AT32UC3B1256-AUR Atmel, AT32UC3B1256-AUR Datasheet - Page 390

MCU AVR32 256K FLASH 48-TQFP

AT32UC3B1256-AUR

Manufacturer Part Number
AT32UC3B1256-AUR
Description
MCU AVR32 256K FLASH 48-TQFP
Manufacturer
Atmel
Series
AVR®32 UC3r
Datasheet

Specifications of AT32UC3B1256-AUR

Package / Case
48-TQFP, 48-VQFP
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Operating Temperature
-40°C ~ 85°C
Speed
60MHz
Number Of I /o
28
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
32K x 8
Program Memory Size
256KB (256K x 8)
Data Converters
A/D 6x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Connectivity
I²C, IrDA, SPI, SSC, UART/USART, USB
Core Size
32-Bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-

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32059J–12/2010
RXOUTI
FIFOCON
RXOUTI
FIFOCON
OUT
OUT
•Detailed description
(bank 0)
(bank 0)
DATA
DATA
Figure 22-20. Example of an OUT Endpoint with one Data Bank
Figure 22-21. Example of an OUT Endpoint with two Data Banks
The data is read, following the next flow:
• When the bank is full, RXOUTI and FIFOCON are set, what triggers an EPnINT interrupt if
• The user acknowledges the interrupt by writing a one to RXOUTIC in order to clear RXOUTI.
• The user can read the byte count of the current bank from BYCT to know how many bytes to
• The user reads the data from the current bank by using the USBFIFOnDATA register (see
• The user frees the bank and switches to the next bank (if any) by clearing FIFOCON.
If the endpoint uses several banks, the current one can be read while the following one is being
written by the host. Then, when the user clears FIFOCON, the following bank may already be
ready and RXOUTI is set immediately.
RXOUTE is one.
read, rather than polling RWALL.
”USB Pipe/Endpoint n FIFO Data Register (USBFIFOnDATA)” on page
expected data frame is read or the bank is empty (in which case RWALL is cleared and BYCT
reaches zero).
HW
ACK
ACK
HW
SW
read data from CPU
SW
BANK 0
OUT
NAK
read data from CPU
BANK 0
(bank 1)
DATA
SW
OUT
ACK
(bank 0)
DATA
HW
SW
HW
ACK
483), until all the
AT32UC3B
read data from CPU
read data from CPU
SW
SW
BANK 1
BANK 0
390

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