ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 375

• 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

24.6.4 UCSR0B – USART0 MSPIM Control and Status Register B
24.6.5 UCSR0C – USART0 MSPIM Control and Status Register C
8266B-MCU Wireless-03/11
• Bit 5 – UDRE0 - USART Data Register Empty
The UDRE0 Flag indicates if the transmit buffer (UDR0) is ready to receive new data. If
UDRE0 is one, the buffer is empty, and therefore ready to be written. The UDRE0 Flag
can generate a Data Register Empty interrupt (see description of the UDRIE0 bit).
UDRE0 is set after a reset to indicate that the Transmitter is ready.
• Bit 7 – RXCIE0 - RX Complete Interrupt Enable
Writing this bit to one enables interrupt on the RXC0 Flag. A USART Receive Complete
interrupt will be generated only if the RXCIE0 bit is written to one, the Global Interrupt
Flag in SREG is written to one and the RXC0 bit in UCSR0A is set.
• Bit 6 – TXCIE0 - TX Complete Interrupt Enable
Writing this bit to one enables interrupt on the TXC0 Flag. A USART Transmit Complete
interrupt will be generated only if the TXCIE0 bit is written to one, the Global Interrupt
Flag in SREG is written to one and the TXC0 bit in UCSR0A is set.
• Bit 5 – UDRIE0 - USART Data Register Empty Interrupt Enable
Writing this bit to one enables interrupt on the UDRE0 Flag. A Data Register Empty
interrupt will be generated only if the UDRIE0 bit is written to one, the Global Interrupt
Flag in SREG is written to one and the UDRE0 bit in UCSR0A is set.
• Bit 4 – RXEN0 - Receiver Enable
Writing this bit to one enables the USART Receiver in MSPIM mode. The Receiver will
override normal port operation for the RxD0 pin when enabled. Disabling the Receiver
will flush the receive buffer. Only enabling the receiver in MSPI mode (i.e. setting
RXEN0=1 and TXEN0=0) has no meaning since it is the transmitter that controls the
transfer clock and since only master mode is supported.
• Bit 3 – TXEN0 - Transmitter Enable
Writing this bit to one enables the USART Transmitter. The Transmitter will override
normal port operation for the TxD0 pin when enabled. The disabling of the Transmitter
(writing TXEN0 to zero) will not become effective until ongoing and pending
transmissions are completed, i.e., when the Transmit Shift Register and Transmit Buffer
Register do not contain data to be transmitted. When disabled, the Transmitter will no
longer override the TxD0 port.
• Bit 2 – UDORD0 - Data Order
Bit
NA ($C1)
Read/Write
Initial Value
Bit
NA ($C2)
Read/Write
Initial Value
RXCIE0
RW
7
0
7
TXCIE0
RW
6
6
0
UDRIE0
RW
5
5
1
RXEN0
RW
4
4
0
TXEN0
RW
3
3
0
ATmega128RFA1
UDORD0 UCPHA0 UCPOL0
RW
2
1
2
RW
1
1
1
RW
0
0
0
UCSR0B
UCSR0C
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