MPC5553/MPC5554 Microcontroller Reference Manual, Rev. 5
16-10 Freescale Semiconductor
The BAM ignores the following errors:
•Bit1 errors
•Bit0 errors
• Acknowledge errors
• Cyclic redundancy code errors
•Form errors
• Stuffing errors
• TX error counter errors
• Rx error counter errors
All data received is assumed to be good and is echoed out on the CNTX_A signal.
NOTE
It is the responsibility of the host computer to compare the ‘echoes’ with the
sent data and restart the process if an error is detected.
See Figure 16-5 for details of CAN bit timing.
Figure 16-5. CAN Bit Timing
The eSCI is configured for 1 start bit, 8 data bits, no parity and 1 stop bit and to operate at a baud rate equal
to the system clock divided by 1250. See Table 16-8 for examples of baud rates.
The BAM ignores the following eSCI errors:
• Overrun errors
• Noise errors
• Framing errors
• Parity errors
All data received is assumed to be good and is echoed out on the TXD signal. It is the responsibility of the
host computer to compare the echoes with the sent data and restart the process if an error is detected.
SYNC_SEG Time Segment 1 Time Segment 2
Sample Point
NRZ Signal
Transmit Point
1
time quanta time quanta time quanta
9 2
1 Bit Time
1 time Quanta = 5 system clock periods = 3 1/3 crystal clock periods (with PLL enabled)
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