ATTINY461-20PU Atmel, ATTINY461-20PU Datasheet - Page 114
ATTINY461-20PU
Manufacturer Part Number
ATTINY461-20PU
Description
Microcontrollers (MCU) 4kB Flash 0.256kB EEPROM 16 I/O Pins
Manufacturer
Atmel
Specifications of ATTINY461-20PU
Processor Series
ATTINY4x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
2-Wire/SPI/USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
2
Operating Supply Voltage
4.5 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
Through Hole
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 40 C
On-chip Adc
11-ch x 10-bit
Program Memory Type
Flash
Program Memory Size
4 KB
Package / Case
PDIP-20
Package
20PDIP
Device Core
AVR
Family Name
ATtiny
Maximum Speed
20 MHz
Ram Size
256 Byte
Operating Temperature
-40 to 85 °C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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ATtiny261/461/861
• Bits 5,4 – COM1B1, COM1B0: Comparator B Output Mode, Bits 1 and 0
These bits control the behaviour of the Waveform Output (OCW1B) and the connection of the
Output Compare pin (OC1B). If one or both of the COM1B1:0 bits are set, the OC1B output
overrides the normal port functionality of the I/O pin it is connected to. The complementary
OC1B output is connected only in PWM modes when the COM1B1:0 bits are set to “01”. Note
that the Data Direction Register (DDR) bit corresponding to the OC1B pin must be set in order to
enable the output driver.
The function of the COM1B1:0 bits depends on the PWM1B and WGM11:10 bit settings.
12-13
PWM).
Table 12-13. Compare Output Mode, Normal Mode (non-PWM)
Table 12-14
set to Fast PWM Mode.
Table 12-14. Compare Output Mode, Fast PWM Mode
Table 12-15
set to Phase and Frequency Correct PWM Mode.
Table 12-15. Compare Output Mode, Phase and Frequency Correct PWM Mode
Bits COM1B1 and COM1B0 are shadowed in TCCR1C. Writing to bits COM1B1 and COM1B0
will also change bits COM1B1S and COM1B0S in TCCR1C. Similary, changes written to bits
COM1B1:0
COM1B1:0
COM1B1:0
00
01
10
00
01
10
00
01
10
11
11
11
shows the COM1B1:0 bit functionality when the PWM1B bit is set to Normal Mode (non-
shows the COM1B1:0 bit functionality when the PWM1B and WGM11:10 bits are
shows the COM1B1:0 bit functionality when the PWM1B and WGM11:10 bits are
OCW1B Behaviour
Normal port operation.
Toggle on Compare Match.
Clear on Compare Match.
Set on Compare Match.
OCW1B 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.
OCW1B Behaviour
Normal port operation.
Cleared on Compare Match when up-counting.
Set on Compare Match when down-counting.
Cleared on Compare Match when up-counting.
Set on Compare Match when down-counting.
Set on Compare Match when up-counting.
Cleared on Compare Match when down-counting.
OC1B Pin
Connected
Connected
Connected
OC1B Pin
Disconnected
Connected
Connected
Connected
Disconnected
OC1B Pin
Disconnected
Connected
Connected
Connected
OC1B Pin
Disconnected
Connected
Disconnected
Disconnected
OC1B Pin
Disconnected
Disconnected
Disconnected
Disconnected
OC1B Pin
Disconnected
Connected
Disconnected
Disconnected
2588E–AVR–08/10
Table
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