November 2006
rev 1.6
ASM1816
tF
VCC
Application Information
Operation - Power Monitor
The ASM1816 detects out-of-tolerance power supply
conditions. It resets a processor during power-up, power-
down and issues a reset to the system processor when the
monitored power supply voltage is below the reset threshold.
When an out-of-tolerance VCC voltage is detected, the
VCCTP (MAX)
VCCTP
VCCTP (MIN)
t
RESET
RPD
RESET signal is asserted. On power-up, RESET is kept
active (LOW) for approximatley 150ms after the power supply
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stablize before RESET
is released.
V
OL
tR
Figure 2: Timing Diagram: Power-Down
VCCTP (MAX)
VCCTP
VCCTP (MIN)
t
RPU
VCC
V
OH
RESET
Figure 1: Timing Diagram: Power-Up
3 of 9
Low Power 3.3V/3.0V µP Reset
Notice: The information in this document is subject to change without notice
PULSECORE [ PulseCore Semiconductor ]
