ATA6613P-PLQW Atmel, ATA6613P-PLQW Datasheet - Page 170

• Manufacturer Part Number: ATA6613P-PLQW
• Description: MCU W/LIN TXRX REG WTCHDG 48-QFN
• Manufacturer: Atmel
• Series: AVR® ATA66 LIN-SBCr

Specifications of ATA6613P-PLQW

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: I²C, LIN, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 48-QFN Exposed Pad
• Processor Series: ATA6x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 1 KB
• Interface Type: I2C, SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

170
Atmel ATA6612/ATA6613
Figure 6-58. Fast PWM Mode, Timing Diagram
The Timer/Counter Overflow Flag (TOV2) is set each time the counter reaches TOP. If the
interrupt is enabled, the interrupt handler routine can be used for updating the compare value.
In fast PWM mode, the compare unit allows generation of PWM waveforms on the OC2x pin.
Setting the COM2x1:0 bits to two will produce a non-inverted PWM and an inverted PWM out-
put can be generated by setting the COM2x1:0 to three. TOP is defined as 0xFF when
WGM2:0 = 3, and OCR2A when MGM2:0 = 7 (see
value will only be visible on the port pin if the data direction for the port pin is set as output.
The PWM waveform is generated by setting (or clearing) the OC2x Register at the compare
match between OCR2x and TCNT2, and clearing (or setting) the OC2x Register at the timer
clock cycle the counter is cleared (changes from TOP to BOTTOM).
The PWM frequency for the output can be calculated by the following equation:
The N variable represents the prescale factor (1, 8, 32, 64, 128, 256, or 1024).
The extreme values for the OCR2A Register represent special cases when generating a PWM
waveform output in the fast PWM mode. If the OCR2A is set equal to BOTTOM, the output will
be a narrow spike for each MAX+1 timer clock cycle. Setting the OCR2A equal to MAX will
result in a constantly high or low output (depending on the polarity of the output set by the
COM2A1:0 bits.)
A frequency (with 50% duty cycle) waveform output in fast PWM mode can be achieved by
setting OC2x to toggle its logical level on each compare match (COM2x1:0 = 1). The wave-
form generated will have a maximum frequency of f
This feature is similar to the OC2A toggle in CTC mode, except the double buffer feature of the
Output Compare unit is enabled in the fast PWM mode.
f
OCnxPWM
Period
TCNTn
OCn
OCn
=
-------------------- -
N
f
1
clk_I/O
256
2
3
4
5
Table 6-59 on page
oc2
6
= f
clk_I/O
7
/2 when OCR2A is set to zero.
(COMnx1:0 = 2)
(COMnx1:0 = 3)
174). The actual OC2x
TOVn Interrupt Flag Set
OCRnx Interrupt
OCRnx Update and
Flag Set
9111H–AUTO–01/11