mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 319

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

15.2.2
TXCAN is the MSCAN transmitter output pin. The TXCAN output pin represents the logic level on the
CAN bus:
15.2.3
A typical CAN system with MSCAN is shown in
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 nodes.
15.3
This section describes in detail all the registers and register bits in the MSCAN module. Each description
includes a standard register diagram with an associated figure number. Details of register bit and field
function follow the register diagrams, in bit order. All bits of all registers in this module are completely
synchronous to internal clocks during a register read.
15.3.1
The CANCTL0 register provides various control bits of the MSCAN module as described below.
Freescale Semiconductor
Register Definition
0 = Dominant state
1 = Recessive state
TXCAN — CAN Transmitter Output Pin
CAN System
MSCAN Control Register 0 (CANCTL0)
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
TXCAN
CAN_H
CAN node 1
CAN Controller
Transceiver
(MSCAN)
MCU
CAN_L
Figure 15-2. CAN System
RXCAN
CAN Bus
Figure
15-2. Each CAN node is connected physically to
CAN node 2
Freescale’s Controller Area Network (MSCANV1)
CAN node n
15-3