Atmel SAM4S Xplained Pro Starter and Evaluation Kit ATSAM4S-XPRO ATSAM4S-XPRO 数据表
产品代码
ATSAM4S-XPRO
SAM4S Series [DATASHEET]
Atmel-11100G-ATARM-SAM4S-Datasheet_27-May-14
1002
40.
USB Device Port (UDP)
40.1
Description
The USB Device Port (UDP) is compliant with the Universal Serial Bus (USB) 2.0 full-speed device specification.
Each endpoint can be configured in one of several USB transfer types. It can be associated with one or two banks
Each endpoint can be configured in one of several USB transfer types. It can be associated with one or two banks
of a dual-port RAM used to store the current data payload. If two banks are used, one DPR bank is read or written
by the processor, while the other is read or written by the USB device peripheral. This feature is mandatory for
isochronous endpoints. Thus the device maintains the maximum bandwidth (1 Mbyte/s) by working with endpoints
with two banks of DPR.
Note:
1. The Dual-Bank function provides two banks for an endpoint. This feature is used for ping-pong mode.
Suspend and resume are automatically detected by the USB device, which notifies the processor by raising an
interrupt. Depending on the product, an external signal can be used to send a wake up to the USB host controller.
40.2
Embedded Characteristics
USB 2.0 Full-speed Compliant, 12 Mbit/s
Embedded USB 2.0 Full-speed Transceiver
Integrated Pull-up on DDP
Integrated Pull-down on DDM
8 Endpoints
Embedded Dual-port RAM for Endpoints
Suspend/Resume Logic
Ping-pong Mode (2 Memory Banks) for Isochronous and Bulk Endpoints
Table 40-1.
USB Endpoint Description
Endpoint No.
Mnemonic
Dual-Bank
Max. Endpoint Size
Endpoint Type
0
EP0
No
64
Control/Bulk/Interrupt
1
EP1
Yes
64
Bulk/Iso/Interrupt
2
EP2
Yes
64
Bulk/Iso/Interrupt
3
EP3
No
64
Control/Bulk/Interrupt
4
EP4
Yes
512
Bulk/Iso/Interrupt
5
EP5
Yes
512
Bulk/Iso/Interrupt
6
EP6
Yes
64
Bulk/Iso/Interrupt
7
EP7
Yes
64
Bulk/Iso/Interrupt