ATTINY461-20SUR Atmel, ATTINY461-20SUR Datasheet - Page 89

• Manufacturer Part Number: ATTINY461-20SUR
• Description: MCU AVR 4KB FLASH 20MHZ 20SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY461-20SUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

12. Timer/Counter1
12.1
12.2
2588E–AVR–08/10
Features
Overview
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Timer/Counter1 is a general purpose high speed Timer/Counter module, with three independent
Output Compare Units, and with PWM support.
The Timer/Counter1 features a high resolution and a high accuracy usage with the lower pres-
caling opportunities. It can also support three accurate and high speed Pulse Width Modulators
using clock speeds up to 64 MHz. In PWM mode Timer/Counter1 and the output compare regis-
ters serve as triple stand-alone PWMs with non-overlapping non-inverted and inverted outputs.
Similarly, the high prescaling opportunities make this unit useful for lower speed functions or
exact timing functions with infrequent actions. A simplified block diagram of the Timer/Counter1
is shown in
Figure 12-1. Timer/Counter1 Block Diagram
8/10-Bit Accuracy
Three Independent Output Compare Units
Clear Timer on Compare Match (Auto Reload)
Glitch Free, Phase and Frequency Correct Pulse Width Modulator (PWM)
Variable PWM Period
High Speed Asynchronous and Synchronous Clocking with Dedicated Prescaler
Independent Dead Time Generators for Each PWM Channel
Fault Protection Unit Can Disable PWM Output Pins
Five Independent Interrupt Sources (TOV1, OCF1A, OCD1B, OCF1D, FPF1)
TOV1
REGISTER (TIMSK)
T/C INT. MASK
TIMER/COUNTER1
8-BIT OUTPUT COMPARE
COMPARE REGISTER A
10-BIT COMPARATOR
REGISTER A (OCR1A)
(TCNT1)
OCF1A
10-BIT OUTPUT
Figure
OCF1B
REGISTER (TIFR)
12-1.
T/C INT. FLAG
CLK
COUNT
CLEAR
DIRECTION
OCF1D
10-BIT COMPARATOR
COMPARE REGISTER B
8-BIT OUTPUT COMPARE
REGISTER B (OCR1B)
10-BIT OUTPUT
DEAD TIME GENERATOR
OC1A
REGISTER A (TCCR1A)
T/C CONTROL
8-BIT DATABUS
OC1A
8-BIT OUTPUT COMPARE
COMPARE REGISTER C
10-BIT COMPARATOR
REGISTER C (OCR1C)
10-BIT OUTPUT
DEAD TIME GENERATOR
OC1B
REGISTER B (TCCR1B)
TIMER/COUNTER1 CONTROL LOGIC
T/C CONTROL
OC1B
8-BIT OUTPUT COMPARE
COMPARE REGISTER D
REGISTER D (OCR1D)
10-BIT COMPARATOR
10-BIT OUTPUT
REGISTER C (TCCR1C)
DEAD TIME GENERATOR
OC1D
T/C CONTROL
OC1D
2-BIT HIGH BYTE
REGISTER (TC1H)
REGISTER D (TCCR1E)
REGISTER C (TCCR1D)
FAULT_PROTECTION
T/C CONTROL
T/C CONTROL
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