TLE8262-2E Datasheet, PDF (81/94 Pages) Infineon Technologies AG – Universal System Basis Chip

TLE8262-2E
Serial Peripheral Interface
15.5.3.2 Limp Home failure encoder
Table 22 describes the encoding of all possible reason to activate automatically the Limp Home output. Bits are
set back to “000” when switching Limp Home off via SPI.
Table 22 Limp Home Failure Diagnosis
LH2 LH1
LH0
Failure¹⁾
0
0
0
No failure
0
0
1
0
1
0
V_cc1µC undervoltage Time-out
One Watchdog failure (config 1 and 2)
0
1
1
Two consecutive Watchdog failures (config 3 and 4)
1
0
0
INIT Mode Time-out
1
0
1
1
1
0
Temperature shutdown at V_cc1µC
Reset clamped
1
1
1
Reserved
15.5.3.3 Test pin and failure to Limp Home configuration read out
The SBC allows to read the hardware setting of the configuration that is done via the INT pin, as well as the test
pin and the WD to LH bit. Table 23 describes the encoding of these informations.
Table 23 Test pin and SBC Configuration
Test2 Test1 Test0 Test Read Out¹⁾
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
V_cc1µC remains ON in SBC Restart Mode after one Watchdog failure (config 1)
V_cc1µC is OFF in SBC Fail-Safe Mode after one Watchdog failure (config 2)
V_cc1µC remains ON in SBC Restart Mode after two Watchdog failures (config 3)
V_cc1µC is OFF in SBC Fail-Safe Mode after two Watchdog failures (config 4)
Software Development Mode. In case of watchdog failure V_cc1µC remains ON, no
reset is generated and Restart Mode or Fail-Safe Mode are not entered.
1
0
1
Software Development Mode. In case of watchdog failure V_cc1µC remains ON, no
reset is generated and Restart Mode or Fail-Safe Mode are not entered.
1
1
0
Software Development Mode. In case of watchdog failure V_cc1µC remains ON, no
reset is generated and Restart Mode or Fail-Safe Mode are not entered.
1
1
1
Software Development Mode. In case of watchdog failure V_cc1µC remains ON, no
reset is generated and Restart Mode or Fail-Safe Mode are not entered.
1) Refer also to Chapter 4.2.1
Data Sheet
81
Rev. 1.0, 2009-05-26