ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 150
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
- Current page: 150 of 198
- Download datasheet (5Mb)
11.6
11.6.1
Figure 11-12. Timing of RX_START and DIG2 for RX Frame Time Stamping
8111C–MCU Wireless–09/09
TRX_STATE
DIG2 (RX Frame Time Stamp)
IRQ
Interrupt latency
Number of Octets
Frame Content
RX Frame Time Stamping
Overview
To determine the exact timing of an incoming frame, e.g. for beaconing networks, the reception
of this frame can be signaled to the microcontroller via pin 10 (DIG2). The pin turns from L to H
after a detection of a valid PHR. When enabled, DIG2 is set to DIG2 = H at the same time as
IRQ_2 (RX_START), even if IRQ_2 is disabled. The pin remains high for the length of the frame
receive procedure, see
Note:
This function is enabled with register bit IRQ_2_EXT_EN (register 0x04) set. Pin 10 (DIG2)
could be connected to a timer capture unit of the microcontroller.
If this pin is not used for RX Frame Time Stamping it can be configured for Antenna Diversity.
Otherwise this pin is pulled-down to digital ground.
0
Timing figures refer to
RX_ON
Preamble
4
Figure 11-3 on page
128
12.4 “Digital Interface Timing Characteristics” on page
SFD
1
160
PHR
1
192
IRQ_2 (RX_START)
130.
t
IRQ
PSDU (250 kb/s)
m < 128
BUSY_RX
192 + m * 32
AT86RF231
157.
RX_ON
TRX_END
t
IRQ
Time [µs]
150
Related parts for ATmega644R212
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
INTERVAL AND WIPE/WASH WIPER CONTROL IC WITH DELAY
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Low-Voltage Voice-Switched IC for Hands-Free Operation
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
AM-FM Receiver IC U4255BM-M
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Monolithic Integrated Feature Phone Circuit
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
Multistandard Video-IF and Quasi Parallel Sound Processing
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
High-performance EE PLD
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
8-bit Flash Microcontroller
Manufacturer:
ATMEL Corporation
Datasheet:
Part Number:
Description:
2-Wire Serial EEPROM
Manufacturer:
ATMEL Corporation
Datasheet: