AT91RM9200-CI-002 Atmel, AT91RM9200-CI-002 Datasheet - Page 596

• Manufacturer Part Number: AT91RM9200-CI-002
• Description: IC ARM9 MCU 256 BGA
• Manufacturer: Atmel
• Series: AT91SAMr

Specifications of AT91RM9200-CI-002

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 180MHz
• Connectivity: EBI/EMI, Ethernet, I²C, MMC, SPI, SSC, UART/USART, USB
• Peripherals: POR
• Number Of I /o: 122
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: ROM
• Ram Size: 48K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 1.95 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 256-BGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

35.2
Figure 35-1. USB Host Port Block Diagram
596
UDPCK
ASB
MCK
uhp_int
Block Diagram
AT91RM9200
Master Block
Slave Block
Registers
OHCI
HCI
HCI
Access to the USB host operational registers is achieved through the ASB bus interface. The
Open HCI host controller initializes master DMA transfers with the ASB bus as follows:
Memory access errors (abort, misalignment) lead to an “UnrecoverableError” indicated by the
corresponding flag in the host controller operational registers.
All of the ASB memory map is accessible to the USB host master DMA. Thus there is no need to
define a dedicated physical memory area to the USB host.
The USB root hub is integrated in the USB host. Several USB downstream ports are available.
The number of downstream ports can be determined by the software driver reading the root
hub’s operational registers. Device connection is automatically detected by the USB host port
logic.
Warning: a pull-down must be connected to DP on the board. Otherwise The USB host will per-
manently detect a device connection on this port.
USB physical transceivers are integrated in the product and driven by the root hub’s ports.
Over current protection on ports can be activated by the USB host controller. Atmel’s standard
product does not dedicate pads to external over current protection.
Control
• Fetches endpoint descriptors and transfer descriptors
• Access to endpoint data from system memory
• Access to the HC communication area
• Write status and retire transfer Descriptor
Data
List Processor
FIFO 64 x 8
Regsisters
ED & TD
Block
Root Hub
Host SIE
and
Hub Registers
OHCI Root
PORT S/M
PORT S/M
v2.0 Full-speed Transceiver
USB transceiver
USB transceiver
Embedded USB
1768I–ATARM–09-Jul-09
DM
DM
DP
DP