ATTINY44A-SSN Atmel, ATTINY44A-SSN Datasheet - Page 106
ATTINY44A-SSN
Manufacturer Part Number
ATTINY44A-SSN
Description
IC MCU AVR 4KB FLASH 20MHZ 14SOI
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY44A-SSN
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
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
12
Operating Supply Voltage
1.8 V to 5.5 V
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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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12.10.1
12.11 Register Description
12.11.1
106
ATtiny24A/44A/84A
Reusing the Temporary High Byte Register
TCCR1A – Timer/Counter1 Control Register A
Note:
The assembly code example requires that the r17:r16 register pair contains the value to be writ-
ten to TCNT1.
If writing to more than one 16-bit register where the high byte is the same for all registers written,
then the high byte only needs to be written once. However, note that the same rule of atomic
operation described previously also applies in this case.
• Bits 7:6 – COM1A[1:0]: Compare Output Mode for Channel A
• Bits 5:4 – COM1B[1:0]: Compare Output Mode for Channel B
The COM1A[1:0] and COM1B[1:0] control the Output Compare pins (OC1A and OC1B respec-
tively) behavior. If one or both of the COM1A[1:0] bits are written to one, the OC1A output
overrides the normal port functionality of the I/O pin it is connected to. If one or both of the
COM1B[1:0] bit are written to one, the OC1B output overrides the normal port functionality of the
I/O pin it is connected to. However, note that the Data Direction Register (DDR) bit correspond-
ing to the OC1A or OC1B pin must be set in order to enable the output driver.
When the OC1A or OC1B is connected to the pin, the function of the COM1x[1:0] bits is depen-
dent of the WGM1[3:0] bits setting.
Bit
0x2F (0x4F)
Read/Write
Initial Value
C Code Example
void TIM16_WriteTCNT1( unsigned int i )
{
}
unsigned char sreg;
unsigned int i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Set TCNT1 to i */
TCNT1 = i;
/* Restore global interrupt flag */
SREG = sreg;
See
“Code Examples” on page
COM1A1
R/W
7
0
COM1A0
R/W
6
0
COM1B1
R/W
5
0
6.
COM1B0
R/W
4
0
R
3
–
0
R
2
0
–
WGM11
R/W
1
0
WGM10
R/W
0
0
8183C–AVR–03/11
TCCR1A
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