![](http://datasheet.mmic.net.cn/100000/IF180C52TXXX-20R_datasheet_3493957/IF180C52TXXX-20R_792.png)
792
32099I–01/2012
AT32UC3L016/32/64
32.9
Timing Characteristics
32.9.1
Startup, Reset, and Wake-up Timing
The startup, reset, and wake-up timings are calculated using the following formula:
Where
and
is the period of the CPU clock. If
another clock source than RCSYS is selected as CPU clock the startup time of the oscillator,
, must added to the wake-up time in the stop, deepstop, and static sleep modes.
more details about oscillator startup times.
Note:
1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
32.9.2
RESET_N Timing
Note:
1. These values are based on simulation and characterization of other AVR microcontrollers manufactured in the same pro-
cess technology. These values are not covered by test limits in production.
ttCONST NCPU tCPU
×
+
=
tCONST
NCPU
tCPU
tOSCSTART
Table 32-36. Maximum Reset and Wake-up Timing
(1) Parameter
Measuring
Max
(in s)
Max
Startup time from power-up, using
regulator
Time from VDDIN crossing the VPOT+ threshold of
POR33 to the first instruction entering the decode
stage of CPU. VDDCORE is supplied by the internal
regulator.
2210
0
Startup time from power-up, no
regulator
Time from VDDIN crossing the VPOT+ threshold of
POR33 to the first instruction entering the decode
stage of CPU. VDDCORE is connected to VDDIN.
1810
0
Startup time from reset release
Time from releasing a reset source (except POR18,
POR33, and SM33) to the first instruction entering
the decode stage of CPU.
170
0
Wake-up
Idle
From wake-up event to the first instruction of an
interrupt routine entering the decode stage of the
CPU.
019
Frozen
0110
Standby
0110
Stop
27 +
116
Deepstop
27 +
116
Static
97 +
116
Wake-up from shutdown
From wake-up event to the first instruction entering
the decode stage of the CPU.
1180
0
tCONST
NCPU
tOSCSTART
Table 32-37. RESET_N Waveform Paramete
rs Symbol
Parameter
Conditions
Min
Max
Units
tRESET
RESET_N minimum pulse length
10
ns