 Data Sheet, Rev. 1.05
Freescale Semiconductor
345