User Manual

Airborne DP550 Family Databook B&B Electronics, Inc.
29
9.0 RESET Function
For correct operation of the on-board Power-on RESET (POR) and internal RESET
controllers, the RESET pin on the WLNN-XX-DP550 family must obey the following
timing and signal conditions.
Figure 4 - Power on RESET Timing
Figure 5 - RESET Timing
Table 18 - RESET Timing
Symbol Parameter
Min Typ Max Units
t
PURST
Valid V
DD
to RESET valid 200 ms
t
RLRV
RESET Valid to RESET Low 0 ms
t
RPWI
Valid V
DD
to Internal RESET completed 200 ms
t
RPW
RESET Pulse Width 100 µs