ATMEGA169V-1MC Atmel, ATMEGA169V-1MC Datasheet - Page 88

• Manufacturer Part Number: ATMEGA169V-1MC
• Description: IC MCU AVR 16K 1.8V 1MHZ 64-QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA169V-1MC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 1MHz
• Connectivity: SPI, UART/USART, USI
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 16KB (8K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 64-MLF®, 64-QFN
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

Timer/Counter Timing
Diagrams
88
ATmega169V/L
•
The Timer/Counter is a synchronous design and the timer clock (clk
shown as a clock enable signal in the following figures. The figures include information
on when Interrupt Flags are set. Figure 33 contains timing data for basic Timer/Counter
operation. The figure shows the count sequence close to the MAX value in all modes
other than phase correct PWM mode.
Figure 33. Timer/Counter Timing Diagram, no Prescaling
Figure 34 shows the same timing data, but with the prescaler enabled.
Figure 34. Timer/Counter Timing Diagram, with Prescaler (f
Figure 35 shows the setting of OCF0A in all modes except CTC mode.
Figure 35. Timer/Counter Timing Diagram, Setting of OCF0A, with Prescaler (f
TCNTn
TCNTn
TCNTn
(clk
(clk
(clk
OCRnx
TOVn
TOVn
OCFnx
clk
clk
clk
clk
clk
clk
I/O
I/O
I/O
The timer starts counting from a value higher than the one in OCR0A, and for that
reason misses the Compare Match and hence the OCn change that would have
happened on the way up.
I/O
I/O
I/O
Tn
Tn
Tn
/1)
/8)
/8)
OCRnx - 1
MAX - 1
MAX - 1
OCRnx
MAX
MAX
OCRnx Value
OCRnx + 1
BOTTOM
BOTTOM
clk_I/O
/8)
T0
) is therefore
2514H–AVR–05/03
BOTTOM + 1
BOTTOM + 1
OCRnx + 2
clk_I/O
/8)