ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 389

• Manufacturer Part Number: ATMEGA128RFA1-ZU
• Description: IC AVR MCU 2.4GHZ XCEIVER 64QFN
• Manufacturer: Atmel
• Series: ATMEGAr

Specifications of ATMEGA128RFA1-ZU

• Frequency: 2.4GHz
• Data Rate - Maximum: 2Mbps
• Modulation Or Protocol: 802.15.4 Zigbee
• Applications: General Purpose
• Power - Output: 3.5dBm
• Sensitivity: -100dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 12.5mA
• Current - Transmitting: 14.5mA
• Data Interface: PCB, Surface Mount
• Memory Size: 128kB Flash, 4kB EEPROM, 16kB RAM
• Antenna Connector: PCB, Surface Mount
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-VFQFN, Exposed Pad
• Rf Ic Case Style: QFN
• No. Of Pins: 64
• Supply Voltage Range: 1.8V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Svhc: No SVHC (15-Dec-2010)
• Rohs Compliant: Yes
• Processor Series: ATMEGA128x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 16 KB
• Interface Type: JTAG
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 6
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVR128RFA1-EK1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8266A-MCU Wireless-12/09
This scheme is repeated until the last byte has been sent and the transfer is ended by
generating a STOP condition or a repeated START condition. A STOP condition is
generated by writing the following value to TWCR:
A REPEATED START condition is generated by writing the following value to TWCR:
After a REPEATED START condition (state 0x10) the 2-wire Serial Interface can
access the same Slave again, or a new Slave without transmitting a STOP condition.
Repeated START enables the Master to switch between Slaves, Master Transmitter
mode and Master Receiver mode without losing control of the bus.
Figure 25-12. Formats and States in the Master Transmitter Mode
Successfull
transmission
to a slave
receiver
Next transfer
started with a
repeated start
condition
Not acknowledge
received after the
slave address
Not acknowledge
received after a data
byte
Arbitration lost in slave
address or data byte
Arbitration lost and
addressed as slave
TWCR
Value
TWCR
Value
TWCR
Value
From master to slave
From slave to master
$08
S
TWINT
TWINT
TWINT
X
1
1
SLA
TWEA
TWEA
TWEA
X
X
1
W
MT
A or A
DATA
$18
$20
$38
$68
A
A
A
TWSTA
TWSTA
TWSTA
$78
0
0
0
Other master
Other master
n
continues
continues
P
$B0
DATA
A
TWSTO
TWSTO
TWSTO
X
0
1
Any number of data bytes
and their associated acknowledge bits
This number (contained in TWSR) corresponds
to a defined state of the Two-Wire Serial Bus. The
prescaler bits are zero or masked to zero
A or A
$28
$30
$38
To corresponding
states in slave mode
A
A
TWWC
TWWC
TWWC
ATmega128RFA1
X
X
1
Other master
$10
continues
P
R
P
S
TWEN
TWEN
TWEN
SLA
1
1
0
W
R
X
–
0
–
0
–
MR
TWIE
TWIE
TWIE
X
X
389