at32uc3b0512-z2ues ATMEL Corporation, at32uc3b0512-z2ues Datasheet - Page 623

• Manufacturer Part Number: at32uc3b0512-z2ues
• Description: 32-bit Avr Microcontroller
• Manufacturer: ATMEL Corporation

Table 28-7.
28.4.3
Table 28-8.
32059J–12/2010
Symbol
T
Symbol
V
V
V
V
V
T
T
T
T
BOD
DDRR
DDFR
POR+
POR-
RESTART
POR
RST
SSU1
SSU2
Reset Sequence
BOD Timing
Electrical Characteristics
Parameter
Minimum time with VDDCORE <
VBOD to detect power failure
Parameter
VDDCORE rise rate to ensure power-
on-reset
VDDCORE fall rate to ensure power-
on-reset
Rising threshold voltage: voltage up
to which device is kept under reset by
POR on rising VDDCORE
Falling threshold voltage: voltage
when POR resets device on falling
VDDCORE
On falling VDDCORE, voltage must
go down to this value before supply
can rise again to ensure reset signal
is released at V
Minimum time with VDDCORE <
V
Time for reset signal to be
propagated to system
Time for Cold System Startup: Time
for CPU to fetch its first instruction
(RCosc not calibrated)
Time for Hot System Startup: Time for
CPU to fetch its first instruction
(RCosc calibrated)
POR-
POR+
Conditions
Falling VDDCORE from 1.8V to 1.1V
Conditions
Rising VDDCORE:
V
Falling VDDCORE:
1.8V -> V
Falling VDDCORE:
1.8V -> V
Falling VDDCORE:
1.8V -> 1.1V
RESTART
-> V
POR+
RESTART
POR+
Min.
Min.
0.01
0.01
-0.1
480
1.4
1.2
Typ.
Typ.
1.55
300
200
420
1.3
15
AT32UC3B
Max.
Max.
1.65
800
400
400
960
1.4
0.5
V/ms
V/ms
Unit
Unit
ns
µs
µs
µs
µs
V
V
V
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