attiny25v ATMEL Corporation, attiny25v Datasheet - Page 103
attiny25v
Manufacturer Part Number
attiny25v
Description
Microcontroller With 2/4/8k Bytes In-system Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY25V.pdf
(231 pages)
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13.3
13.3.1
2586K–AVR–01/08
Register Description
TCCR1 – Timer/Counter1 Control Register
Table 13-3.
• Bit 7- CTC1 : Clear Timer/Counter on Compare Match
When the CTC1 control bit is set (one), Timer/Counter1 is reset to $00 in the CPU clock cycle
after a compare match with OCR1A register. If the control bit is cleared, Timer/Counter1 contin-
ues counting and is unaffected by a compare match.
• Bit 6 - PWM1A: Pulse Width Modulator A Enable
When set (one) this bit enables PWM mode based on comparator OCR1A in Timer/Counter1
and the counter value is reset to $00 in the CPU clock cycle after a compare match with OCR1C
register value.
Bit
0x30
Read/Write
Initial value
PWM Frequency
100 kHz
110 kHz
120 kHz
130 kHz
140 kHz
150 kHz
160 kHz
170 kHz
180 kHz
190 kHz
200 kHz
250 kHz
300 kHz
350 kHz
400 kHz
450 kHz
500 kHz
80 kHz
90 kHz
CTC1
Timer/Counter1 Clock Prescale Select in the Asynchronous Mode (Continued)
R/W
7
0
PWM1A
R/W
6
0
Clock Selection
PCK/4
PCK/4
PCK/4
PCK/4
PCK/4
PCK/2
PCK/2
PCK/2
PCK/2
PCK/2
PCK/2
PCK/2
PCK/2
PCK
PCK
PCK
PCK
PCK
PCK
COM1A1
R/W
5
0
COM1A0
R/W
4
0
CS13..CS10
0011
0011
0011
0011
0011
0010
0010
0010
0010
0010
0010
0010
0010
0001
0001
0001
0001
0001
0001
CS13
R/W
3
0
CS12
R/W
2
0
OCR1C
ATtiny25/45/85
199
177
159
144
132
245
228
212
199
187
177
167
159
255
212
182
159
141
127
CS11
R/W
1
0
RESOLUTION
CS10
R/W
0
0
7.6
7.5
7.3
7.2
7.1
7.9
7.8
7.7
7.6
7.6
7.5
7.4
7.3
8.0
7.7
7.5
7.3
7.1
7.0
TCCR1A
103
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