AT32UC3A0512_14 Datasheet, PDF (43/98 Pages) ATMEL Corporation – High Performance, Low Power 32-Bit Atmel AVR Microcontroller

AT32UC3A
Table 12-7. BOD Timing
12.4.2 POR
Symbol
T_BOD
Parameter
Minimum time with
VDDCORE < VBOD to
detect power failure
Test Conditions
Typ.
Falling VDDCORE
from 1.8V to 1.1V
300
Max.
800
Units.
ns
Table 12-8. Electrical Characteristic
Symbol Parameter
Test Conditions
Min. Typ. Max. Units.
V_DDRR
VDDCORE rise rate to ensure power-on-reset
0.01
V/ms
V_SSFR
VDDCORE fall rate to ensure power-on-reset
0.01
400 V/ms
V_POR+
Rising threshold voltage: voltage up to which
device is kept under reset by POR on rising
VDDCORE
Rising VDDCORE:
V_RESTART -> V_POR+
1.35
1.5
1.6
V
V_POR-
Falling threshold voltage: voltage when POR
resets device on falling VDDCORE
Falling VDDCORE:
1.8V -> V_POR+
1.25
1.3
1.4
V
V_RESTART
On falling VDDCORE, voltage must go down to
this value before supply can rise again to ensure
reset signal is released at V_POR+
Falling VDDCORE:
1.8V -> V_RESTART
-0.1
0.5
V
T_POR
Minimum time with VDDCORE < V_POR-
Falling VDDCORE:
1.8V -> 1.1V
15
us
T_RST
Time for reset signal to be propagated to system
200 400 us
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