ATtiny26 Atmel Corporation, ATtiny26 Datasheet - Page 76

• Manufacturer Part Number: ATtiny26
• Manufacturer: Atmel Corporation

Specifications of ATtiny26

• Flash (kbytes): 2 Kbytes
• Pin Count: 20
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 16
• Ext Interrupts: 11
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 11
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.12
• Eeprom (bytes): 128
• Self Program Memory: NO
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 2
• Output Compare Channels: 3
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

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ATtiny26(L)
Table 36. PWM Outputs OCR1x = $00 or OCR1C, x = A or B
In PWM mode, the Timer Overflow Flag – TOV1, is set as in normal Timer/Counter mode. Timer
Overflow Interrupt1 operates exactly as in normal Timer/Counter mode, i.e., it is executed when
TOV1 is set provided that Timer Overflow Interrupt and global interrupts are enabled. This also
applies to the Timer Output Compare flags and interrupts.
The frequency of the PWM will be Timer Clock 1 Frequency divided by (OCR1C value + 1). See
the following equation:
Resolution shows how many bit is required to express the value in the OCR1C Register. It is cal-
culated by following equation
COM1x1
0
0
1
1
1
1
COM1x0
1
1
0
0
1
1
Resolution
OCR1C
OCR1C
OCR1C
OCR1x
$00
$00
$00
f
PWM
PWM
=
----------------------------------- -
(
= log
OCR1C + 1
Output OC1x
f
TCK1
2
(OCR1C + 1)
H
H
H
L
L
L
)
Not connected
Not connected
Not connected
Not connected
Output OC1x
H
L
1477K–AVR–08/10