ATTINY44A-MU Atmel, ATTINY44A-MU Datasheet - Page 78

• Manufacturer Part Number: ATTINY44A-MU
• Description: IC MCU AVR 4K FLASH 20MHZ 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY44A-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 12
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-MLF®, QFN
• Processor Series: ATTINY4x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI/USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 20-ch x 10-bit
• Data Rom Size: 256 B
• A/d Bit Size: 10 bit
• A/d Channels Available: 20
• Height: 0.74 mm
• Length: 4 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Width: 4 mm
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

78
ATtiny24A/44A/84A
Figure 11-9.
Figure 11-10 on page 78
except CTC mode and PWM mode, where OCR0A is TOP.
Figure 11-10. Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (f
Figure 11-11 on page 78
and fast PWM mode where OCR0A is TOP.
Figure 11-11. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with
TCNTn
TCNTn
TCNTn
(clk
(clk
OCRnx
OCRnx
(clk
OCFnx
(CTC)
OCFnx
TOVn
clk
clk
clk
clk
clk
clk
I/O
I/O
I/O
I/O
I/O
Tn
Tn
I/O
Tn
/8)
/8)
/8)
Timer/Counter Timing Diagram, with Prescaler (f
Prescaler (f
OCRnx - 1
TOP - 1
MAX - 1
shows the setting of OCF0A and the clearing of TCNT0 in CTC mode
shows the setting of OCF0B in all modes and OCF0A in all modes
clk_I/O
/8)
OCRnx
TOP
MAX
OCRnx Value
TOP
OCRnx + 1
BOTTOM
BOTTOM
clk_I/O
/8)
BOTTOM + 1
BOTTOM + 1
8183C–AVR–03/11
OCRnx + 2
clk_I/O
/8)