ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 346
ATMEGA128RFA1-ZU
Manufacturer Part Number
ATMEGA128RFA1-ZU
Description
IC AVR MCU 2.4GHZ XCEIVER 64QFN
Manufacturer
Atmel
Series
ATMEGAr
Datasheets
1.ATMEGA128-16AU.pdf
(385 pages)
2.ATAVR128RFA1-EK1.pdf
(13 pages)
3.ATAVR128RFA1-EK1.pdf
(555 pages)
4.ATMEGA128RFA1-ZU.pdf
(524 pages)
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATMEGA128RFA1-ZU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
Company:
Part Number:
ATMEGA128RFA1-ZUR
Manufacturer:
ON
Quantity:
56 000
- ATMEGA128-16AU PDF datasheet
- ATAVR128RFA1-EK1 PDF datasheet #2
- ATAVR128RFA1-EK1 PDF datasheet #3
- ATMEGA128RFA1-ZU PDF datasheet #4
- Current page: 346 of 555
- Download datasheet (6Mb)
23.6 Data Transmission – The USART Transmitter
23.6.1 Sending Frames with 5 to 8 Data Bit
346
ATmega128RFA1
More advanced initialization routines can be made that include frame format as
parameters, disable interrupts and so on. However, many applications use a fixed
setting of the baud and control registers, and for these types of applications the
initialization code can be placed directly in the main routine, or be combined with
initialization code for other I/O modules.
The USART transmitter is enabled by setting the Transmit Enable (TXEN) bit in the
UCSRnB register. When the transmitter is enabled, the normal port operation of the
TxDn pin is overridden by the USART and gives the function as the transmitter’s serial
output. The baud rate, mode of operation and frame format must be set up once before
doing any transmissions. If synchronous operation is used, the clock on the XCKn pin
will be overridden and used as transmission clock.
A data transmission is initiated by loading the transmit buffer with the data to be
transmitted. The CPU can load the transmit buffer by writing to the UDRn I/O location.
The buffered data in the transmit buffer will be moved to the shift register when the shift
register is ready to send a new frame. The shift register is loaded with new data if it is in
idle state (no ongoing transmission) or immediately after the last stop bit of the previous
frame is transmitted. When the shift register is loaded with new data, it will transfer one
complete frame at the rate given by the baud rate register, U2Xn bit or by XCKn
depending on mode of operation.
The following code examples show a simple USART transmit function based on polling
of the Data Register Empty Flag (UDREn). When using frames with less than eight bits,
the most significant bits written to the UDRn are ignored. The USART has to be
initialized before the function can be used. For the assembly code, the data to be sent
is assumed to be stored in register r16.
C Code Example
Note:
#define FOSC 8000000// Clock Speed
#define BAUD 9600
#define (MYUBRR FOSC/16/BAUD-1)
void main( void )
{...
USART_Init ( MYUBRR );
...} // main
void USART_Init( unsigned int ubrr){
/* Set baud rate */
UBRRnH = (unsigned char)(ubrr>>8);
UBRRnL = (unsigned char) ubrr;
/* Enable receiver and transmitter */
UCSRnB = (1<<RXEN)|(1<<TXEN);
/* Set frame format: 8data, 2stop bit */
UCSRnC = (1<<USBS)|(3<<UCSZ0);
} // USART_Init
1. See
(1)
"About Code Examples" on page 8
8266B-MCU Wireless-03/11
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