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ATmega16-16PU Arkusz danych(PDF) 38 Page - ATMEL Corporation

Numer części ATmega16-16PU
Szczegółowy opis  8-bit Microcontroller with 16K Bytes In-Syustem Programmable Flash
Download  357 Pages
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Producent  ATMEL [ATMEL Corporation]
Strona internetowa  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega16-16PU Arkusz danych(HTML) 38 Page - ATMEL Corporation

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38
2466S–AVR–05/09
ATmega16(L)
Figure 15. Reset Logic
Notes:
1. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling).
2. V
BOT may be below nominal minimum operating voltage for some devices. For devices where
this is the case, the device is tested down to V
CC = VBOT during the production test. This guar-
antees that a Brown-out Reset will occur before VCC drops to a voltage where correct
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 1 for ATmega16L and BODLEVEL = 0 for ATmega16. BODLEVEL = 1 is not
applicable for ATmega16.
Table 15. Reset Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Units
VPOT
Power-on Reset
Threshold Voltage (rising)
1.4
2.3
V
Power-on Reset
Threshold Voltage
(falling)(1)
1.3
2.3
V
VRST
RESET Pin Threshold
Voltage
0.1 V
CC
0.9V
CC
V
tRST
Minimum pulse width on
RESET Pin
1.5
µs
VBOT
Brown-out Reset
Threshold Voltage(2)
BODLEVEL = 1
2.5
2.7
3.2
V
BODLEVEL = 0
3.6
4.0
4.5
tBOD
Minimum low voltage
period for Brown-out
Detection
BODLEVEL = 1
2
µs
BODLEVEL = 0
2
µs
V
HYST
Brown-out Detector
hysteresis
50
mV
MCU Control and Status
Register (MCUCSR)
BODEN
BODLEVEL
Delay Counters
CKSEL[3:0]
CK
TIMEOUT
DATA BUS
Clock
Generator
SPIKE
FILTER
Pull-up Resistor
JTAG Reset
Register
Watchdog
Oscillator
SUT[1:0]
Watchdog
Timer
Reset Circuit
Brown-out
Reset Circuit
Power-on
Reset Circuit


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