ATTINY461-15MZ Atmel, ATTINY461-15MZ Datasheet - Page 97

• Manufacturer Part Number: ATTINY461-15MZ
• Description: MCU AVR 4K FLASH 15MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY461-15MZ

• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 16
• Eeprom Size: 256 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

16.4
7753F–AVR–01/11
Output Compare Unit
The comparator continuously compares TCNT1 with the Output Compare Registers (OCR1A,
OCR1B, OCR1C and OCR1D). Whenever TCNT1 equals to the Output Compare Register, the
comparator signals a match. A match will set the Output Compare Flag (OCF1A, OCF1B or
OCF1D) at the next timer clock cycle. If the corresponding interrupt is enabled, the Output Com-
pare Flag generates an Output Compare interrupt. The Output Compare Flag is automatically
cleared when the interrupt is executed. Alternatively, the flag can be cleared by software by writ-
ing a logical one to its I/O bit location. The Waveform Generator uses the match signal to
generate an output according to operating mode set by the PWM1x, WGM10 and Compare Out-
put mode (COM1x1:0) bits. The top and bottom signals are used by the Waveform Generator for
handling the special cases of the extreme values in some modes of operation
Operation” on page
Figure 16-4. Output Compare Unit, Block Diagram
The OCR1x Registers are double buffered when using any of the Pulse Width Modulation
(PWM) modes. For the normal mode of operation, the double buffering is disabled. The double
buffering synchronizes the update of the OCR1x Compare Registers to either top or bottom of
the counting sequence. The synchronization prevents the occurrence of odd-length, non-sym-
metrical PWM pulses, thereby making the output glitch-free. See
During the time between the write and the update operation, a read from OCR1A, OCR1B,
OCR1C or OCR1D will read the contents of the temporary location. This means that the most
recently written value always will read out of OCR1A, OCR1B, OCR1C or OCR1D.
BOTTOM
102.).
FOCn
OCRnx
TOP
10-BIT OCRnx
Figure 16-4
ATtiny261/ATtiny461/ATtiny861
Waveform Generator
=
shows a block diagram of the Output Compare unit.
8-BIT DATA BUS
(10-bit Comparator )
OCWnx
TCnH
10-BIT TCNTn
TCNTn
COMnX1:0
WGM10
Figure 16-5
PWMnx
OCFnx (Int.Req.)
for an example.
(See “Modes of
97