ATAVRDISPLAYX Atmel, ATAVRDISPLAYX Datasheet - Page 209

• Manufacturer Part Number: ATAVRDISPLAYX
• Description: KIT EVAL XMEGA DISPLAY
• Manufacturer: Atmel

Specifications of ATAVRDISPLAYX

• Main Purpose: *
• Embedded: *
• Utilized Ic / Part: *
• Primary Attributes: *
• Secondary Attributes: *
• Silicon Manufacturer: Atmel
• Silicon Family Name: ATxmega
• Kit Contents: Board
• Features: Temperature Sensor, Mono Speaker Via Audio Amplifier
• Svhc: No SVHC (15-Dec-2010)
• Core Architecture: AVR
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8077H–AVR–12/09
Figure 19-5. Master Write Transaction
Given that the slave acknowledges the address, the master can start transmitting data (DATA)
and the slave will ACK or NACK (A/A) each byte. If no data packets are to be transmitted, the
master terminates the transaction by issuing a STOP condition (P) directly after the address
packet. There are no limitations to the number of data packets that can be transferred. If the
slave signal a NACK to the data, the master must assume that the slave cannot receive any
more data and terminate the transaction.
Figure 19-6
ing a START condition followed by an address packet with direction bit set to one (ADRESS+R).
The addressed slave must acknowledge the address for the master to be allowed to continue
the transaction.
Figure 19-6. Master Read Transaction
Given that the slave acknowledges the address, the master can start receiving data from the
slave. There are no limitations to the number of data packets that can be transferred. The slave
transmits the data while the master signals ACK or NACK after each data byte. The master ter-
minates the transfer with a NACK before issuing a STOP condition.
Figure 19-7
and write transactions separated by a Repeated START conditions (Sr).
Figure 19-7. Combined Transaction
S
S
S
ADDRESS
Address Packet #1
illustrates the Master Read transaction. The master initiates the transaction by issu-
illustrates a combined transaction. A combined transaction consists of several read
ADDRESS
ADDRESS
Address Packet
Address Packet
R/W
A
Direction
W
R
N Data Packets
DATA
A
A
A/A
Transaction
Transaction
DATA
DATA
Transaction
Data Packet
Data Packet
Sr
ADDRESS
Address Packet #2
N data packets
N data packets
A
A
R/W
A
DATA
DATA
Direction
M Data Packets
DATA
XMEGA A
A/A
A
A/A P
P
P
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