AT32UC3B1128 Atmel Corporation, AT32UC3B1128 Datasheet - Page 319

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AT32UC3B1128

Manufacturer Part Number
AT32UC3B1128
Description
Manufacturer
Atmel Corporation

Specifications of AT32UC3B1128

Flash (kbytes)
128 Kbytes
Pin Count
48
Max. Operating Frequency
60 MHz
Cpu
32-bit AVR
# Of Touch Channels
32
Hardware Qtouch Acquisition
No
Max I/o Pins
28
Ext Interrupts
28
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
3
Twi (i2c)
1
Uart
2
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
6
Adc Resolution (bits)
10
Adc Speed (ksps)
384
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
32
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
3.0-3.6 or (1.65-1.95+3.0-3.6)
Operating Voltage (vcc)
3.0-3.6 or (1.65-1.95+3.0-3.6)
Fpu
No
Mpu / Mmu
Yes / No
Timers
10
Output Compare Channels
16
Input Capture Channels
6
Pwm Channels
13
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes

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21.6.6.1
32059L–AVR32–01/2012
IrDA Modulation
Figure 21-32. Connection to IrDA Transceivers
The receiver and the transmitter must be exclusively enabled or disabled, according to the direc-
tion of the transmission. To receive IrDA signals, the following needs to be done:
The RZI modulation scheme is used, where a zero is represented by a light pulse one 3/16
a bit period, and no pulse to represent a one. Some examples of signal pulse duration are
shown in
Table 21-10. IrDA Pulse Duration
Figure 21-33
Baud Rate
2.4 Kbit/s
9.6 Kbit/s
19.2 Kbit/s
38.4 Kbit/s
57.6 Kbit/s
115.2 Kbit/s
• Disable TX and enable RX.
• Configure the TXD pin as an I/O, outputting zero to avoid LED activation. Disable the internal
• Receive data.
pull-up for improved power consumption.
Table
shows an example of character transmission.
Transmitter
21-10.
Receiver
USART
Demodulator
Modulator
Pulse Duration (3/16)
78.13 µs
19.53 µs
9.77 µs
4.88 µs
3.26 µs
1.63 µs
RXD
TXD
RX
TX
Transceivers
IrDA
th
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