AT90PWM216-16SE ATMEL [ATMEL Corporation], AT90PWM216-16SE Datasheet - Page 45
AT90PWM216-16SE
Manufacturer Part Number
AT90PWM216-16SE
Description
8-bit Microcontroller with 16K Bytes In-System Programmable flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT90PWM216-16SE.pdf
(360 pages)
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9.0.3
7710D–AVR–08/09
Power-on Reset
Figure 9-1.
Table 9-1.
Notes:
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
POR circuit can be used to trigger the start-up Reset, as well as to detect a failure in supply
voltage.
A Power-on Reset (POR) circuit ensures that the device is reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
Symbol
V
V
t
RST
POT
RST
CC
1. Values are guidelines only..
2. The Power-on Reset will not work unless the supply voltage has been below V
BODLEVEL [2..0]
decreases below the detection level.
Parameter
Power-on Reset Threshold
Voltage (rising)
Power-on Reset Threshold
Voltage (falling)
Minimum pulse width on RESET
Pin
RESET Pin Threshold Voltage
Table
Reset Logic
Reset Characteristics
9-1. The POR is activated whenever V
Pull-up Resistor
(2)
Spike
Filter
CC
rise. The RESET signal is activated again, without any delay,
(1)
CKSEL[3:0]
Power-on Reset
Reset Circuit
SUT[1:0]
Brown-out
Watchdog
Oscillator
Generator
Circuit
Clock
Condition
CK
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
CC
AT90PWM216/316
0.2Vcc
is below the detection level. The
Min.
Typ.
400
1.4
1.3
TIMEOUT
0.85Vcc
POT
Max.
2.3
2.3
(falling)
Units
ns
V
V
V
45
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