ATmega64 Atmel Corporation, ATmega64 Datasheet - Page 139

• Manufacturer Part Number: ATmega64
• Manufacturer: Atmel Corporation

Specifications of ATmega64

• Flash (kbytes): 64 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 53
• Ext Interrupts: 8
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 4
• Eeprom (bytes): 2048
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 8
• Input Capture Channels: 2
• Pwm Channels: 7
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

OCR1AH and OCR1AL
–Output Compare
Register 1 A
OCR1BH and OCR1BL
– Output Compare
Register 1 B
OCR1CH and OCR1CL
– Output Compare
Register 1 C
OCR3AH and OCR3AL
– Output Compare
Register 3 A
OCR3BH and OCR3BL
– Output Compare
Register 3 B
OCR3CH and OCR3CL
– Output Compare
Register 3 C
2490Q–AVR–06/10
The Output Compare Registers contain a 16-bit value that is continuously compared with the
counter value (TCNTn). A match can be used to generate an Output Compare interrupt, or to
generate a waveform output on the OCnx pin.
The Output Compare Registers are 16-bit in size. To ensure that both the high and low bytes are
written simultaneously when the CPU writes to these registers, the access is performed using an
8-bit temporary high byte register (TEMP). This temporary register is shared by all the other 16-
bit registers.
Bit
0x2B (0x4B)
0x2A (0x4A)
Read/Write
Initial Value
Bit
0x29 (0x49)
0x28 (0x48)
Read/Write
Initial Value
Bit
(0x79)
(0x78)
Read/Write
Initial Value
Bit
(0x87)
(0x86)
Read/Write
Initial Value
Bit
(0x85)
(0x84)
Read/Write
Initial Value
Bit
(0x83)
(0x82)
Read/Write
Initial Value
See “Accessing 16-bit Registers” on page 115.
R/W
R/W
R/W
R/W
R/W
R/W
7
0
7
0
7
0
7
0
7
0
7
0
R/W
R/W
R/W
R/W
R/W
R/W
6
0
6
0
6
0
6
0
6
0
6
0
R/W
R/W
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
5
0
5
0
R/W
R/W
R/W
R/W
R/W
R/W
OCR1A[15:8]
OCR1B[15:8]
OCR1C[15:8]
OCR3A[15:8]
OCR3B[15:8]
OCR3C[15:8]
4
0
4
0
4
0
4
0
4
0
4
0
OCR1A[7:0]
OCR1B[7:0]
OCR1C[7:0]
OCR3A[7:0]
OCR3B[7:0]
OCR3C[7:0]
R/W
R/W
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
0
3
0
3
0
R/W
R/W
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
2
0
2
0
R/W
R/W
R/W
R/W
R/W
R/W
1
0
1
0
1
0
1
0
1
0
1
0
ATmega64(L)
R/W
R/W
R/W
R/W
R/W
R/W
0
0
0
0
0
0
0
0
0
0
0
0
OCR1AH
OCR1BH
OCR1CH
OCR3AH
OCR3BH
OCR3CH
OCR1AL
OCR1BL
OCR1CL
OCR3AL
OCR3BL
OCR3CL
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