ATTINY13-20SQR Atmel, ATTINY13-20SQR Datasheet - Page 69

• Manufacturer Part Number: ATTINY13-20SQR
• Description: IC MCU AVR 1KB FLASH 20MHZ 8SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY13-20SQR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 6
• Program Memory Size: 1KB (512 x 16)
• Program Memory Type: FLASH
• Eeprom Size: 64 x 8
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-SOIC (0.200", 5.30mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Connectivity: -

11.9
11.9.1
2535J–AVR–08/10
Register Description
TCCR0A – Timer/Counter Control Register A
Figure 11-11. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with Pres-
• Bits 7:6 – COM01A:0: Compare Match Output A Mode
These bits control the Output Compare pin (OC0A) behavior. If one or both of the COM0A1:0
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 COM0A1:0 bits depends on the
WGM02:0 bit setting.
Table 11-2
CTC mode (non-PWM).
Table 11-2.
Table 11-3 on page 70
fast PWM mode.
TCNTn
(clk
OCRnx
(CTC)
OCFnx
Bit
Read/Write
Initial Value
clk
clk
I/O
COM01
I/O
Tn
/8)
0
0
1
1
shows the COM0A1:0 bit functionality when the WGM02:0 bits are set to a normal or
caler (f
Compare Output Mode, non-PWM Mode
COM0A1
R/W
7
0
COM00
0
1
0
1
clk_I/O
TOP - 1
shows the COM0A1:0 bit functionality when the WGM01:0 bits are set to
COM0A0
R/W
/8)
6
0
Description
Normal port operation, OC0A disconnected.
Toggle OC0A on Compare Match
Clear OC0A on Compare Match
Set OC0A on Compare Match
COM0B1
R/W
5
0
COM0B0
R/W
TOP
4
0
TOP
3
R
0
–
R
BOTTOM
2
–
0
WGM01
R/W
1
0
WGM00
R/W
0
0
BOTTOM + 1
TCCR0A
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