ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 364

• 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

23.10.11 UBRR1H – USART1 Baud Rate Register High Byte
364
ATmega128RFA1
Table 23-11 USBS1 Register Bits
• Bit 2:1 – UCSZ11:10 - Character Size
The UCSZ11:0 bits combined with the UCSZ12 bit in UCSR1B sets the number of data
bits (Character Size) in the frame that the Receiver and Transmitter use.
Table 23-12 UCSZ1 Register Bits
• Bit 0 – UCPOL1 - Clock Polarity
This bit is used for synchronous mode only. Write this bit to zero when asynchronous
mode is used. The UCPOL1 bit sets the relationship between data output change and
data input sample, and the synchronous clock (XCK1).
Table 23-13 UCPOL1 Register Bits
UBRR1 is a 12-bit register which contains the USART baud rate. The UBRR1H
contains the four most significant bits, and the UBRR1L 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 UBRR1L 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
NA ($CD)
Read/Write
Initial Value
Register Bits
USBS1
Register Bits
UCSZ11:10
Register Bits
UCPOL1
Res3
R
7
0
Res2
R
6
0
Res1
R
5
0
Value
Value
Value
0x00
0x01
0
1
2
3
4
5
6
7
0
1
Res0
R
4
0
UBRR11 UBRR10
Description
1-bit
2-bit
Description
5-bit
6-bit
7-bit
8-bit
Reserved
Reserved
Reserved
9-bit
Description
Rising XCKn Edge (Transmitted Data
Changed), Falling XCKn Edge (Received
Data Sampled)
Falling XCKn Edge (Transmitted Data
Changed), Rising XCKn Edge (Received
Data Sampled)
RW
3
0
RW
2
0
UBRR9
RW
1
0
8266A-MCU Wireless-12/09
UBRR8
RW
0
0
UBRR1H