Datasheet

Controller Area Network (CAN) Timing

56F803 Technical Data, Rev. 16

Freescale Semiconductor 45

Figure 3-27 Bus Wakeup Detection

1. If Wakeup glitch filter is enabled during the design initialization and also CAN is put into SLEEP mode then, any bus event

(on MSCAN_RX pin) whose duration is less than 5 micro seconds is filtered away. However, a valid CAN bus wakeup detec-

tion takes place for a wakeup pulse equal to or greater than 5 microseconds. The value of 5 microseconds originates from the

fact that the CAN wakeup message consists of 5 dominant bits at the highest possible baud rate of 1Mbps.

2. Parameters listed are guaranteed by design.

MSCAN_RX

CAN receive

data pin

(Input)

WAKEUP