IFX 1054G Infineon Technologies, IFX 1054G Datasheet - Page 9

• Manufacturer Part Number: IFX 1054G
• Manufacturer: Infineon Technologies

Specifications of IFX 1054G

• Packages: PG-DSO-14
• Transmission Ratemax: 125.0 kbit/s
• Bus Wake-up Capability: Yes
• Additional Features: INH, NERR, NSTB, ENT, WK, RTL, RTH
• Wake-up Inputs: Bus wake-up + wake-up pin
• Standards: ISO11898-3

Table 1
NSTB
0
0
0
1
1
1) Wake - Up interrupts are released when entering Normal operation mode.
2) If Go - to - Sleep command was used before, ENT may turn LOW as
3)
4.1
The IFX1054G detects the bus failures as described in
or CANL single wire mode to maintain data transmission if necessary. Therefore, the device is equipped with one
differential receiver and 4 single ended receivers, two for each bus line. To avoid false triggering by external RF
influences the single wire modes are only activated after a certain delay time. As soon as the bus failure
disappears the transceiver switches back to differential mode after another time delay. Bus failures are indicated
in the Normal operation mode by setting the NERR output low.
The differential receiver threshold is typ. -3.1 V. This ensures correct reception in the Normal operation mode as
well as in the failure cases 1, 2 and 4 with a noise margin as high as possible. For these failures, further failure
management is not necessary. Detection of the failure cases 1, 2, 3a and 4 is only possible when the bus is
dominant. Nevertheless, they are reported on the NERR output until transmission of the next CAN word on the
bus begins.
When one of the bus failures 3, 5, 6, 6a and 7 is detected, the defective bus wire is disabled by switching off the
affected bus termination and the respective output stage. A Wake - Up from Sleep mode via the bus is possible
either via a dominant CANH or CANL line. This ensures that a Wake - Up is possible even if one of the failures 1
to 7 occurs.
Table 2
Failure #
1
2
3
3a
4
5
6
Data Sheet
V
BAT
Power - On flag will be reseted when entering Normal operation mode.
ENT
0
0
1
0
1
Truth Table of the CAN Transceiver
Bus Failure Management
CAN Bus-line Failures
Failure Description
CANL line interrupted
CANH line interrupted
CANL line shorted to
CANL line shorted to
CANH line shorted to GND
CANL line shorted to GND
CANH line shorted to
Mode
V
mode
Sleep mode
Go - to - Sleep
command
Receive - Only
mode
Normal mode
BAT
Stand - By
1)
2)
V
V
V
BAT
CC
BAT
INH
V
floating
becomes
floating
V
V
BAT
BAT
BAT
NERR
active LOW Wake - Up interrupt if
V
active LOW
V
Power - On
flag
active LOW
bus error flag
CC
BAT
Table
9
3)
is present
2, and automatically switches to a dedicated CANH
V
CC
RxD
HIGH = recessive
receive data;
LOW = dominant
receive data
HIGH = recessive
receive data;
LOW = dominant
receive data
drops, without affecting internal functions.
Operation Modes, Wake - Up
RTL
switched to
switched to
switched to
switched to
switched to
Rev. 1.0, 2009-05-12
IFX1054G
V
V
V
V
V
BAT
BAT
BAT
CC
CC