33889 datasheet(44/60 Pages) FREESCALE

44 / 60 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33889

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

Fault tolerant CAN transceiver standard modes

The CAN transceiver standard mode can be programmed by setting CEXT to 0. The transceiver cell will then be behave as

known from MC33388.

Table 15. CAN Transceiver Modes

Table 16. CAN transceiver extended modes (CAN with CEXT bit =1 is not recommended)

Fault tolerant CAN transceiver extended modes

By setting CEXT to 1 the transceiver cell supports sub bus communication

Note1: CEXT Bit should be set at 0. The CAN operation in extended mode is not recommended.

Note: if DFIS bit is set to 1, WUR register must be read before going into sleep or stop mode in order to clear the wake-up flag.

During read out L0 must be at high level and should stay high when entering sleep or stop.

CEXT

CCTR1

CCTR0

Mode

TermVBAT

RxOnly

RxTx

CEXT (1)

CCTR1

CCTR0

Mode

TermVBAT

TermVDD

RxOnly

RxTx

FDIS

L0 wake input filter (20

µs typical)

Enable (LO wake threshold selectable by WUR register)

Disable (L0 wake-up threshold is low level only, no matter D0 and D1 bits set in WUR register).

33889 Datasheet(PDF) 44 Page - Freescale Semiconductor, Inc