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ATtiny261-ESSZ Scheda tecnica(PDF) 190 Page - ATMEL Corporation

Il numero della parte ATtiny261-ESSZ
Spiegazioni elettronici  8-bit Microcontroller with 2/4/8K Bytes In-System Programmable Flash
PDF  227 Pages
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Produttore elettronici  ATMEL [ATMEL Corporation]
Homepage  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATtiny261-ESSZ Scheda tecnica(HTML) 190 Page - ATMEL Corporation

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190
7753C–AVR–07/09
ATtiny261/ATtiny461/ATtiny861
23.4.3
External Clock Drive
23.5
System and Reset Characteristics
Notes:
1. Values are guidelines only.
Table 23-2.
External Clock Drive
Symbol
Parameter
VCC = 2.7 - 5.5V
VCC = 4.5 - 5.5V
Units
Min.
Max.
Min.
Max.
1/tCLCL
Clock Frequency
0
8
0
16
MHz
tCLCL
Clock Period
125
62.5
ns
tCHCX
High Time
40
20
ns
tCLCX
Low Time
40
20
ns
tCLCH
Rise Time
1.6
0.5
µs
tCHCL
Fall Time
1.6
0.5
µs
Δt
CLCL
Change in period from one clock cycle to the next
2
2
%
Table 23-3.
Reset, Brown-out and Internal Voltage Characteristics
(1)
Symbol
Parameter
Condition
Min
Typ
Max
Units
tRST
Minimum pulse width on
RESET Pin
VCC = 3V
2.5
µs
VHYST
Brown-out Detector Hysteresis
50
mV
tBOD
Min Pulse Width on Brown-out
Reset
2µs
VBG
Bandgap reference voltage
VCC = 3.0V,
T
A =25°C
1.0
1.1
1.2
V
tBG
Bandgap reference start-up
time
V
CC = 2.7V,
TA =25°C
40
70
µs
IBG
Bandgap reference current
consumption
V
CC = 2.7V,
TA =25°C
15
µA
Table 23-4.
BODLEVEL Fuse Coding(1)
BODLEVEL [2..0] Fuses
Min V
BOT
Typ V
BOT
Max V
BOT
Units
111
BOD Disabled
110
1.68
1.8
1.92
V
101
2.5
2.7
2.9
100
4.0
4.3
4.6
011
Reserved
010
001
000
Note:
1. 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 VCC = VBOT during the production test. This guar-
antees that a Brown-out Reset will occur before V
CC drops to a voltage where correct
operation of the microcontroller is no longer guaranteed.



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