ATEVK1104 Atmel, ATEVK1104 Datasheet - Page 329

• Manufacturer Part Number: ATEVK1104
• Description: KIT DEV/EVAL FOR AVR32 AT32UC3A
• Manufacturer: Atmel
• Series: AVR®32r
• Type: MCUr

Specifications of ATEVK1104

• Contents: Evaluation Board, Software and Documentation
• Processor To Be Evaluated: AT32UC3A3
• Data Bus Width: 32 bit
• Interface Type: USB, SPI, USART
• Silicon Manufacturer: Atmel
• Core Architecture: AVR
• Core Sub-architecture: AVR UC3
• Silicon Core Number: AT32UC3A3256
• Silicon Family Name: AVR
• Kit Contents: Board CD Docs
• Rohs Compliant: Yes
• For Use With/related Products: AT32UC3A3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

26.7.5.7
26.7.6
26.7.6.1
32058J–AVR32–04/11
IrDA Mode
Protocol T = 1
IrDA Modulation
MAX_ITERATION is reached, the character is considered as correct, an acknowledge is sent on
the line and the ITERATION bit in the Channel Status Register is set.
When operating in ISO7816 protocol T = 1, the transmission is similar to an asynchronous for-
mat with only one stop bit. The parity is generated when transmitting and checked when
receiving. Parity error detection sets the PARE bit in the Channel Status Register (CSR).
The USART features an IrDA mode supplying half-duplex point-to-point wireless communica-
tion. It embeds the modulator and demodulator which allows a glueless connection to the
infrared transceivers, as shown in
are compliant with the IrDA specification version 1.1 and support data transfer speeds ranging
from 2.4 Kb/s to 115.2 Kb/s.
The USART IrDA mode is enabled by setting the MODE field in the Mode Register (MR) to the
value 0x8. The IrDA Filter Register (IFR) allows configuring the demodulator filter. The USART
transmitter and receiver operate in a normal asynchronous mode and all parameters are acces-
sible. Note that the modulator and the demodulator are activated.
Figure 26-33. Connection to IrDA Transceivers
The receiver and the transmitter must be enabled or disabled according to the direction of the
transmission to be managed.
For baud rates up to and including 115.2 Kbits/sec, the RZI modulation scheme is used. “0” is
represented by a light pulse of 3/16th of a bit time. Some examples of signal pulse duration are
shown in
Table 26-9.
Baud Rate
2.4 Kb/s
9.6 Kb/s
19.2 Kb/s
Table 26-9 on page
IrDA Pulse Duration
Transmitter
Receiver
USART
329.
Demodulator
Figure 26-33 on page
Modulator
Pulse Duration (3/16)
78.13 µs
19.53 µs
9.77 µs
RXD
TXD
329. The modulator and demodulator
RX
TX
Transceivers
AT32UC3A
IrDA
329