attiny25v ATMEL Corporation, attiny25v Datasheet - Page 104
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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104
ATtiny25/45/85
• Bits 5,4 - COM1A1, COM1A0: Comparator A Output Mode, Bits 1 and 0
The COM1A1 and COM1A0 control bits determine any output pin action following a compare
match with compare register A in Timer/Counter1. Output pin actions affect pin PB1 (OC1A).
Since this is an alternative function to an I/O port, the corresponding direction control bit must be
set (one) in order to control an output pin.
Table 13-4.
In PWM mode, these bits have different functions. Refer to
detailed description.
• Bits 3:0 - CS13, CS12, CS11, CS10: Clock Select Bits 3, 2, 1, and 0
The Clock Select bits 3, 2, 1, and 0 define the prescaling source of Timer/Counter1.
Table 13-5.
The Stop condition provides a Timer Enable/Disable function.
COM1A1
0
0
1
1
CS13
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
Comparator A Mode Select
Timer/Counter1 Prescale Select
COM1A0
0
1
0
1
CS12
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
Description
Timer/Counter Comparator A disconnected from output pin OC1A.
Toggle the OC1A output line.
Clear the OC1A output line.
Set the OC1A output line
CS11
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CS10
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Table 13-1 on page 101
T/C1 Clock
T/C1 stopped
PCK
PCK/2
PCK/4
PCK/8
CK
CK/2
CK/4
CK/8
CK/16
CK/32
CK/64
CK/128
CK/256
CK/512
CK/1024
2586K–AVR–01/08
for a
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