MC68F375BGMZP33 Freescale Semiconductor, MC68F375BGMZP33 Datasheet - Page 317

• Manufacturer Part Number: MC68F375BGMZP33
• Description: IC MPU 32BIT 33MHZ 217-PBGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68F375BGMZP33

• Processor Type: M683xx 32-Bit
• Speed: 33MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 217-PBGA
• Processor Series: M683xx
• Core: CPU32
• Data Bus Width: 32 bit
• Program Memory Type: Flash
• Program Memory Size: 256 KB
• Data Ram Size: 10 KB
• Interface Type: SPI, SCI, CAN
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 16
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 16 Channel
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: No

7.4.5 Time Stamp
7.5 TouCAN Operation
7.5.1 TouCAN Reset
7.5.2 TouCAN Initialization
MC68F375
REFERENCE MANUAL
The value of the free-running 16-bit timer is sampled at the beginning of the identifier
field on the CAN bus. For a message being received, the time stamp is stored in the
time stamp entry of the receive message buffer at the time the message is written into
that buffer. For a message being transmitted, the time stamp entry is written into the
transmit message buffer once the transmission has completed successfully.
The free-running timer can optionally be reset upon the reception of a frame into mes-
sage buffer 0. This feature allows network time synchronization to be performed.
The basic operation of the TouCAN can be divided into three areas:
Example sequences for performing each of these processes is given in the following
paragraphs.
The TouCAN can be reset in two ways:
Following the negation of reset, the TouCAN is not synchronized with the CAN bus,
and the HALT, FRZ, and FRZACK bits in the module configuration register are set. In
this state, the TouCAN does not initiate frame transmissions or receive any frames
from the CAN bus. The contents of the message buffers are not changed following
reset.
Any configuration change or initialization requires that the TouCAN be frozen by either
the assertion of the HALT bit in the module configuration register or by reset.
Initialization of the TouCAN includes the initial configuration of the message buffers
and configuration of the CAN communication parameters following a reset, as well as
any reconfiguration which may be required during operation. The following is a general
initialization sequence for the TouCAN:
• Reset and initialization of the module
• Transmit message handling
• Receive message handling
• Hard reset, using one of the IMB3 reset lines.
• Soft reset, using the SOFTRST bit in the module configuration register.
1. Initialize all operation modes
a. Initialize the transmit and receive pin modes in control register 0
b. Initialize the bit timing parameters PROPSEG, PSEGS1, PSEG2, and
c. Select the S-clock rate by programming the PRESDIV register.
d. Select the internal arbitration mode (LBUF bit in CANCTRL1).
(CANCTRL0).
RJW in control registers 1 and 2 (CANCTRL[1:2]).
Freescale Semiconductor, Inc.
For More Information On This Product,
CAN 2.0B CONTROLLER MODULE
Go to: www.freescale.com
Rev. 25 June 03
MOTOROLA
7-11