ATMEGA2561R231-MU Atmel, ATMEGA2561R231-MU Datasheet - Page 197

• Manufacturer Part Number: ATMEGA2561R231-MU
• Description: BUNDLE ATMEGA2561/RF231 QFN
• Manufacturer: Atmel

Specifications of ATMEGA2561R231-MU

• Frequency: 2.4GHz
• Modulation Or Protocol: 802.15.4 Zigbee, 6LoWPAN, RF4CE, SP100, WirelessHART™, ISM
• Data Interface: PCB, Surface Mount
• Memory Size: 256kB Flash, 4kB EEPROM, 8kB RAM
• Antenna Connector: PCB, Surface Mount
• Package / Case: 64-QFN, 32-QFN
• Processor Series: ATMEGA256x
• Core: AVR8
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 256 KB
• Data Ram Size: 8 KB
• Development Tools By Supplier: ATAVRRZ541, ATAVRRAVEN, ATAVRRZUSBSTICK, ATAVRISP2, ATAVRRZ201
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Power - Output: -
• Operating Temperature: -
• Applications: -
• Sensitivity: -
• Data Rate - Maximum: -
• Current - Transmitting: -
• Current - Receiving: -
• Lead Free Status / Rohs Status: Details

2549M–AVR–09/10
When the SPI is enabled, the data direction of the MOSI, MISO, SCK, and SS pins is overridden
according to
Functions” on page
Table 20-1.
Note:
The following code examples show how to initialize the SPI as a Master and how to perform a
simple transmission. DDR_SPI in the examples must be replaced by the actual Data Direction
Register controlling the SPI pins. DD_MOSI, DD_MISO and DD_SCK must be replaced by the
actual data direction bits for these pins. For example, if MOSI is placed on pin PB5, replace
DD_MOSI with DDB5 and DDR_SPI with DDRB.
MOSI
MISO
SCK
Pin
SS
1. See
direction of the user defined SPI pins.
Table
SPI Pin Overrides
“Alternate Functions of Port B” on page 79
Direction, Master SPI
User Defined
Input
User Defined
User Defined
20-1. For more details on automatic port overrides, refer to
75.
ATmega640/1280/1281/2560/2561
(1)
for a detailed description of how to define the
Direction, Slave SPI
Input
User Defined
Input
Input
“Alternate Port
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