mc9s12hz256v2 Freescale Semiconductor, Inc, mc9s12hz256v2 Datasheet - Page 335

• Manufacturer Part Number: mc9s12hz256v2
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

12.2.2
TXCAN is the MSCAN transmitter output pin. The TXCAN output pin represents the logic level on the
CAN bus:
12.2.3
A typical CAN system with MSCAN is shown in
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.
12.3
This section provides a detailed description of all registers accessible in the MSCAN.
12.3.1
Table 12-1
register address results from the addition of base address and address offset. The base address is
determined at the MCU level and can be found in the
is defined at the module level.
The MSCAN occupies 64 bytes in the memory space. The base address of the MSCAN module is
determined at the MCU level when the MCU is defined. The register decode map is fixed and begins at the
first address of the module address offset.
Table 12-1
base address. The detailed register descriptions follow in the order they appear in the register map.
Freescale Semiconductor
Memory Map and Register Definition
0 = Dominant state
1 = Recessive state
gives an overview on all registers and their individual bits in the MSCAN memory map. The
shows the individual registers associated with the MSCAN and their relative offset from the
TXCAN — CAN Transmitter Output Pin
CAN System
Module Memory Map
TXCAN
CAN_H
CAN node 1
CAN Controller
Transceiver
(MSCAN)
MCU
MC9S12HZ256 Data Sheet, Rev. 2.05
CAN_L
RXCAN
Figure 12-2. CAN System
CAN Bus
Figure
Chapter 12 Freescale’s Scalable Controller Area Network (MSCANV2)
Memory
CAN node 2
12-2. Each CAN station is connected physically
block description chapter. The address offset
CAN node n
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