AT91SAM7X512-AU-999 Atmel, AT91SAM7X512-AU-999 Datasheet - Page 453
AT91SAM7X512-AU-999
Manufacturer Part Number
AT91SAM7X512-AU-999
Description
IC MCU ARM 512K HS FLASH 100LQFP
Manufacturer
Atmel
Series
AT91SAMr
Datasheet
1.AT91SAM7X512-AU-999.pdf
(687 pages)
Specifications of AT91SAM7X512-AU-999
Core Processor
ARM7
Core Size
16/32-Bit
Speed
55MHz
Connectivity
CAN, Ethernet, I²C, SPI, SSC, UART/USART, USB
Peripherals
Brown-out Detect/Reset, DMA, POR, PWM, WDT
Number Of I /o
62
Program Memory Size
512KB (512K x 8)
Program Memory Type
FLASH
Ram Size
128K x 8
Voltage - Supply (vcc/vdd)
1.65 V ~ 1.95 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
100-LQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
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34.5.1.2
34.5.1.3
6120H–ATARM–17-Feb-09
USB Bus Transactions
USB Transfer Event Definitions
Each transfer results in one or more transactions over the USB bus. There are three kinds of
transactions flowing across the bus in packets:
As indicated below, transfers are sequential events carried out on the USB bus.
Table 34-3.
Notes:
A status transaction is a special type of host-to-device transaction used only in a control transfer.
The control transfer must be performed using endpoints with no ping-pong attributes. According
to the control sequence (read or write), the USB device sends or receives a status transaction.
Control Transfers
Interrupt IN Transfer
(device toward host)
Interrupt OUT Transfer
(host toward device)
Isochronous IN Transfer
(device toward host)
Isochronous OUT Transfer
(host toward device)
Bulk IN Transfer
(device toward host)
Bulk OUT Transfer
(host toward device)
1. Setup Transaction
2. Data IN Transaction
3. Data OUT Transaction
1. Control transfer must use endpoints with no ping-pong attributes.
2. Isochronous transfers must use endpoints with ping-pong attributes.
3. Control transfers can be aborted using a stall handshake.
USB Transfer Events
(1) (3)
(2)
AT91SAM7X512/256/128 Preliminary
(2)
• Setup transaction > Data IN transactions > Status
• Setup transaction > Data OUT transactions > Status
• Setup transaction > Status IN transaction
• Data IN transaction > Data IN transaction
• Data OUT transaction > Data OUT transaction
• Data IN transaction > Data IN transaction
• Data OUT transaction > Data OUT transaction
• Data IN transaction > Data IN transaction
• Data OUT transaction > Data OUT transaction
OUT transaction
IN transaction
453
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