TLE6251G Datasheet, PDF (14/31 Pages) Infineon Technologies AG – High Speed CAN-Transceiver with Wake Detection

TLE 6251 G
• Indicator: NERR = LOW in RxOnly mode
• Remarks: Power-up flag is cleared when entering the normal mode
Wake-Up Flag
• Task: to signalize a wake-up condition at the WK pin (filtering time t > t_WK) or via CAN bus
message (filtering time t > t_WU)
• Indicator: RxD or NERR = LOW in sleep/stand-by mode immediately after wake-up
• Remarks: Flag is cleared on entering the RxOnly mode
Wake-Up Source Flag
• Task: to distinguish between the two wake-up sources
• Indicator: NERR = LOW in normal mode = wake-up via WK pin
• Remarks: only available if the power-up flag is cleared. After four recessive to dominant
edges on TxD in normal mode, the flag is cleared. Leaving the normal mode clears the wake-
up source flag.
Bus Failure Flag
• Task: to signalize a bus line short circuit condition to GND, V_S or V_CC
• Indicator: NERR = LOW in normal mode
• Remarks: flag is set after four consecutive recessive to dominant cycles on pin TxD when
trying to drive the bus dominant. The bus failure flag is cleared if the normal mode is
reentered or 4 recessive to dominant edges at TxD without failure condition.
Local Failure Flag
• Task: to signalize one of the five local failure conditions described in Local Failure-Flags
and -Detection
• Indicator: NERR = LOW in RxOnly mode (local failure flag is set)
• Remarks: the flag is cleared when entering the normal mode from RxOnly mode or when RxD
is dominant while TxD is recessive.
Final Data Sheet
14
Rev. 3.2, 2006-04-05