ATMEGA8A-AUR Atmel, ATMEGA8A-AUR Datasheet - Page 38
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ATMEGA8A-AUR
Manufacturer Part Number
ATMEGA8A-AUR
Description
MCU AVR 8KB FLASH 16MHZ 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8A-MU.pdf
(308 pages)
Specifications of ATMEGA8A-AUR
Core Processor
AVR
Core Size
8-Bit
Speed
16MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Part Number
Manufacturer
Quantity
Price
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10.2.1
8159D–AVR–02/11
Power-on Reset
Figure 10-1. Reset Logic
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
level. The 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
Figure 10-2. MCU Start-up, RESET Tied to V
INTERNAL
TIME-OUT
CC
RESET
RESET
V
decreases below the detection level.
BODLEVEL
CC
Table 25-3 on page
BODEN
Pull-up Resistor
FILTER
SPIKE
V
V
POT
RST
CKSEL[3:0]
CC
247. The POR is activated whenever V
t
Reset Circuit
SUT[1:0]
TOUT
Brown-Out
Watchdog
Oscillator
Generator
rise. The RESET signal is activated again, without any delay,
Clock
CK
MCU Control and Status
CC
Register (MCUCSR)
DATA BUS
Delay Counters
TIMEOUT
CC
is below the detection
ATmega8A
38
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