ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 360

• 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

23.10.5 UBRR0H – USART0 Baud Rate Register High Byte
23.10.6 UBRR0L – USART0 Baud Rate Register Low Byte
23.10.7 UDR1 – USART1 I/O Data Register
360
ATmega128RFA1
UBRR0 is a 12-bit register which contains the USART baud rate. The UBRR0H
contains the four most significant bits, and the UBRR0L contains the eight least
significant bits of the USART baud rate. Ongoing transmissions by the Transmitter and
Receiver will be corrupted if the baud rate is changed. Writing UBRR0L will trigger an
immediate update of the baud rate prescaler.
• Bit 7:4 – Res3:0 - Reserved Bit
This bit is reserved for future use. A read access always will return zero. A write access
does not modify the content.
• Bit 3:0 – UBRR11:8 - USART Baud Rate Register
These bits represent bits [11:8] of the Baud Rate Register. Sample values for
commonly used clock frequencies can be found in section "Examples of Baud Rate
Setting".
UBRR0 is a 12-bit register which contains the USART baud rate. The UBRR0H
contains the four most significant bits, and the UBRR0L contains the eight least
significant bits of the USART baud rate. Ongoing transmissions by the Transmitter and
Receiver will be corrupted if the baud rate is changed. Writing UBRR0L will trigger an
immediate update of the baud rate prescaler.
• Bit 7:0 – UBRR7:0 - USART Baud Rate Register
These bits represent bits [7:0] of the Baud Rate Register. Sample values for commonly
used clock frequencies can be found in section "Examples of Baud Rate Setting".
The USART Transmit Data Buffer Register and USART Receive Data Buffer Registers
share the same I/O address referred to as USART Data Register or UDR1. The
Transmit Data Buffer Register (TXB) will be the destination for data written to the UDR1
Register location. Reading the UDR1 Register location will return the contents of the
Bit
NA ($C5)
Read/Write
Initial Value
Bit
NA ($C4)
Read/Write
Initial Value
Bit
NA ($CE)
Read/Write
Initial Value
UBRR7
RW
Res3
RW
7
0
R
7
0
7
0
RW
UBRR6
6
0
Res2
RW
R
6
0
6
0
RW
5
0
UBRR5
Res1
RW
R
5
0
5
0
RW
4
0
UDR17:10
UBRR4
Res0
RW
R
4
0
4
0
RW
3
0
UBRR11 UBRR10
UBRR3
RW
RW
3
0
3
0
RW
2
0
UBRR2
RW
RW
2
0
2
0
RW
1
0
UBRR9
UBRR1
RW
RW
RW
1
0
1
0
0
0
8266A-MCU Wireless-12/09
UBRR8
UBRR0
RW
RW
0
0
0
0
UDR1
UBRR0H
UBRR0L