ATMEGA644P-A15MZ Atmel, ATMEGA644P-A15MZ Datasheet - Page 131

• Manufacturer Part Number: ATMEGA644P-A15MZ
• Description: MCU AVR 64KB FLASH 16MHZ 44QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA644P-A15MZ

• Package / Case: 44-VQFN Exposed Pad
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 32
• Eeprom Size: 2K x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Program Memory Size: 64KB (64K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.11 Register Description
14.11.1
7674F–AVR–09/09
TCCR1A – Timer/Counter1 Control Register A
Figure 14-12. Timer/Counter Timing Diagram, no Prescaling
Figure 14-13
Figure 14-13. Timer/Counter Timing Diagram, with Prescaler (f
• Bit 7:6 – COMnA1:0: Compare Output Mode for Channel A
• Bit 5:4 – COMnB1:0: Compare Output Mode for Channel B
Bit
(0x80)
Read/Write
Initial Value
(PC and PFC PWM)
and ICF n
and ICFn
(CTC and FPWM)
TOVn
(Update at TOP)
(PC and PFC PWM)
TOVn
(CTC and FPWM)
(Update at TOP)
TCNTn
TCNTn
OCRnx
as TOP)
(clk
TCNTn
TCNTn
OCRnx
(clk
as TOP)
clk
clk
clk
clk
I/O
I/O
(FPWM)
(FPWM)
shows the same timing data, but with the prescaler enabled.
I/O
I/O
Tn
Tn
/8)
/1)
(if used
COM1A1
(if used
R/W
7
0
COM1A0
R/W
6
0
TOP - 1
TOP - 1
TOP - 1
TOP - 1
Old OCRnx Value
Old OCRnx Value
COM1B1
R/W
5
0
COM1B0
R/W
4
0
TOP
TOP
TOP
TOP
ATmega164P/324P/644P
R
3
–
0
BOTTOM
BOTTOM
TOP - 1
TOP - 1
clk_I/O
R
2
–
0
New OCRnx Value
New OCRnx Value
/8)
WGM11
R/W
1
0
BOTTOM + 1
BOTTOM + 1
TOP - 2
TOP - 2
WGM10
R/W
0
0
TCCR1A
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