ATMEGA128RFA1-ZU Atmel, ATMEGA128RFA1-ZU Datasheet - Page 161

• 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

12.5 Supply Voltage and Leakage Control
12.5.1 Power-chain
Figure 12-1. Power-chain connections
8266A-MCU Wireless-12/09
pow er_control
trx 24 _sleeps
llv reg_ok
bandgap
The radio transceiver has a separate reset signal. A radio transceiver reset is initiated
by setting bit TRXRST in register TRXPR. This bit is self-resetting.
The radio transceiver signal SLPTR can be controlled by the bit SLPTR in register
TRXPR and is used to set the radio transceiver into SLEEP mode (assuming
TRX_STATE is TRX_OFF). This bit has a multiple function, see section
GHz Transceiver" on page 29
For battery applications using deep sleep periods, the leakage current defines the
system life time. Due to the typical strong temperature dependency of the leakage
current, major contributors to the leakage budget are turned off:
• Analog and digital voltage regulator,
• Non-volatile memory (NVM),
• SRAM,
• Digital signal processor of the radio transceiver including AES engine.
If the CPU uses one of the sleep modes “power-down” or “power-save”, the above
mentioned blocks will be switched off by power switches. When the CPU wakes up, the
blocks are switched on again. There are some additional exceptions (internal voltage
regulator, SRAM, radio transceiver), see section
The supply voltage control is mainly hidden to the application, it is not necessary to
configure the supply voltage control. Nevertheless some configurations can be done in
order to get the maximum effect and the lowest sleep current, for details see section
"SRAM with Data Retention" on page
The following figure shows the major dependencies of the power-chain and how the
power switches are situated inside the chain.
Startup and Wakeup from deep sleep
After power-on reset (POR) or wakeup from deep sleep the power switches of the
blocks will be enabled one after another (power-chained) to decrease current peaks.
The blocks will be enabled in the following order:
1. Bandgap reference and voltage regulator,
2. Digital voltage regulator (DVREG) and low leakage voltage regulator (LLVREG),
3. SRAM block #0 (lower 4k bytes),
4. SRAM block #1,
5. SRAM block #2,
LLV R E G
D V R E G
drt_sw itch
S R A M # 0
pow erchain _ ok
for a detailed description of the radio transceiver.
163.
drt_sw itch
S R A M #3
"Power-chain" below
ATmega128RFA1
pow er_ sw itch
Transceiver
R adio
.
"Low-Power 2.4
pow er_sw itch
N V M
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