Datasheet

Chapter 12 Freescale’s Controller Area Network (S08MSCANV1)
MC9S08DZ128 Series Data Sheet, Rev. 1
Freescale Semiconductor 299
If the WUPE bit in CANCLT0 is not asserted, the MSCAN will mask any activity it detects on CAN. The
RXCAN pin is therefore held internally in a recessive state. This locks the MSCAN in sleep mode
(Figure 12-45). WUPE must be set before entering sleep mode to take effect.