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ATmega169P Datasheet(PDF) 331 Page - ATMEL Corporation

Part # ATmega169P
Description  8-bit Microcontroller with 16K Bytes In-System Programmable Flash
PDF  393 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

ATmega169P Datasheet(HTML) 331 Page - ATMEL Corporation

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331
8018N–AVR–08/09
ATmega169P
28.4.3
External Clock Drive
28.5
System and Reset Characteristics
Note:
1. The Power-on Reset will not work unless the supply voltage has been below VPOT (falling)
Table 28-3.
External Clock Drive
Symbol
Parameter
VCC=1.8-5.5V
VCC=2.7-5.5V
VCC=4.5-5.5V
Units
Min.
Max.
Min.
Max.
Min.
Max.
1/tCLCL
Oscillator
Frequency
01
08
0
16
MHz
tCLCL
Clock Period
1000
125
62.5
ns
tCHCX
High Time
400
50
25
ns
tCLCX
Low Time
400
50
25
ns
tCLCH
Rise Time
2.0
1.6
0.5
μs
tCHCL
Fall Time
2.0
1.6
0.5
μs
Δt
CLCL
Change in period
from one clock
cycle to the next
22
2
%
Table 28-4.
Reset, Brown-out,and Internal Voltage Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Units
VPOT
Power-on Reset Threshold
Voltage (rising)
T
A = -40°C
to 85°C
0.7
1.0
1.4
V
Power-on Reset Threshold
Voltage (falling)(1)
TA = -40°C
to 85°C
0.05
0.9
1.3
V
V
PSR
Power-on Reset Slope Rate
0.1
4.5
V/ms
VRST
RESET Pin Threshold Voltage
VCC = 3V
0.2 VCC
0.9 VCC
V
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 = 2.7V,
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,
T
A =25°C
15
µA



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