AT90USB646-AUR Atmel, AT90USB646-AUR Datasheet - Page 110

• Manufacturer Part Number: AT90USB646-AUR
• Description: MCU AVR 64K FLASH 16MHZ 64TQFP
• Manufacturer: Atmel
• Series: AVR® 90USBr

Specifications of AT90USB646-AUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, I²C, SPI, UART/USART, USB, USB OTG
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TQFP, 64-VQFP
• Data Bus Width: 8 bit
• Data Ram Size: 4 KB
• Interface Type: SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 4
• Maximum Operating Temperature: + 85 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

13.8
13.8.1
110
8-bit Timer/Counter Register Description
AT90USB64/128
Timer/Counter Control Register A – TCCR0A
Figure 13-9. Timer/Counter Timing Diagram, with Prescaler (f
Figure 13-10
mode and PWM mode, where OCR0A is TOP.
Figure 13-10. Timer/Counter Timing Diagram, Setting of OCF0x, with Prescaler (f
Figure 13-11
PWM mode where OCR0A is TOP.
Figure 13-11. Timer/Counter Timing Diagram, Clear Timer on Compare Match mode, with Pres-
Bit
Read/Write
TCNTn
TCNTn
TCNTn
(clk
(clk
(clk
OCRnx
OCRnx
TOVn
OCFnx
(CTC)
OCFnx
clk
clk
clk
clk
clk
clk
I/O
I/O
I/O
I/O
I/O
I/O
Tn
Tn
Tn
/8)
/8)
/8)
7
COM0A
1
R/W
shows the setting of OCF0B in all modes and OCF0A in all modes except CTC
shows the setting of OCF0A and the clearing of TCNT0 in CTC mode and fast
caler (f
clk_I/O
6
COM0A
0
R/W
OCRnx - 1
MAX - 1
TOP - 1
/8)
5
COM0B
1
R/W
4
COM0B
0
R/W
OCRnx
MAX
TOP
3
–
R
OCRnx Value
TOP
2
–
R
OCRnx + 1
BOTTOM
BOTTOM
clk_I/O
1
WGM0
1
R/W
/8)
0
WGM0
0
R/W
BOTTOM + 1
BOTTOM + 1
OCRnx + 2
TCCR0A
clk_I/O
7593K–AVR–11/09
/8)