TLE9221SX Datasheet, PDF (23/91 Pages) Infineon Technologies AG – FlexRay Transceiver

TLE9221SX
Host Interface and Status Information Register
STBN
EN
uV_BAT
BD_Sleep (because of uV_BAT undervoltage)
100% uV_IO
50% uV_IO
0% uV_IO
t
100% uV_IO
50% uV_IO
0% uV_IO
t
uBDUVV_BAT
t
ERRN
host command = BD_Standby
ERRN = wake-up flag
host command = BD_Normal
ERRN = error bit
dReTime_ERRN
Figure 13 Status at the ERRN while uV_BAT undervoltage
dReTime_ERRN
100% uV_IO
50% uV_IO
0% uV_IO
t
6.3.1 Reset the ERRN Output Pin
The ERRN output depends directly on the status bits in the SIR. Resetting the bits in the SIR automatically also
clears the ERRN output and, vice versa, one bit in SIR sets the ERRN output.
As described in Chapter 6.2.3 the SIR can be reset by a dedicated host command or by the readout of the SIR.
Since the SIR and consequently also the ERRN output can only be reset by a dedicated host command, toggling
at the ERRN pin is not possible.
According to the FlexRay Conformance Test Specification, version 3.0.1, a specification of parameter dERRN_Stable
is not required, if the ERRN output can only be reset by a host command (CT index: 70¹⁾).
1) FlexRay Physical Layer Conformance Test Specification, version 3.0.1, chapter 5.2, static test cases, index number.
Data Sheet
23
Rev. 1.10, 2013-07-15