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Since
VIP (Vehicular Interface Port) Inputs are active-low, the
external low-battery-alert device must ground the selected
VIP Input to activate the alert, and idle high to deactivate
the alert. The
external low-battery-alert device monitors the vehicle's battery
voltage and when the voltage goes below a set threshold, the
device asserts a DEK VIP Input (or
a Radio
VIP Input)
set to "Low
Battery Alert". As long as the VIP Input remains
asserted (low battery condition) and does not
return to the idle state (good battery) before a 15 second
internal timer expires, the radio's display then shows a temporary
"low battery" alert and periodically sounds the
Low Battery Standby Chirp
until the VIP Input returns to the idle state when the battery
voltage achieves normal levels. See
also Low Battery Tx Chirp. |
