ATtiny5 Atmel Corporation, ATtiny5 Datasheet - Page 76

• Manufacturer Part Number: ATtiny5
• Manufacturer: Atmel Corporation

Specifications of ATtiny5

• Flash (kbytes): 0.5 Kbytes
• Pin Count: 6
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 1
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 4
• Ext Interrupts: 4
• Usb Speed: No
• Usb Interface: No
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 4
• Adc Resolution (bits): 8
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.03
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 125
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 1
• Output Compare Channels: 2
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

11.11.2
76
ATtiny4/5/9/10
TCCR0B – Timer/Counter0 Control Register B
• Bits 1:0 – WGM01:0: Waveform Generation Mode
Combined with WGM03:2 bits of TCCR0B, these bits control the counting sequence of the coun-
ter, the source for maximum (TOP) counter value, and what type of waveform to generate. See
Table
ter), Clear Timer on Compare match (CTC) mode, and three types of Pulse Width Modulation
(PWM) modes.
Table 11-5.
• Bit 7 – ICNC0: Input Capture Noise Canceler
Setting this bit (to one) activates the Input Capture Noise Canceler. When the noise canceler is
activated, the input from the Input Capture pin (ICP0) is filtered. The filter function requires four
successive equal valued samples of the ICP0 pin for changing its output. The Input Capture is
therefore delayed by four oscillator cycles when the noise canceler is enabled.
• Bit 6 – ICES0: Input Capture Edge Select
This bit selects which edge on the Input Capture pin (ICP0) that is used to trigger a capture
event. When the ICES0 bit is written to zero, a falling (negative) edge is used as trigger, and
when the ICES0 bit is written to one, a rising (positive) edge will trigger the capture.
Bit
0x2D
Read/Write
Initial Value
Mode
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
11-5. Modes of operation supported by the Timer/Counter unit are: Normal mode (coun-
WGM
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
3:0
Waveform Generation Modes
ICNC0
(“Modes of Operation” on page
R/W
0
7
0
Mode of Operation
Normal
PWM, Phase Correct, 8-bit
PWM, Phase Correct, 9-bit
PWM, Phase Correct, 10-bit
CTC (
Fast PWM, 8-bit
Fast PWM, 9-bit
Fast PWM, 10-bit
PWM, Phase & Freq. Correct
PWM, Phase & Freq. Correct
PWM, Phase Correct
PWM, Phase Correct
CTC (
(Reserved)
Fast PWM
Fast PWM
ICES0
R/W
6
0
Clear Timer on Compare
Clear Timer on Compare
R
5
–
0
WGM03
R/W
4
0
63).
WGM02
)
)
R/W
3
0
TOP
0xFFFF
0x00FF
0x01FF
0x03FF
OCR0A
0x00FF
0x01FF
0x03FF
ICR0
OCR0A
ICR0
OCR0A
ICR0
–
ICR0
OCR0A
CS02
R/W
2
0
Update of
OCR0
Immediate
TOP
TOP
TOP
Immediate
TOP
TOP
TOP
BOTTOM
BOTTOM
TOP
TOP
Immediate
–
TOP
TOP
CS01
R/W
1
0
x
at
CS00
R/W
0
0
8127E–AVR–11/11
TOV0 Flag
Set on
MAX
BOTTOM
BOTTOM
BOTTOM
MAX
TOP
TOP
TOP
BOTTOM
BOTTOM
BOTTOM
BOTTOM
MAX
–
TOP
TOP
TCCR0B