attiny15l ATMEL Corporation, attiny15l Datasheet - Page 33

• Manufacturer Part Number: attiny15l
• Description: Attiny15l 8-bit Microcontroller With 1k Byte Flash
• Manufacturer: ATMEL Corporation

1187H–AVR–09/07
The frequency of the PWM will be Timer Clock Frequency divided by OCR1B value + 1.
Table 14. Timer/Counter1 Clock Prescale Select
The exact duty-cycle of the non-inverted PWM output is:
Where:
T
T
T1
PCK
is the period of the selected Timer/Counter1 Clock Source.
Clock Selection
is the period of the PCK Clock (39.1 ns).
PCK/8
PCK/4
PCK/4
PCK/2
PCK/2
PCK/2
PCK/2
PCK/2
PCK
PCK
PCK
PCK
PCK
PCK
CK
(
-------------------------------------------------------------------- -
OCR1A +1
(
OCR1B +1
OCR1B
159
213
159
255
213
181
159
141
255
231
213
195
181
169
159
) T
×
)
T1
×
T
–
T1
T
PCK
PWM Frequency
100 kHz
110 kHz
120 kHz
130 kHz
140 kHz
150 kHz
10 kHz
20 kHz
30 kHz
40 kHz
50 kHz
60 kHz
70 kHz
80 kHz
90 kHz
ATtiny15L
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