ATAVRZRAVEN Atmel, ATAVRZRAVEN Datasheet - Page 5

• Manufacturer Part Number: ATAVRZRAVEN
• Description: Development Tools & Eval/Demo Boards
• Manufacturer: Atmel

Specifications of ATAVRZRAVEN

• Silicon Manufacturer: Atmel
• Silicon Core Number: ATmega1280, ATmega1280R231 And ATmega128RZAV
• Kit Contents: 2x AVR Raven Boards, USB Stick, PC Software
• Silicon Family Name: AVR
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

3.7 Serial EEPROM
3.8 Real Time Clock
3.9 NTC
3.10 Power Supply
8117C-AVR-03/08
A 2-Kbits Atmel Serial EEPROM (AT24C02B) is connected to the ATmega1284P’s
two-wire interface (TWI). This storage is write protected by hardware and can only be
read. The storage contains important configuration and calibration data that should
not be unintentionally overwritten. Information such as a unique EUI 64-bit address
can be found her-in. A rich set of access functions and the parameter map is given in
the RZRAVEN firmware documentation.
Separate 32768 Hz clock crystals are connected to the ATmega3290P’s and the
ATmega1284P’s asynchronous timer interfaces. This allows an application to
implement a real time clock (RTC) to keep track of time when sleep modes are used
to reduce the power consumption. This is especially important for battery-operated
nodes.
A NTC is connected to the ATmega3290P’s Analog to Digital Converter (ADC)
channel 4. This NTC can be used to measure the temperature in the surroundings of
the AVRRAVEN. The NTC can be found below the joystick, close to J401. The JTAG
interface must be disabled when using the temperature sensor.
The AVRRAVEN can be powered either from batteries or an external 5 to 12 Volts
DC source. The power source is selected by the position of the jumper located
immediately to the right of the LCD (See the figure below for a reference). Polarity
protection is provided when using an external power source.
AVR2016
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