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MFS5600AMBAFES 数据表(PDF) 49 Page - NXP Semiconductors

部件名 MFS5600AMBAFES
功能描述  Automotive buck regulator and controller with voltage monitors and watchdog timer
PDF  118 Pages
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制造商  NXP [NXP Semiconductors]
网页  http://www.nxp.com
标志 NXP - NXP Semiconductors

MFS5600AMBAFES 数据表(HTML) 49 Page - NXP Semiconductors

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NXP Semiconductors
FS5600
Automotive buck regulator and controller with voltage monitors and watchdog timer
aaa-031018
WD_ERR_LIMIT = 11
WD_ERR_LIMIT = 10
WD_ERR_LIMIT = 01
0
0
1
2
3
4
WD refresh
NOT OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
0
1
2
3
4
5
6
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh OK
2
1
WD OFF
WD refresh OK
WD OFF
WD refresh OK
WD OFF
WD_ERR_LIMIT = 00
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
0
1
2
3
4
5
6
WD refresh OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh OK
7
8
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh
NOT OK
WD refresh OK
WD OFF
WD refresh
NOT OK
WD refresh
NOT OK
Figure 14. Watchdog error counter configurations
17.3.4 Watchdog refresh counter
The watchdog refresh strategy is available for the challenger and simple watchdog schemes. Each time the
watchdog is properly refreshed, the watchdog refresh counter is incremented by ’1’. Each time the watchdog
refresh counter reaches its maximum value (‘6’ by default) and if next WD refresh is also good, the fault error
counter (FLT_ERR_CNT) is decremented by ’1’. Whatever the position the watchdog refresh counter is in, each
time there is a wrong refresh watchdog, the watchdog refresh counter is reset to ’0’.
To allow flexibility in the application, the maximum value of this watchdog refresh counter is configurable with
the WD_RFR_LIMIT[1:0] register.
WD_RFR_LIMIT[1:0]
Watchdog refresh counter value
00 (reset)
6
01
4
10
2
11
1
Table 42. Watchdog refresh counter configuration
The watchdog refresh counter value can be read by the MCU for diagnostics with the WD_RFR_CNT[2:0] bits.
FS5600
All information provided in this document is subject to legal disclaimers.
© 2024 NXP B.V. All rights reserved.
Product data sheet
Rev. 4 — 29 April 2024
49 / 118



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