AT91SAM9261-CJ-999 Atmel, AT91SAM9261-CJ-999 Datasheet - Page 573

• Manufacturer Part Number: AT91SAM9261-CJ-999
• Description: IC MCU ARM9 ULTRA LP 217LFBGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91SAM9261-CJ-999

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 190MHz
• Connectivity: EBI/EMI, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: DMA, LCD, POR, PWM, WDT
• Number Of I /o: 96
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: ROM
• Ram Size: 192K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 217-LFBGA
• For Use With: AT91SAM9261-EK - KIT EVAL FOR AT91SAM926EJ-SAT91SAM-ICE - EMULATOR FOR AT91 ARM7/ARM9
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

36.4.2
6062M–ATARM–23-Mar-09
Host Controller Driver
The basic building blocks for communication across the interface are Endpoint Descriptors (ED,
4 double words) and Transfer Descriptors (TD, 4 or 8 double words). The host controller assigns
an Endpoint Descriptor to each endpoint in the system. A queue of Transfer Descriptors is linked
to the Endpoint Descriptor for the specific endpoint.
Figure 36-2. USB Host Communication Channels
Figure 36-3. USB Host Drivers
Device Enumeration
Open HCI
= Transfer Descriptor
Device Register
in Memory Space
Operational
Registers
Mini Driver
Mode
HCCA
Status
Event
Frame Int
Ratio
Control
Bulk
Host Controller Hardware
USB Driver
Host Controller Driver
User Application
Class Driver
Shared RAM
AT91SAM9261 Preliminary
Host Controller
Communications Area
Interrupt 31
Interrupt 0
Interrupt 1
Interrupt 2
HUB Driver
Done
. . .
. . .
. . .
= Endpoint Descriptor
Class Driver
User Space
Kernel Drivers
Hardware
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