DRV3203E-Q1 Datasheet, PDF (6/39 Pages) Texas Instruments – Three-Phase Brushless Motor Driver

DRV3203E-Q1
SLVSCE5A – NOVEMBER 2013 – REVISED JANUARY 2014
DETAILED DESCRIPTION
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WATCHDOG
Description:
A watchdog monitors the PRN signal and VCC supply level and generates a reset to the MCU through the RES
pin if the status of PRN is not normal or VCC is lower than the specified threshold level. Detection of a special
pattern on the PRN input during power up can disable the watchdog.
VDD
VCC
VDD Under Voltage
Detection
VCC Under Voltage
Detection
OSC1
Clock
Monitor
Reset
Logic
VCC
3k
RES
VCC
Watch Dog Timer
WDT
WDT
Enable
Digital Pattern
Detection
100k
PRN
Figure 2. Watchdog Block Diagram
To MCU
Max 100pF
From MCU
6
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