ATMEGA128RFA1-ZUR Atmel, ATMEGA128RFA1-ZUR Datasheet - Page 216

IC AVR MCU 2.4GHZ XCEIVER 64QFN

ATMEGA128RFA1-ZUR

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

Specifications of ATMEGA128RFA1-ZUR

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
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

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA128RFA1-ZUR
Manufacturer:
ON
Quantity:
56 000
Master Receiver Mode
216
ATmega128
In the Master Receiver Mode, a number of data bytes are received from a slave transmitter (see
Figure
of the following address packet determines whether Master Transmitter or Master Receiver
mode is to be entered. If SLA+W is transmitted, MT mode is entered, if SLA+R is transmitted,
MR mode is entered. All the status codes mentioned in this section assume that the prescaler
bits are zero or are masked to zero.
Figure 98. Data Transfer in Master Receiver Mode
A START condition is sent by writing the following value to TWCR:
TWEN must be written to one to enable the Two-wire Serial Interface, TWSTA must be written to
one to transmit a START condition and TWINT must be set to clear the TWINT flag. The TWI will
then test the Two-wire Serial Bus and generate a START condition as soon as the bus becomes
free. After a START condition has been transmitted, the TWINT flag is set by hardware, and the
status code in TWSR will be $08 (See
transmitted. This is done by writing SLA+R to TWDR. Thereafter the TWINT bit should be
cleared (by writing it to one) to continue the transfer. This is accomplished by writing the follow-
ing value to TWCR:
When SLA+R have been transmitted and an acknowledgment bit has been received, TWINT is
set again and a number of status codes in TWSR are possible. Possible status codes in Master
mode are $38, $40, or $48. The appropriate action to be taken for each of these status codes is
detailed in
is set high by hardware. This scheme is repeated until the last byte has been received. After the
last byte has been received, the MR should inform the ST by sending a NACK after the last
received data byte. 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 $10) the Two-wire Serial Interface can access the
same slave again, or a new slave without transmitting a STOP condition. Repeated START
TWCR
value
TWCR
value
TWCR
value
TWCR
value
SDA
SCL
98). In order to enter a Master mode, a START condition must be transmitted. The format
Table
TWINT
TWINT
TWINT
TWINT
1
1
1
1
97. Received data can be read from the TWDR Register when the TWINT flag
Device 1
RECEIVER
MASTER
TWEA
TWEA
TWEA
TWEA
X
X
X
X
TRANSMITTER
Device 2
TWSTA
TWSTA
TWSTA
TWSTA
SLAVE
1
0
0
1
Table
TWSTO
TWSTO
TWSTO
TWSTO
Device 3
0
0
1
0
88). In order to enter MR mode, SLA+R must be
TWWC
TWWC
TWWC
TWWC
X
X
X
X
........
TWEN
TWEN
TWEN
TWEN
Device n
1
1
1
1
V
CC
0
0
0
0
R1
TWIE
TWIE
TWIE
TWIE
R2
2467V–AVR–02/11
X
X
X
X

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