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FS2302M Scheda tecnica(PDF) 82 Page - NXP Semiconductors

Il numero della parte FS2302M
Spiegazioni elettronici  Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers
PDF  230 Pages
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Produttore elettronici  NXP [NXP Semiconductors]
Homepage  http://www.nxp.com
Logo NXP - NXP Semiconductors

FS2302M Scheda tecnica(HTML) 82 Page - NXP Semiconductors

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NXP Semiconductors
FS23
Safety system basis chip (SBC) with power management, CAN FD and LIN transceivers
WDW_RECOV[3:0]
Watchdog window duration when the
device is in fault recovery strategy
0000
DISABLE (Infinite window, fully open)
0001
1.0 ms
0010
2.0 ms
0011
3.0 ms
0100
4.0 ms
0101
6.0 ms
0110
8.0 ms
0111
12 ms
1000
16 ms
1001
24 ms
1010
32 ms
1011(default)
64 ms
1100
128 ms
1101
256 ms
1110
512 ms
1111
1024 ms
Reset condition
POR
Table 40. Watchdog window in fault recovery configuration
The transition from WDW_PERIOD to WDW_RECOVERY happens when the FCCU pin indicates an
error and FS0B or LIMP0 is asserted. If the MCU sends a good watchdog refresh before the end of the
WDW_RECOVERY duration, the device switches back to the WDW_PERIOD duration and associated duty
cycle if the FCCU pins do not indicate an error anymore. Otherwise, a new WDW_RECOVERY period is
started. If the MCU does not send a good watchdog refresh before the end of the WDW_RECOVERY duration,
then a reset pulse is generated and the device goes to Fail-safe state.
aaa-051468
FCCU
Normal phase
Error phase
WDW_RECOVERY
WDW_PERIOD
WDW_PERIOD
WDW_RECOVERY
WDW_RECOVERY
Initialization
FCCU error
FLT_ERR_CNT +1
FCCU error
FLT_ERR_CNT +1
Bad WD or
window timeout
Good WD
Good WD
Normal phase
Error phase
FS0B
WD_WINDOW
RSTB
Figure 47. Fault recovery strategy principle
FS23
All information provided in this document is subject to legal disclaimers.
© 2024 NXP B.V. All rights reserved.
Product data sheet
Rev. 7.0 — 16 October 2024
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