Texas Instruments MSA025, User Manual

Page: 8 / 16

EVM Setup and Operation
www.ti.com
8 SLVUAY9 – November 2016
Submit Documentation Feedback
Copyright © 2016, Texas Instruments Incorporated
TPS3808G01-Q1EVM (MSA025) Voltage Supervisor User Guide
4.1.1 Manual Reset (MR)
The TPS3808G01-Q1 devices offers a manual reset pin. The EVM offers a pushbutton switch that will pull
the MR pin to GND when pressed, then back to floating when released. There is also a test point
connected directly to the MR pin in case the user wants to connect the MR pin to a manual reset source.
When MR is pulled low, the RESET pin is asserted, forcing it into a low state. After MR returns to a logic
high and SENSE is above its reset threshold, RESET is deasserted high after the user-defined delay
expires. See
Figure 11 through Figure 13 .
Figure 11. TPS3808G01-Q1 RESET Asserted Due to MR
Pulled Low
Figure 12. TPS3808G01-Q1 RESET Deasserted Due to
MR Pulled High, With Delay t
D
, C
T-
Floating
Figure 13. TPS3808G01-Q1 RESET Deasserted Due to MR Pulled High, With Delay t
D
, C
T
Tied to GND Through
100-pF capacitor