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AS8515 数据表(PDF) 13 Page - ams AG

部件名 AS8515
功能描述  Data Acquisition System with Power Management and LIN Transceiver for 12V Battery Sensor Applications
PDF  65 Pages
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制造商  AMSCO [ams AG]
网页  http://www.ams.com
标志 AMSCO - ams AG

AS8515 数据表(HTML) 13 Page - ams AG

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AS8515
Datasheet - AS8515 To p Die Overview
7.8 Window Watchdog (WWD)
The Window Watchdog ensures that the Microcontroller is properly functioning in the normal mode of the device. The Watchdog is started after a
reset and the Microcontroller needs to send a trigger in the window of WD_TSV (service time). If the trigger occurs early, in the period WD_TCL,
or after WD_TSV, a reset output is generated.
The Microcontroller can access the trigger bit for the watchdog through SPI. The WWD can be enabled and the window times can be
programmed through factory setting and enabled as a factory option.
Figure 5. Window Watchdog Functionality
7.9 Timeout Watchdog (TWD)
The Timeout Watchdog ensures that the Microcontroller is in proper functional state in the device standby mode. The Watchdog timer will be
started upon a rising edge on INT and will generate a reset output if the Microcontroller doesn’t send a trigger before the timeout.
The Microcontroller can access the trigger bit for the watchdog through SPI. The TWD can be enabled by factory setting and the timeout interval
can be programmed through SPI.
Period
Non-Service time (WD_TCL)
Service time (WD_TSV)
Trigger
restart
period
Trigger
via SPI
Last trigger
Earliest point for
correct trigger
(No RESET)
50 %
100 %
Wrong trigger
(RESET generation)
Correct trigger
(No RESET)
Latest point for
correct trigger
(No RESET)
Wrong trigger
(RESET generation)



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