ATmega1281R231 Atmel Corporation, ATmega1281R231 Datasheet - Page 91
ATmega1281R231
Manufacturer Part Number
ATmega1281R231
Description
Manufacturer
Atmel Corporation
Specifications of ATmega1281R231
Flash (kbytes)
128 Kbytes
Max. Operating Frequency
16 MHz
Max I/o Pins
54
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)
8
Eeprom (bytes)
4096
Operating Voltage (vcc)
1.8 to 3.6
Timers
6
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
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2549N–AVR–05/11
• OC0B – Port G, Bit 5
OC0B, Output Compare match B output: The PG5 pin can serve as an external output for the
TImer/Counter0 Output Compare. The pin has to be configured as an output (DDG5 set) to
serve this function. The OC0B pin is also the output pin for the PWM mode timer function.
• TOSC1 – Port G, Bit 4
TOSC2, Timer Oscillator pin 1: When the AS2 bit in ASSR is set (one) to enable asynchronous
clocking of Timer/Counter2, pin PG4 is disconnected from the port, and becomes the input of the
inverting Oscillator amplifier. In this mode, a Crystal Oscillator is connected to this pin, and the
pin can not be used as an I/O pin.
• TOSC2 – Port G, Bit 3
TOSC2, Timer Oscillator pin 2: When the AS2 bit in ASSR is set (one) to enable asynchronous
clocking of Timer/Counter2, pin PG3 is disconnected from the port, and becomes the inverting
output of the Oscillator amplifier. In this mode, a Crystal Oscillator is connected to this pin, and
the pin can not be used as an I/O pin.
• ALE – Port G, Bit 2
ALE is the external data memory Address Latch Enable signal.
• RD – Port G, Bit 1
RD is the external data memory read control strobe.
• WR – Port G, Bit 0
WR is the external data memory write control strobe.
Table 13-22 on page 91
the overriding signals shown in
Table 13-22. Overriding Signals for Alternate Functions in PG5:PG4
Signal Name
DIEOE
DIEOV
PUOE
DDOE
DDOV
PUOV
PVOE
PVOV
PTOE
AIO
DI
and
—
–
–
–
–
–
–
–
–
–
–
–
Table 13-23 on page 92
Figure 13-5 on page
ATmega640/1280/1281/2560/2561
—
–
–
–
–
–
–
–
–
–
–
–
76.
relates the alternate functions of Port G to
OC0B Enable
PG5/OC0B
OC0B
–
–
–
–
–
–
–
–
–
T/C2 OSC INPUT
PG4/TOSC1
EXCLK
AS2
AS2
AS2
0
0
0
0
–
–
91
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