ATTINY261A-PU Atmel, ATTINY261A-PU Datasheet - Page 120
ATTINY261A-PU
Manufacturer Part Number
ATTINY261A-PU
Description
IC, MCU, 8BIT, 2K FLASH, 20PDIP
Manufacturer
Atmel
Datasheet
1.ATTINY461A-MU.pdf
(292 pages)
Specifications of ATTINY261A-PU
Controller Family/series
ATtiny
No. Of I/o's
16
Eeprom Memory Size
128Byte
Ram Memory Size
128Byte
Cpu Speed
20MHz
No.
RoHS Compliant
Core Size
8bit
Program Memory Size
2KB
Oscillator Type
External, Internal
Rohs Compliant
Yes
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12.12.10 OCR1B – Timer/Counter1 Output Compare Register B
12.12.11 OCR1C – Timer/Counter1 Output Compare Register C
12.12.12 OCR1D – Timer/Counter1 Output Compare Register D
120
ATtiny261A/461A/861A
The output compare register B is an 8-bit read/write register.
The Timer/Counter Output Compare Register B contains data to be continuously compared with
Timer/Counter1. Actions on compare matches are specified in TCCR1. A compare match does
only occur if Timer/Counter1 counts to the OCR1B value. A software write that sets TCNT1 and
OCR1B to the same value does not generate a compare match.
A compare match will set the compare interrupt flag OCF1B after a synchronization delay follow-
ing the compare event.
Note that, if 10-bit accuracy is used special procedures must be followed when accessing the
internal 10-bit Output Compare Registers via the 8-bit AVR data bus. These procedures are
described in section
The output compare register C is an 8-bit read/write register.
The Timer/Counter Output Compare Register C contains data to be continuously compared with
Timer/Counter1, and a compare match will clear TCNT1. This register has the same function in
Normal mode and PWM modes.
Note that, if a smaller value than three is written to the Output Compare Register C, the value is
automatically replaced by three as it is a minumum value allowed to be written to this register.
Note that, if 10-bit accuracy is used special procedures must be followed when accessing the
internal 10-bit Output Compare Registers via the 8-bit AVR data bus. These procedures are
described in section
The output compare register D is an 8-bit read/write register.
The Timer/Counter Output Compare Register D contains data to be continuously compared with
Timer/Counter1. Actions on compare matches are specified in TCCR1A. A compare match does
only occur if Timer/Counter1 counts to the OCR1D value. A software write that sets TCNT1 and
OCR1D to the same value does not generate a compare match.
A compare match will set the compare interrupt flag OCF1D after a synchronization delay follow-
ing the compare event.
Bit
0x2C (0x4C)
Read/Write
Initial value
Bit
0x2B (0x4B)
Read/Write
Initial value
Bit
0x2A (0x4A)
Read/Write
Initial value
MSB
MSB
MSB
R/W
R/W
R/W
7
0
7
1
7
0
“Accessing 10-Bit Registers” on page
“Accessing 10-Bit Registers” on page
R/W
R/W
R/W
6
0
6
1
6
0
R/W
R/W
R/W
5
0
5
1
5
0
R/W
R/W
R/W
4
0
4
1
4
0
R/W
R/W
R/W
3
0
3
1
3
0
106.
106.
R/W
R/W
R/W
2
0
2
1
2
0
R/W
R/W
R/W
1
0
1
1
1
0
LSB
R/W
LSB
R/W
LSB
R/W
0
0
0
1
0
0
8197B–AVR–01/10
OCR1D
OCR1B
OCR1C
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