ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 22

• 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

22
ATmega128RFA1
Although the code for separate erase/write operations is more complex it is
recommended over the atomic operation. The erase operation can be omitted if the
target EEPROM byte already contains the value 255 (e.g. after a chip erase without the
EESAVE fuse set).
C Code Example
Assembly Code Example (Atomic Operation)
call EEPROM_write
…
void EEPROM_write(unsigned int uiAddress, unsigned char ucData)
{
}
EEPROM_atomic_write:
/* Wait for completion of previous erase/write */
while(EECR & (1<<EEPE))
/* Set up address */
EEAR = uiAddress;
EEDR = 255;
/* Write logical one to EEMPE and enable erase only*/
EECR = (1<<EEMPE) + (1<<EEPM0);
/* Start eeprom erase by setting EEPE */
EECR |= (1<<EEPE);
/* Wait for completion of erase */
while(EECR & (1<<EEPE))
/* Set up Data Registers */
EEDR = ucData;
/* Write logical one to EEMPE and enable write only */
EECR = (1<<EEMPE) + (2<<EEPM0);
/* Start eeprom write by setting EEPE */
EECR |= (1<<EEPE);
; Wait for completion of previous write
sbic EECR,EEPE
rjmp EEPROM_atomic_write
; Set up address (r18:r17) in address register
out EEARH, r18
out EEARL, r17
; Write data (r16) to Data Register
out EEDR,r16
; Write logical one to EEMPE
sbi EECR,EEMPE
; Start eeprom write by setting EEPE
sbi EECR,EEPE
ret
;
;
8266B-MCU Wireless-03/11