AT91SAM9G45-CU-999 Atmel, AT91SAM9G45-CU-999 Datasheet - Page 843

• Manufacturer Part Number: AT91SAM9G45-CU-999
• Description: IC MCU ARM9 APMC 324TFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9G45-CU-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 400MHz
• Connectivity: EBI/EMI, Ethernet, I²C, IrDA, MMC, SPI, SSC, UART/USART, USB
• Peripherals: AC'97, DMA, I²S, LCD, POR, PWM, WDT
• Number Of I /o: 160
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: ROM
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 1.1 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 324-TFBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Supplier Unconfirmed

Figure 38-13. Data OUT Transfer for Endpoint with One Bank
843
USB Bus
Packets
RX_BK_RDY
(UDPHS_EPTSTAx)
FIFO (DPR)
Content
AT91SAM9G45
Token OUT
Host Sends Data Payload
Written by UDPHS Device
Data OUT 1
Data OUT 1
For OUT transfer, the bank will be automatically cleared by hardware when the application has
read all the bytes in the bank (the bank is empty).
Note: When a zero-length-packet is received, RX_BK_RDY bit in UDPHS_EPTSTAx is cleared
automatically by AUTO_VALID, and the application knows of the end of buffer by the presence
of the END_TR_IT.
Note: If the host sends a zero-length packet, and the endpoint is free, then the device sends an
ACK. No data is written in the endpoint, the RX_BY_RDY interrupt is generated, and the
BYTE_COUNT field in UDPHS_EPTSTAx is null.
– END_BUFFIT: Generate an interrupt when BUFF_COUNT in the
– END_TR_EN: End of transfer enable, the UDPHS device can put an end to the
– END_TR_IT: End of transfer interrupt enable, an interrupt is sent after the last USB
– CHANN_ENB: Run and stop at end of buffer.
UDPHS_DMASTATUSx register reaches 0.
current DMA transfer, in case of a short packet.
packet has been transferred by the DMA, if the USB transfer ended with a short
packet. (Beneficial when the receive size is unknown.)
Host Sends the Next Data Payload
ACK
Microcontroller Read
Set by Hardware
Microcontroller Transfers Data
Data OUT 1
Token OUT
Interrupt Pending
Data OUT 2
NAK
Cleared by Firmware,
Data Payload Written in FIFO
Token OUT
Host Resends the Next Data Payload
Written by UDPHS Device
Data OUT 2
Data OUT 2
6438F–ATARM–21-Jun-10
ACK