AT32UC3B1256 Atmel Corporation, AT32UC3B1256 Datasheet - Page 297

• Manufacturer Part Number: AT32UC3B1256
• Manufacturer: Atmel Corporation

Specifications of AT32UC3B1256

• Flash (kbytes): 256 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

21. Universal Synchronous Asynchronous Receiver Transmitter (USART)
21.1
21.2
32059L–AVR32–01/2012
Features
Overview
Rev: 4.0.0.6
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The Universal Synchronous Asynchronous Receiver Transceiver (USART) provides a full
duplex, universal, synchronous/asynchronous serial link. Data frame format is widely configu-
rable, including basic length, parity, and stop bit settings, maximizing standards support. The
receiver implements parity-, framing-, and overrun error detection, and can handle un-fixed
frame lengths with the time-out feature. The USART supports several operating modes, provid-
ing an interface to RS485 and SPI buses, with ISO7816 T=0 and T=1 smart card slots, infrared
transceivers, and modem port connections. Communication with slow and remote devices is
eased by the timeguard. Duplex multidrop communication is supported by address and data dif-
ferentiation through the parity bit. The hardware handshaking feature enables an out-of-band
flow control, automatically managing RTS and CTS pins. The Peripheral DMA Controller con-
nection enables memory transactions, and the USART supports chained buffer management
without processor intervention. Automatic echo, remote-, and local loopback -test modes are
also supported.
Configurable baud rate generator
5- to 9-bit full-duplex, synchronous and asynchronous, serial communication
RS485 with line driver control
ISO7816, T=0 and T=1 protocols for Interfacing with smart cards
IrDA modulation and demodulation
SPI Mode
Test Modes
Supports two Peripheral DMA Controller channels
– 1, 1.5, or 2 stop bits in asynchronous mode, and 1 or 2 in synchronous mode
– Parity generation and error detection
– Framing- and overrun error detection
– MSB- or LSB-first
– Optional break generation and detection
– Receiver frequency over-sampling by 8 or 16 times
– Optional RTS-CTS hardware handshaking
– Optional DTR-DSR-DCD-RI modem signal management
– Receiver Time-out and transmitter Timeguard
– Optional Multidrop mode with address generation and detection
– , NACK handling, and customizable error counter
– Communication at up to 115.2Kbit/s
– Master or slave
– Configurable serial clock phase and polarity
– CLK SPI serial clock frequency up to a quarter of the CLK_USART internal clock frequency
– Automatic echo, remote- and local loopback
– Buffer transfers without processor intervention
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