AT32UC3A4128 Atmel Corporation, AT32UC3A4128 Datasheet - Page 546

• Manufacturer Part Number: AT32UC3A4128
• Manufacturer: Atmel Corporation

Specifications of AT32UC3A4128

• Flash (kbytes): 128 Kbytes
• Pin Count: 100
• Max. Operating Frequency: 66 MHz
• Cpu: 32-bit AVR
• Hardware Qtouch Acquisition: No
• Usb Transceiver: 1
• Usb Speed: Hi-Speed
• Usb Interface: Device + OTG
• Spi: 6
• Twi (i2c): 2
• Uart: 4
• Sd / Emmc: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 128
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: Yes
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 3.0 to 3.6
• Operating Voltage (vcc): 3.0 to 3.6
• Fpu: No
• Mpu / Mmu: Yes / No
• Timers: 6
• Output Compare Channels: 6
• Input Capture Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

25.3
Figure 25-1. USART Block Diagram
32072G–11/2011
Block Diagram
Manager
Power
INTC
frame lengths with the time-out feature. The USART supports several operating modes, provid-
ing an interface to RS485, LIN, 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 differentiation through the parity bit. The hardware handshaking feature enables an
out-of-band flow control, automatically managing RTS and CTS pins. The Peripheral DMA Con-
troller connection enables memory transactions, and the USART supports chained buffer
management without processor intervention. Automatic echo, remote-, and local loopback -test
modes are also supported.
Interrupt
USART
DIV
CLK_USART
CLK_USART/DIV
USART
Peripheral bus
Channel
Peripheral DMA
Controller
Interface
User
Channel
Transmitter
BaudRate
Generator
Receiver
Modem
Signals
Control
Controller
I/O
RXD
DSR
DCD
RTS
TXD
CTS
DTR
CLK
RI
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