MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 410

• Manufacturer Part Number: MC68HC908AZ32ACFU
• Description: Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

MSCAN Controller (MSCAN08)
24.9.4 CPU Wait Mode
24.9.5 Programmable Wakeup Function
24.10 Timer Link
Advance Information
410
synchronisation is achieved the MSCAN08 will not respond to incoming
data.
The MSCAN08 module remains active during CPU wait mode. The
MSCAN08 will stay synchronized to the CAN bus and generates
transmit, receive, and error interrupts to the CPU, if enabled. Any such
interrupt will bring the MCU out of wait mode.
The MSCAN08 can be programmed to apply a low-pass filter function to
the RxCAN input line while in internal sleep mode (see information on
control bit WUPM in
426). This feature can be used to protect the MSCAN08 from wake-up
due to short glitches on the CAN bus lines. Such glitches can result from
electromagnetic inference within noisy environments.
The MSCAN08 will generate a timer signal whenever a valid frame has
been received. Because the CAN specification defines a frame to be
valid if no errors occurred before the EOF field has been transmitted
successfully, the timer signal will be generated right after the EOF. A
pulse of one bit time is generated. As the MSCAN08 receiver engine also
receives the frames being sent by itself, a timer signal also will be
generated after a successful transmission.
The previously described timer signal can be routed into the on-chip
timer interface module (TIM).This signal is connected to the timer n
channel m input
bit in the CMCR0.
1. The timer channel being used for the timer link is integration dependent.
Freescale Semiconductor, Inc.
For More Information On This Product,
MSCAN Controller (MSCAN08)
Go to: www.freescale.com
(1)
under the control of the timer link enable (TLNKEN)
MSCAN08 Module Control Register 1
68HC908AZ32A — Rev 0.0
MOTOROLA
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