ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 160

• 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

12.3 Power Reduction Register
12.4 Minimizing Power Consumption
12.4.1 Analog to Digital Converter
12.4.2 Analog Comparator
12.4.3 Brown-out Detector
12.4.4 Internal Voltage Reference
160
ATmega128RFA1
The Power Reduction Register (PRR), see
page
Reduction Register 2" on page
peripherals to reduce power consumption. The current state of the peripheral is frozen
and the I/O registers can not be read or written. Resources used by the peripheral when
stopping the clock will remain occupied. Hence the peripheral unit should in most cases
be disabled before stopping the clock. Waking up a module, which is done by clearing
the bit in PRR, puts the module in the same state as before the shutdown. Exceptions
are the SRAM blocks and the radio transceiver. The SRAM is shut down by a DRT
switch and the radio transceiver is in reset state if its respective power reduction bit is
set.
Module shutdown can be used in Idle mode and Active mode to significantly reduce the
overall power consumption. See chapter
examples. In all other sleep modes, the clock is already stopped.
There are several issues to consider when trying minimizing the power consumption in
an AVR controlled system. In general, sleep modes should be used as much as
possible, and the sleep mode should be selected so that as few as possible of the
device’s functions are operating. All functions not needed should be disabled. In
particular, the following modules may need special consideration when trying to achieve
the lowest possible power consumption.
If enabled, the ADC will be enabled in all sleep modes. To save power, the ADC should
be disabled before entering any sleep mode. Refer to chapter
Converter" on page 411
When entering Idle mode, the Analog Comparator should be disabled if not used. When
entering ADC Noise Reduction mode the Analog Comparator should also be disabled.
In other sleep modes, the Analog Comparator is automatically disabled. However, if the
Analog Comparator is set up to use the Internal Voltage Reference as input, the Analog
Comparator should be disabled in all sleep modes. Otherwise, the Internal Voltage
Reference will be enabled, independent of sleep mode. Refer to
Comparator" on page 408
If the Brown-out Detector is enabled by the BODLEVEL Fuses, it will be disabled in
Deep-sleep mode. Refer to
configure the Brown-out Detector. It is recommended to enable the Brown-out Detector.
The Internal Voltage Reference will be enabled when needed by the Brown-out
Detection, the Analog Comparator or the ADC. If these modules are disabled as
described in the sections above, the internal voltage reference will be disabled and not
consume power. When turned on again, the user must allow the reference to start up
before the output is used. If the reference is kept on in sleep mode, the output can be
168,
"PRR1 – Power Reduction Register 1" on page 169
for details on ADC operation.
for details on how to configure the Analog Comparator.
"Brown-out Detection" on page 179
170, provide a method to stop the clock to individual
"Typical Characteristics" on page 515
"PRR0 – Power Reduction Register0" on
"ADC – Analog to Digital
for details on how to
and
8266B-MCU Wireless-03/11
"PRR2 – Power
"AC – Analog
for