mc68hc08az60 Freescale Semiconductor, Inc, mc68hc08az60 Datasheet - Page 339

• Manufacturer Part Number: mc68hc08az60
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

35-mscan
MOTOROLA
NOTE:
LOOPB — Loop Back Self-Test Mode
WUPM — Wakeup Mode
CLKSRC — Clock Source
The CMCR1 register can be written only if the SFTRES bit in the
MSCAN08 module control register is set
Freescale Semiconductor, Inc.
When this bit is set, the MSCAN08 performs an internal loop back
which can be used for self-test operation: the bit stream output of the
transmitter is fed back to the receiver internally. The RxCAN input pin
is ignored and the TxCAN output goes to the recessive state (logic
‘1’). The MSCAN08 behaves as it does normally when transmitting
and treats its own transmitted message as a message received from
a remote node. In this state the MSCAN08 ignores the bit sent during
the ACK slot of the CAN frame Acknowledge field to insure proper
reception of its own message. Both transmit and receive interrupt are
generated.
This flag defines whether the integrated low-pass filter is applied to
protect the MSCAN08 from spurious wakeups (see
Wakeup Function
This flag defines which clock source the MSCAN08 module is driven
from (see
For More Information On This Product,
1 = Activate loop back self-test mode
0 = Normal operation
1 = MSCAN08 will wake up the CPU only in cases of a dominant
0 = MSCAN08 will wake up the CPU after any recessive to
1 = The MSCAN08 clock source is CGMOUT (see
0 = The MSCAN08 clock source is CGMXCLK/2 (see
pulse on the bus which has a length of at least t
dominant edge on the CAN bus.
MSCAN Controller (MSCAN08)
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Clock System
on page 324).
on page 325).
Programmer’s Model of Control Registers
MSCAN Controller (MSCAN08)
MC68HC08AZ60 — Rev 1.0
Programmable
Figure
wup
Figure
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7).
7).
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