ATMEGA8U2-AUR Atmel, ATMEGA8U2-AUR Datasheet - Page 267

• Manufacturer Part Number: ATMEGA8U2-AUR
• Description: MCU AVR 8K FLASH 16MHZ 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8U2-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -

26.4.3
26.5
Table 26-3.
Note:
7799D–AVR–11/10
Symbol
V
V
V
V
t
t
V
CCRR
t
I
RST
BOD
HYST
POR
POT
BG
BG
BG
System and Reset Characteristics
The POR will not work unless the supply voltage has been below VPOT (falling)
External Clock Drive
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
V
V
Minimum pulse width on RESET Pin
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
Reset, Brown-out and Internal Voltage Reference Characteristics
CC
CC
Start Voltage to ensure internal Power-on Reset signal
Rise Rate to ensure internal Power_on Reset signal
Table 26-2.
Note:
Symbol
1/t
Δ
t
t
t
t
t
CHCX
CLCH
CHCL
CLCL
CLCX
t
CLCL
CLCL
All DC Characteristics contained in this datasheet are based on simulation and characterization of
other AVR microcontrollers manufactured in the same process technology. These values are pre-
liminary values representing design targets, and will be updated after characterization of actual
silicon.
Parameter
External Clock Drive
Parameter
Oscillator Frequency
Clock Period
High Time
Low Time
Rise Time
Fall Time
Change in period from
one clock cycle to the
next
(Note:)
Min.
125
50
50
0
V
CC
V
Condition
CC
5V, 25°C
=2.7-5.5V
5.5V
= 2.7V -
ATmega8U2/16U2/32U2
-
-
Max.
1.6
1.6
8
2
Min
-0.1
1.0
0.3
Min.
62.5
25
25
0
V
CC
Typ
400
=4.5-5.5V
1.4
1.3
1.1
50
40
10
Max.
0.5
0.5
16
2
Max
2.3
2.3
0.1
1.2
70
Units
Units
MHz
V/ms
mV
µA
ns
ns
ns
μs
μs
%
ns
ns
µs
V
V
V
V
267