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MPF7100BVBA2ES 데이터시트(PDF) 90 Page - NXP Semiconductors

부품명 MPF7100BVBA2ES
상세설명  7-channel power management integrated circuit for high performance applications
PDF  125 Pages
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제조업체  NXP [NXP Semiconductors]
홈페이지  http://www.nxp.com
Logo NXP - NXP Semiconductors

MPF7100BVBA2ES 데이터시트(HTML) 90 Page - NXP Semiconductors

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NXP Semiconductors
PF7100
7-channel power management integrated circuit for high performance applications
PF7100
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 4 — 9 March 2021
90 / 125
OTP_WD_MAX_EXPIRE causes the watchdog event to be initiated, as soon as the WD
timer expires for the first time.
The OTP_WDWINDOW bit selects whether the watchdog is single ended or window
mode.
• When OTP_WDWINDOW = 0, the WD_CLEAR flag can be cleared within 100 % of the
watchdog timer.
• When OTP_WDWINDOW = 1, the WD_CLEAR flag can only be cleared within the
second half of the programmed watchdog timer. Clearing the WD_CLEAR flag within
the first half of the watchdog window is interpreted as a failure to refresh the watchdog.
aaa-028072
WD refresh OK
WD_EXPIRE_CNT
WD refresh NOK
WD refresh
NOK
WD refresh
NOK
WD refresh
NOK
WD refresh
NOK
WD refresh NOK
WD refresh
NOK
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh
NOK
WD EVENT
WD refresh OK
WD refresh OK
WD refresh OK
WD refresh OK
n =
WD_MAX
_EXPIRE
5
4
3
2
1
0
0
WD_TIMER
Expired
WD refresh NOK
0
WD_TIMER
Expired
WD_TIMER
50 % Window
WD_TIMER
100 % Window
Figure 36. Watchdog timer operation
The watchdog function can be enabled or disabled by writing the WD_EN bit on the I2C
register map. When the I2C_SECURE_EN = 1, a secure write must be performed to
change the WD_EN bit.
• When WD_EN = 0, the internal watchdog timer operation is disabled.
• When WD_EN = 1, the internal watchdog timer operation is enabled.
The OTP_WD_EN bit is used to select the default status of the watchdog counter upon
power up.
The watchdog function can be programmed to be enabled or disabled during the
standby state by writing the WD_STBY_EN bit on the I2C register map. When the
I2C_SECURE_EN = 1, a secure write must be performed to modify the WD_STBY_EN
bit.



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