ATTIny2313-16MI ATMEL Corporation, ATTIny2313-16MI Datasheet - Page 105
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ATTIny2313-16MI
Manufacturer Part Number
ATTIny2313-16MI
Description
8-bit AVR Microcontroller with 2K Bytes In-System Programmable Flash
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY2313-16MI.pdf
(211 pages)
- Current page: 105 of 211
- Download datasheet (3Mb)
16-bit Timer/Counter
Register Description
Timer/Counter1 Control
Register A – TCCR1A
2543C–AVR–12/03
• Bit 7:6 – COM1A1:0: Compare Output Mode for Channel A
• Bit 5:4 – COM1B1:0: Compare Output Mode for Channel B
The COM1A1:0 and COM1B1:0 control the Output Compare pins (OC1A and OC1B
respectively) behavior. If one or both of the COM1A1:0 bits are written to one, the OC1A
output overrides the normal port functionality of the I/O pin it is connected to. If one or
both of the COM1B1:0 bit are written to one, the OC1B output overrides the normal port
functionality of the I/O pin it is connected to. However, note that the Data Direction Reg-
ister (DDR) bit corresponding to the OC1A or OC1B pin must be set in order to enable
the output driver.
When the OC1A or OC1B is connected to the pin, the function of the COM1x1:0 bits is
dependent of the WGM13:0 bits setting. Table 44 shows the COM1x1:0 bit functionality
when the WGM13:0 bits are set to a Normal or a CTC mode (non-PWM).
Table 44. Compare Output Mode, non-PWM
Table 45 shows the COM1x1:0 bit functionality when the WGM13:0 bits are set to the
fast PWM mode.
Table 45. Compare Output Mode, Fast PWM
Bit
Read/Write
Initial Value
COM1A1/COM1B1
COM1A1/COM1B1
0
0
1
1
0
0
1
1
COM1A1
R/W
7
0
COM1A0
COM1A0/COM1B0
COM1A0/COM1B0
R/W
6
0
0
1
0
1
0
1
0
1
COM1B1
R/W
5
0
COM1B0
R/W
4
0
Description
Normal port operation, OC1A/OC1B
disconnected.
Toggle OC1A/OC1B on Compare Match.
Clear OC1A/OC1B on Compare Match (Set
output to low level).
Set OC1A/OC1B on Compare Match (Set output
to high level).
Description
Normal port operation, OC1A/OC1B
disconnected.
WGM13=0: Normal port operation, OC1A/OC1B
disconnected.
WGM13=1: Toggle OC1A on Compare Match,
OC1B reserved.
Clear OC1A/OC1B on Compare Match, set
OC1A/OC1B at TOP
Set OC1A/OC1B on Compare Match, clear
OC1A/OC1B at TOP
(1)
R
3
–
0
R
2
–
0
ATtiny2313/V
WGM11
R/W
1
0
WGM10
R/W
0
0
TCCR1A
105
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