ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 130

• Manufacturer Part Number: ATmega1284PR231
• Manufacturer: Atmel Corporation

Specifications of ATmega1284PR231

• Flash (kbytes): 128 Kbytes
• Max. Operating Frequency: 20 MHz
• Max I/o Pins: 32
• Spi: 3
• Twi (i2c): 1
• Uart: 2
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Crypto Engine: AES
• Sram (kbytes): 16
• Eeprom (bytes): 4096
• Operating Voltage (vcc): 1.8 to 3.6
• Timers: 3
• Frequency Band: 2.4 GHz
• Max Data Rate (mb/s): 2
• Antenna Diversity: Yes
• External Pa Control: Yes
• Power Output (dbm): 3
• Receiver Sensitivity (dbm): -101
• Receive Current Consumption (ma): 13.2
• Transmit Current Consumption (ma): 14.4
• Link Budget (dbm): 104

8059D–AVR–11/09
Figure 14-11. Timer/Counter Timing Diagram, Setting of OCFnx, with Prescaler (f
Figure 14-12
frequency correct PWM mode the OCRnx Register is updated at BOTTOM. The timing diagrams
will be the same, but TOP should be replaced by BOTTOM, TOP-1 by BOTTOM+1 and so on.
The same renaming applies for modes that set the TOVn Flag at BOTTOM.
Figure 14-12. Timer/Counter Timing Diagram, no Prescaling
Figure 14-13
(PC and PFC PWM)
and ICFn
(CTC and FPWM)
OCRnx
TCNTn
OCFnx
TOVn
(Update at TOP)
(clk
clk
clk
OCRnx
I/O
TCNTn
TCNTn
as TOP)
(clk
I/O
Tn
clk
clk
/8)
I/O
(FPWM)
shows the count sequence close to TOP in various modes. When using phase and
shows the same timing data, but with the prescaler enabled.
I/O
Tn
/1)
(if used
OCRnx - 1
TOP - 1
TOP - 1
Old OCRnx Value
OCRnx
OCRnx Value
TOP
TOP
OCRnx + 1
BOTTOM
TOP - 1
New OCRnx Value
ATmega1284P
OCRnx + 2
BOTTOM + 1
TOP - 2
clk_I/O
/8)
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