ATmega1280R212 Atmel Corporation, ATmega1280R212 Datasheet - Page 174
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ATmega1280R212
Manufacturer Part Number
ATmega1280R212
Description
Manufacturer
Atmel Corporation
Specifications of ATmega1280R212
Flash (kbytes)
128 Kbytes
Max. Operating Frequency
16 MHz
Max I/o Pins
86
Spi
5
Twi (i2c)
1
Uart
4
Adc Channels
16
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
AES
Sram (kbytes)
8
Eeprom (bytes)
4096
Operating Voltage (vcc)
1.8 to 3.6
Timers
6
Frequency Band
700/800/900MHz
Max Data Rate (mb/s)
1
Antenna Diversity
No
External Pa Control
Yes
Power Output (dbm)
10
Receiver Sensitivity (dbm)
-110
Receive Current Consumption (ma)
9.0
Transmit Current Consumption (ma)
18 at 5dBm
Link Budget (dbm)
120
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20. 8-bit Timer/Counter2 with PWM and Asynchronous Operation
20.1
2549N–AVR–05/11
Overview
Timer/Counter2 is a general purpose, single channel, 8-bit Timer/Counter module. The main
features are:
•
•
•
•
•
•
•
A simplified block diagram of the 8-bit Timer/Counter is shown in
placement of I/O pins, see
ing I/O bits and I/O pins, are shown in bold. The device-specific I/O Register and bit locations
are listed in the
The Power Reduction Timer/Counter2 bit, PRTIM2, in
page 56
Figure 20-1. 8-bit Timer/Counter Block Diagram
Single Channel Counter
Clear Timer on Compare Match (Auto Reload)
Glitch-free, Phase Correct Pulse Width Modulator (PWM)
Frequency Generator
10-bit Clock Prescaler
Overflow and Compare Match Interrupt Sources (TOV2, OCF2A and OCF2B)
Allows Clocking from External 32kHz Watch Crystal Independent of the I/O Clock
Status flags
must be written to zero to enable Timer/Counter2 module.
Timer/Counter
TCCRnA
OCRnA
TCNTn
“Register Description” on page
OCRnB
=
=
Direction
“Pin Configurations” on page
Count
Clear
ASSRn
Synchronized Status flags
ATmega640/1280/1281/2560/2561
Control Logic
TOP
=
TCCRnB
asynchronous mode
Value
BOTTOM
Fixed
TOP
select (ASn)
clk
=
Tn
0
187.
Prescaler
Synchronization Unit
“PRR0 – Power Reduction Register 0” on
2. CPU accessible I/O Registers, includ-
OCnA
(Int.Req.)
OCnB
(Int.Req.)
Generation
Generation
Waveform
Waveform
Figure 17-12.
TOVn
(Int.Req.)
OCnA
OCnB
Oscillator
T/C
clk
For the actual
I/O
clk
clk
I/O
ASY
TOSC1
TOSC2
174
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