ATtiny4 Atmel Corporation, ATtiny4 Datasheet - Page 71

• Manufacturer Part Number: ATtiny4
• Manufacturer: Atmel Corporation

Specifications of ATtiny4

• 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
• 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

8127E–AVR–11/11
Figure 11-13 on page 71
Figure 11-13. Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (f
Figure 11-14 on page 71
using phase and frequency correct PWM mode the OCR0x 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 TOV0 flag at
BOTTOM.
Figure 11-14. Timer/Counter Timing Diagram, no Prescaling
Figure 11-15 on page 72
(PC and PFC PWM)
TCNTn
OCRnx
OCFnx
(clk
and ICFn
(CTC and FPWM)
clk
(Update at TOP)
clk
TOVn
I/O
I/O
Tn
TCNTn
TCNTn
OCRnx
as TOP)
(clk
/8)
clk
clk
I/O
(FPWM)
I/O
Tn
/1)
(if used
OCRnx - 1
shows the same timing data, but with the prescaler enabled.
shows the same timing data, but with the prescaler enabled.
TOP - 1
TOP - 1
shows the count sequence close to TOP in various modes. When
Old OCRnx Value
OCRnx
OCRnx Value
TOP
TOP
OCRnx + 1
BOTTOM
TOP - 1
New OCRnx Value
ATtiny4/5/9/10
BOTTOM + 1
OCRnx + 2
clk_I/O
TOP - 2
/8)
71