ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 111
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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8111C–MCU Wireless–09/09
Bit
+0x10
Read/Write
Reset Value
Register Description
AVREG_EXT
R/W
7
0
AVDD_OK
6
R
0
Register 0x10 (VREG_CTRL):
This register controls the use of the voltage regulators and indicates the status of these.
• Bit 7 - AVREG_EXT
If set this register bit disables the internal analog voltage regulator to apply an external regulated
1.8V supply for the analog building blocks.
Table 9-5.
• Bit 6 - AVDD_OK
This register bit indicates if the internal 1.8V regulated voltage supply AVDD has settled. The bit
is set to logic high, if AVREG_EXT = 1.
Table 9-6.
• Bit [5:4] - Reserved
• Bit 3 - DVREG_EXT
If set this register bit disables the internal digital voltage regulator to apply an external regulated
1.8V supply for the digital building blocks.
Table 9-7.
Register Bit
AVREG_EXT
Register Bit
AVDD_OK
Register Bit
DVREG_EXT
R/W
5
0
Reserved
Regulated Voltage Supply Control for Analog Building Blocks
Regulated Voltage Supply Control for Analog Building Blocks
Regulated Voltage Supply Control for Digital Building Blocks
R/W
4
0
Value
Value
Value
0
1
0
1
0
1
DVREG_EXT
R/W
Description
Internal voltage regulator enabled, analog section
Internal voltage regulator disabled, use external regulated 1.8V
supply voltage for the analog section
Description
Analog voltage regulator disabled or supply voltage not stable
Analog supply voltage has settled
Description
Internal voltage regulator enabled, digital section
Internal voltage regulator disabled, use external regulated 1.8V
supply voltage for the digital section
3
0
DVDD_OK
2
R
0
R/W
1
0
Reserved
AT86RF231
R/W
0
0
VREG_CTRL
111
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