ATTINY44A-SSU Atmel, ATTINY44A-SSU Datasheet - Page 79
ATTINY44A-SSU
Manufacturer Part Number
ATTINY44A-SSU
Description
IC MCU AVR 4K FLASH 20MHZ 14SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY44A-SSU
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
14-SOIC (3.9mm Width), 14-SOL
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
For Use With
ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIP770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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11.9
11.9.1
8183C–AVR–03/11
Register Description
TCCR0A – Timer/Counter Control Register A
• Bits 7:6 – COM0A[1:0]: Compare Match Output A Mode
These bits control the Output Compare pin (OC0A) behavior. If one or both of the COM0A[1:0]
bits are set, the OC0A output overrides the normal port functionality of the I/O pin it is connected
to. However, note that the Data Direction Register (DDR) bit corresponding to the OC0A pin
must be set in order to enable the output driver.
When OC0A is connected to the pin, the function of the COM0A[1:0] bits depends on the
WGM0[2:0] bit setting.
bits are set to a normal or CTC mode (non-PWM).
Table 11-2.
Table 11-3
Table 11-3.
Note:
Bit
0x30 (0x50)
Read/Write
Initial Value
COM0A1
COM0A1
0
0
1
1
0
0
1
1
1. A special case occurs when OCR0A equals TOP and COM0A1 is set. In this case, the Com-
shows COM0A[1:0] bit functionality when WGM0[1:0] bits are set to fast PWM mode.
pare Match is ignored, but the set or clear is done at BOTTOM. See
page 74
Compare Output Mode, non-PWM Mode
Compare Output Mode, Fast PWM Mode
COM0A1
R/W
COM0A0
COM0A0
7
0
for more details.
0
1
0
1
0
1
0
1
Table 11-2
COM0A0
R/W
6
0
Description
Normal port operation, OC0A disconnected
WGM02 = 0: Normal Port Operation, OC0A Disconnected
WGM02 = 1: Toggle OC0A on Compare Match
Clear OC0A on Compare Match
Set OC0A at BOTTOM (non-inverting mode)
Set OC0A on Compare Match
Clear OC0A at BOTTOM (inverting mode)
Description
Normal port operation, OC0A disconnected.
Toggle OC0A on Compare Match
Clear OC0A on Compare Match
Set OC0A on Compare Match
COM0B1
shows the COM0A[1:0] bit functionality when the WGM0[2:0]
R/W
5
0
COM0B0
R/W
4
0
3
R
0
–
(1)
ATtiny24A/44A/84A
R
2
–
0
WGM01
R/W
1
0
“Fast PWM Mode” on
WGM00
R/W
0
0
TCCR0A
79
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