ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 152

• 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

11.7 Transceiver Crystal Oscillator
152
ATmega128RFA1
Figure 11-2. External Clock Drive Configuration
When this clock source is selected, start-up times are determined by the SUT Fuses as
shown in
Table 11-7. External Clock Frequency
Table 11-8. Start-up Times for the External Clock Selection
When applying an external clock, it is required to avoid sudden changes in the applied
clock frequency to ensure stable operation of the microcontroller unit (MCU). A variation
in frequency of more than 2% from one clock cycle to the next can lead to unpredictable
behavior. If changes of more than 2% are required, ensure that the MCU is kept in
Reset during the changes.
Note that the System Clock Prescaler can be used to implement run-time changes of
the internal clock frequency while still ensuring stable operation. Refer to section
"System Clock Prescaler" on page 153
The integrated crystal oscillator for the radio transceiver generates a low-jitter 16MHz
clock frequency. See section
the operation of this oscillator. The AVR core and the radio transceiver operate
synchronously on the same clock if this oscillator is selected. If the transceiver crystal
oscillator is selected as AVR core clock, it remains enabled even if the radio transceiver
is in SLEEP mode or its power reduction bit PRTRX24 is set.
Table 11-9. Transceiver Crystal Clock Operating Mode
external clock
Nominal Frequency
0 – 16 MHz
Power Conditions
BOD enabled
Fast rising power
Slowly rising power
Notes:
Table 11-8
1. All CKSEL fuse values have the same significance.
Frequency Range (MHz)
CLKI
VSS
below.
16
Start-up Time from Power-down
and Power-save
6 CK
6 CK
6 CK
"Crystal Oscillator (XOSC)" on page 81
Reserved
for details.
CKSEL3:0
0000
Additional Delay from
Reset
14 CK
14 CK + 4.0 ms
14 CK + 64 ms
CKSEL3:0
1111 - 0110
8266B-MCU Wireless-03/11
(1)
for details about
SUT1:0
00
01
10
11