ATmega644R212 Atmel Corporation, ATmega644R212 Datasheet - Page 23
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: 23 of 198
- Download datasheet (5Mb)
Figure 6-12. Packet Structure - SRAM Write Access
Figure 6-13. Example SPI Sequence - SRAM Read Access of a 5 byte Data Package
Figure 6-14. Example SPI Sequence - SRAM Write Access of a 5 byte Data Package
8111C–MCU Wireless–09/09
MOSI
MISO
/SEL
SCLK
MOSI
MISO
/SEL
SCLK
MOSI
MISO
0
byte 1 (command byte)
1
PHY_STATUS
PHY_STATUS
0
PHY_STATUS
COMMAND
COMMAND
reserved[4:0]
On SRAM write access, one or more bytes of write data are transferred on MOSI starting with
the third byte of the access sequence (see
On SRAM read or write accesses do not attempt to read or write bytes beyond the SRAM buffer
size.
As long as /SEL = L, every subsequent byte read or byte write increments the address counter
of the Frame Buffer until the SRAM access is terminated by /SEL = H.
Figure 6-13 on page 23
SRAM access to read and write a data package of 5-byte length respectively.
Notes
• The SRAM access mode is not intended to be used as an alternative to the Frame Buffer
• If the SRAM access mode is used to read PSDU data, the Frame Buffer contains all PSDU
• Frame Buffer access violations are not indicated by a TRX_UR interrupt when using the
access modes (see
data except the frame length byte (PHR). The frame length information can be accessed only
using Frame Buffer access.
SRAM access mode, for further details refer to
109.
0
ADDRESS
ADDRESS
XX
XX
ADDRESS[6:0]
byte 2 (address)
XX
DATA 1
DATA 1
XX
XX
Section 6.2.2 “Frame Buffer Access Mode” on page
and
Figure 6-14 on page 23
byte 3 (data byte)
DATA[7:0]
XX
DATA 2
DATA 2
XX
XX
Figure 6-12 on page
DATA 3
DATA 3
XX
Section 9.3.3 “Interrupt Handling” on page
XX
illustrate an example SPI sequence of a
byte n-1 (data byte)
DATA[7:0]
XX
DATA 4
DATA 4
23).
XX
XX
AT86RF231
20).
byte n (data byte)
DATA 5
DATA 5
DATA[7:0]
XX
XX
XX
23
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: