ATTINY44A-MU Atmel, ATTINY44A-MU Datasheet - Page 102

• 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

102
ATtiny24A/44A/84A
Figure 12-11. Timer/Counter Timing Diagram, Setting of OCF1x, with Prescaler (f
Figure 12-12
frequency correct PWM mode the OCR1x Register is updated at BOTTOM. The timing diagrams
will be the same, but TOP should be replaced by BOTTOM, TOP-1 by BOTTOM+1 and so on.
The same renaming applies for modes that set the TOV1 flag at BOTTOM.
Figure 12-12. Timer/Counter Timing Diagram, no Prescaling
Figure 12-13 on page 103
(PC and PFC PWM)
OCRnx
TCNTn
OCFnx
(clk
and ICFn
(CTC and FPWM)
clk
(Update at TOP)
clk
TOVn
I/O
I/O
Tn
OCRnx
TCNTn
TCNTn
(clk
as TOP)
/8)
clk
clk
I/O
(FPWM)
I/O
Tn
/1)
(if used
shows the count sequence close to TOP in various modes. When using phase and
OCRnx - 1
TOP - 1
TOP - 1
shows the same timing data, but with the prescaler enabled.
Old OCRnx Value
OCRnx
OCRnx Value
TOP
TOP
OCRnx + 1
BOTTOM
TOP - 1
New OCRnx Value
BOTTOM + 1
OCRnx + 2
8183C–AVR–03/11
TOP - 2
clk_I/O
/8)