ATMEGA8A-MUR Atmel, ATMEGA8A-MUR Datasheet - Page 247

• Manufacturer Part Number: ATMEGA8A-MUR
• Description: MCU AVR 8KB FLASH 16MHZ 32QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA8A-MUR

• 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

25.5
8159D–AVR–02/11
System and Reset Characteristics
Table 25-2.
Notes:
Table 25-3.
Notes:
Symbol
V
V
V
V
t
t
V
BOD
t
I
RST
HYST
POT
RST
BOT
BG
BG
BG
1. R should be in the range 3 kΩ - 100 kΩ, and C should be at least 20 pF. The C values given in
2. The frequency will vary with package type and board layout.
1. The Power-on Reset will not work unless the supply voltage has been below V
2. V
the table includes pin capacitance. This will vary with package type.
this is the case, the device is tested down to V
antees that a Brown-out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 1 and BODLEVEL = 0 for ATmega8A.
Parameter
Power-on Reset Threshold Voltage
(rising)
Power-on Reset Threshold Voltage
(falling)
RESET Pin Threshold Voltage
Minimum pulse width on RESET Pin
Brown-out Reset Threshold Voltage
Minimum low voltage period for Brown-
out Detection
Brown-out Detector hysteresis
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
BOT
R [kΩ]
External RC Oscillator, Typical Frequencies
Reset, Brown-out and Internal Voltage Reference Characteristics
may be below nominal minimum operating voltage for some devices. For devices where
33
10
(1)
(1)
(2)
C [pF]
22
22
BODLEVEL = 1
BODLEVEL = 0
BODLEVEL = 1
BODLEVEL = 0
CC
Condition
= V
CC
drops to a voltage where correct
BOT
during the production test. This guar-
2.40
3.70
1.15
Min
0.2
ATmega8A
2.60
4.00
1.23
Typ
130
1.4
1.3
40
10
2
2
650kHz
2.0MHz
f
POT
(2)
2.90
4.50
1.35
Max
2.3
2.3
0.9
1.5
70
(falling).
Units
V
mV
µs
µs
µs
µs
µs
V
V
V
V
CC
247