ATMEGA8-16AC Atmel, ATMEGA8-16AC Datasheet - Page 94
ATMEGA8-16AC
Manufacturer Part Number
ATMEGA8-16AC
Description
IC AVR MCU 8K 16MHZ COM 32-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA8-16AC
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)
4.5 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
32-TQFP, 32-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA816AC
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Timer/Counter
Timing Diagrams
94
ATmega8(L)
output will be continuously low and if set equal to TOP the output will be set to high for non-
inverted PWM mode. For inverted PWM the output will have the opposite logic values.
If OCR1A is used to define the TOP value (WGM13:0 = 9) and COM1A1:0 = 1, the OC1A output
will toggle with a 50% duty cycle.
The Timer/Counter is a synchronous design and the timer clock (clk
clock enable signal in the following figures. The figures include information on when Interrupt
Flags are set, and when the OCR1x Register is updated with the OCR1x buffer value (only for
modes utilizing double buffering).
Figure 41. Timer/Counter Timing Diagram, Setting of OCF1x, no Prescaling
Figure 42
Figure 42. Timer/Counter Timing Diagram, Setting of OCF1x, with Prescaler (f
Figure 43 on page 95
phase and frequency correct PWM mode the OCR1x Register is updated at BOTTOM. The tim-
TCNTn
OCRnx
OCRnx
OCFnx
TCNTn
OCFnx
(clk
(clk
clk
clk
clk
clk
I/O
I/O
I/O
Tn
I/O
Tn
/1)
/8)
shows the same timing data, but with the prescaler enabled.
OCRnx - 1
shows the count sequence close to TOP in various modes. When using
OCRnx - 1
Figure 41
OCRnx
shows a timing diagram for the setting of OCF1x.
OCRnx
OCRnx Value
OCRnx Value
OCRnx + 1
OCRnx + 1
T1
) is therefore shown as a
clk_I/O
OCRnx + 2
OCRnx + 2
2486Z–AVR–02/11
/8)
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