ATmega1284PR231 Atmel Corporation, ATmega1284PR231 Datasheet - Page 119
ATmega1284PR231
Manufacturer Part Number
ATmega1284PR231
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT86RF231.pdf
(198 pages)
2.ATMEGA1284PR231.pdf
(380 pages)
3.ATMEGA1284PR231.pdf
(20 pages)
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
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8111C–MCU Wireless–09/09
Bit
+0x12
Read/Write
Initial Value
R/W
7
1
R/W
• Bit [2:0] - CLKM_CTRL
These register bits set clock rate of pin 17 (CLKM).
Table 9-14.
Register 0x12 (XOSC_CTRL):
The register XOSC_CTRL controls the operation of the crystal oscillator.
• Bit [7:4] - XTAL_MODE
These register bits set the operating mode of the crystal oscillator. For normal operation the
default value is set to XTAL_MODE = 0xF after reset. Using an external clock source it is recom-
mended to set XTAL_MODE = 0x4.
Table 9-15.
6
1
Register Bit
CLKM_CTRL
Register Bit
XTAL_MODE
XTAL_MODE
R/W
5
1
Clock Rate Setting at pin CLKM
Crystal Oscillator Operating Mode
Value
0x4
0xF
R/W
4
1
Value
Description
Internal crystal oscillator disabled, use external reference frequency
Internal crystal oscillator enabled
XOSC voltage regulator enabled
0
1
2
3
4
5
6
7
Description
No clock at pin 17 (CLKM), pin set to logic low
1 MHz
2 MHz
4 MHz
8 MHz
16 MHz
250 kHz
62.5 kHz (IEEE 802.15.4 symbol rate)
R/W
3
0
R/W
2
0
XTAL_TRIM
R/W
1
0
AT86RF231
R/W
0
0
XOSC_CTRL
119
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