ATTINY861A-SU Atmel, ATTINY861A-SU Datasheet - Page 115
ATTINY861A-SU
Manufacturer Part Number
ATTINY861A-SU
Description
IC, MCU, 8BIT, 8K FLASH, 20SOIC
Manufacturer
Atmel
Datasheet
1.ATTINY461A-MU.pdf
(292 pages)
Specifications of ATTINY861A-SU
Controller Family/series
ATtiny
No. Of I/o's
16
Eeprom Memory Size
512Byte
Ram Memory Size
512Byte
Cpu Speed
20MHz
No.
RoHS Compliant
Core Size
8bit
Program Memory Size
8KB
Oscillator Type
External, Internal
Rohs Compliant
Yes
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Manufacturer
Quantity
Price
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Part Number:
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12.12.3
8197B–AVR–01/10
TCCR1C – Timer/Counter1 Control Register C
• Bits 7,6 - COM1A1S, COM1A0S: Comparator A Output Mode, Shadow Bits 1 and 0
These are shadow bits of COM1A1 and COM1A0 in TCCR1A. Writing to bits COM1A1S and
COM1A0S will also change bits COM1A1 and COM1A0 in TCCR1A. Similary, changes written
to bits COM1A1 and COM1A0 in TCCR1A will show here.
See
• Bits 5,4 - COM1B1S, COM1B0S: Comparator B Output Mode, Shadow Bits 1 and 0
These are shadow bits of COM1B1 and COM1B0 in TCCR1A. Writing to bits COM1B1S and
COM1B0S will also change bits COM1B1 and COM1B0 in TCCR1A. Similary, changes written
to bits COM1B1 and COM1B0 in TCCR1A will show here.
See
• Bits 3,2 - COM1D1, COM1D0: Comparator D Output Mode, Bits 1 and 0
These bits control the behaviour of the Waveform Output (OCW1D) and the connection of the
Output Compare pin (OC1D). If one or both of the COM1D1:0 bits are set, the OC1D output
overrides the normal port functionality of the I/O pin it is connected to. The complementary
OC1D output is connected only in PWM modes when the COM1D1:0 bits are set to “01”. Note
that the Data Direction Register (DDR) bit corresponding to the OC1D pin must be set in order to
enable the output driver.
The function of the COM1D1:0 bits depends on the PWM1D and WGM11:10 bit settings.
12-18
PWM).
Table 12-18. Compare Output Mode, Normal Mode (non-PWM)
Table 12-19
set to Fast PWM Mode.
Table 12-19. Compare Output Mode, Fast PWM Mode
Bit
0x27 (0x47)
Read/Write
Initial value
COM1D1:0
COM1D1:0
“TCCR1A – Timer/Counter1 Control Register A” on page 110
“TCCR1A – Timer/Counter1 Control Register A” on page 110
00
01
10
11
00
01
10
11
shows the COM1D1:0 bit functionality when the PWM1D bit is set to a Normal Mode (non-
COM1A1S
shows the COM1D1:0 bit functionality when the PWM1D and WGM11:10 bits are
OCW1D Behaviour
Normal port operation.
Cleared on Compare Match. Set when TCNT1=0x000.
Cleared on Compare Match. Set when TCNT1=0x000.
Set on Compare Match. Cleared when TCNT1=0x000.
R/W
7
0
OCW1D Behaviour
Normal port operation.
Toggle on Compare Match.
Clear on Compare Match.
Set on Compare Match.
COM1A0S
R/W
6
0
COM1B1S
R/W
5
0
COM1B0S
R/W
4
0
COM1D1
R/W
3
0
COM1D0
R/W
OC1D Pin
Disconnected
Connected
Connected
Connected
2
0
OC1D Pin
Disconnected
Connected
Connected
Connected
for information on bit usage.
for information on bit usage.
FOC1D
R/W
1
0
PWM1D
R/W
OC1D Pin
Disconnected
Disconnected
Disconnected
Disconnected
Disconnected
Disconnected
OC1D Pin
Disconnected
Connected
0
0
TCCR1C
Table
115
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