ATMEGA8A-MUR Atmel, ATMEGA8A-MUR Datasheet - Page 76
ATMEGA8A-MUR
Manufacturer Part Number
ATMEGA8A-MUR
Description
MCU AVR 8KB FLASH 16MHZ 32QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Datasheet
1.ATMEGA8A-MU.pdf
(308 pages)
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
- Current page: 76 of 308
- Download datasheet (6Mb)
8159D–AVR–02/11
Figure 15-1. T1/T0 Pin Sampling
The synchronization and edge detector logic introduces a delay of 2.5 to 3.5 system clock cycles
from an edge has been applied to the T1/T0 pin to the counter is updated.
Enabling and disabling of the clock input must be done when T1/T0 has been stable for at least
one system clock cycle, otherwise it is a risk that a false Timer/Counter clock pulse is generated.
Each half period of the external clock applied must be longer than one system clock cycle to
ensure correct sampling. The external clock must be guaranteed to have less than half the sys-
tem clock frequency (f
sampling, the maximum frequency of an external clock it can detect is half the sampling fre-
quency (Nyquist sampling theorem). However, due to variation of the system clock frequency
and duty cycle caused by Oscillator source (crystal, resonator, and capacitors) tolerances, it is
recommended that maximum frequency of an external clock source is less than f
An external clock source can not be prescaled.
Figure 15-2. Prescaler for Timer/Counter0 and Timer/Counter1
Note:
PSR10
clk
T0
T1
clk
Tn
I/O
1. The synchronization logic on the input pins (
I/O
Synchronization
Synchronization
D Q
LE
Synchronization
ExtClk
D Q
< f
clk_I/O
/2) given a 50/50% duty cycle. Since the edge detector uses
clk
Clear
T1
T1/T0)
D Q
is shown in
Edge Detector
(1)
Figure
ATmega8A
15-1.
clk
Tn_sync
(To Clock
Select Logic)
T0
clk_I/O
/2.5.
76
Related parts for ATMEGA8A-MUR
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
MCU AVR 8K FLASH 16MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8K FLASH 16MHZ 28-PDIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8KB FLASH 16MHZ 32TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
8-bit Microcontrollers - MCU AVR 8KB FL 512B EE 1KB SRAM 16 MHZ GRN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 8K 16MHZ 5V 32TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 8K 16MHZ 5V 32-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 8K 16MHZ 5V 28DIP
Manufacturer:
Atmel
Datasheet: