2: Functional Description
PremierWave® 2050 Through-Hole Adapter Integration Guide
21
Reset Pins
The PremierWave 2050 has two signals for use as reset signals. Signal EXT_RESET# is a
hardware controlled input signal that will reboot the PremierWave 2050 processor when
asserted low. Signal DEFAULT# is polled by the PremierWave 2050 software. When
DEFAULT# is asserted low for seven seconds, the unit will reset the system to the default
manufacturing settings and reboot the unit. PremierWave 2050 has an additional signal that
can be used to wake up the unit processor when the unit is in a sleep or power down state.
The SHDN signal is active when the module is in the shutdown state. Use the SHDN signal to
gate off external logic when the module is in the shutdown state to minimize power
Table 2-10 PremierWave 2050 Reset Signals
Signal
Pin
Description
Reset
State
EXT_RESET#
1
Unit hardware reset, active low. Drive low for 50ms to reboot unit.
Signal should be driven high or left floating after reset.
Input
DEFAULT#
3
Unit reset to default, active low.
Drive low for 6 seconds or longer to reset unit to default settings.
Input
WAKE
4
CPU wake up input. Module wakes from low power state on a rising
edge. Refer to user guide for WAKE pin configuration options.
Input
SHDN
26
Indicates when module is in Standby state. Use to power off
external devices. See evaluation board schematic for
recommended connections.
Figure 2-9 Recommended Use of SHDN Signal to Shut Off External Power Rail
