October 2003
rev 1.0
ASM1811
Application Information
Operation - Power Monitor
The
ASM1811
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 V
CC
voltage is detected, the
RESET signal is asserted. On power-up, RESET is kept
voltage has reached the selected tolerance. This allows the
power supply and microprocessor to stabilize before RESET
is released.
RESET
V
CC
V
CCTP
(MAX)
V
CCTP
V
CCTP
(MIN)
t
F
t
RPD
t
R
V
CCTP
(MAX)
V
CCTP
(MIN)
V
CCTP
V
OL
Figure 2: Timing Diagram: Power-Down
V
CC
t
RPU
V
OH
RESET
Figure 1: Timing Diagram: Power-Up
~
~
3 of 8
active (LOW) for approximately 150ms after the power supply
~
~
~
~
Low Power 5V µP Reset
Notice: The information in this document is subject to change without notice
PULSECORE [ PulseCore Semiconductor ]
