ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 153
ATmega644R212
Manufacturer Part Number
ATmega644R212
Description
Manufacturer
Atmel Corporation
Specifications of ATmega644R212
Flash (kbytes)
64 Kbytes
Max. Operating Frequency
20 MHz
Max I/o Pins
32
Spi
3
Twi (i2c)
1
Uart
1
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Crypto Engine
AES
Sram (kbytes)
4
Eeprom (bytes)
2048
Operating Voltage (vcc)
1.8 to 3.6
Timers
3
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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11.7.2
8111C–MCU Wireless–09/09
Bit
+0x04
Read/Write
Reset Value
Register Description
PA_EXT_EN
R/W
7
0
IRQ_2_EXT_EN
R/W
6
0
Register 0x04 (TRX_CTRL_1):
The TRX_CTRL_1 register is a multi purpose register to control various operating modes and
settings of the radio transceiver.
• Bit 7 - PA_EXT_EN
Refer to
• Bit 6 - IRQ_2_EXT_EN
Refer to
• Bit 5 - TX_AUTO_CRC_ON
Refer to
• Bit 4 - RX_BL_CTRL
If this register bit is set the Frame Buffer Empty Indicator is enabled. After sending a Frame Buf-
fer read command, refer to
microcontroller that an access to the Frame Buffer is not possible since valid PSDU data are
missing.
Pin IRQ does not indicate any interrupts during this time.
Table 11-16. Frame Buffer Empty Indicator
• Bit [3:2] - SPI_CMD_MODE
Refer to
• Bit 1 - IRQ_MASK_MODE
Refer to
• Bit 0 - IRQ_POLARITY
Refer to
Register Bit
RX_BL_CTRL
TX_AUTO_CRC_ON
Section 11.5 “RX/TX Indicator” on page
Section 11.6 “RX Frame Time Stamping” on page
Section 8.2 “Frame Check Sequence (FCS)” on page
Section 6.3 “Radio Transceiver Status information” on page
Section 6.6 “Interrupt Logic” on page
Section 6.6 “Interrupt Logic” on page
R/W
5
1
RX_BL_CTRL
Value
0
1
R/W
4
0
Section 6.2 “SPI Protocol” on page
Description
Frame Buffer Empty Indicator disabled
Frame Buffer Empty Indicator enabled
3
SPI_CMD_MODE
R/W
0
29.
29.
147.
2
150.
IRQ_MASK_MODE
85.
19, pin 24 (IRQ) indicates to the
R/W
1
0
24.
IRQ_POLARITY
AT86RF231
R/W
0
0
TRX_CTRL_1
153
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