Invention Grant
US08131890B1 Circuit and method for increasing universal serial bus (USB) device endpoints
有权
增加通用串行总线(USB)设备端点的电路和方法
- Patent Title: Circuit and method for increasing universal serial bus (USB) device endpoints
- Patent Title (中): 增加通用串行总线(USB)设备端点的电路和方法
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Application No.: US12054315Application Date: 2008-03-24
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Publication No.: US08131890B1Publication Date: 2012-03-06
- Inventor: Pradeep Kumar Bajpai
- Applicant: Pradeep Kumar Bajpai
- Applicant Address: US CA San Jose
- Assignee: Cypress Semiconductor Corporation
- Current Assignee: Cypress Semiconductor Corporation
- Current Assignee Address: US CA San Jose
- Main IPC: G06F13/00
- IPC: G06F13/00 ; G06F3/00

Abstract:
A USB control circuit for increasing USB endpoints includes a token detection circuit. The USB control circuit is configured to receive a first logical endpoint (LEP) address and a USB token. The token detection circuit is configured to determine a direction of a USB data transfer in accordance with a USB token type. The USB control circuit includes an endpoint configuration and status control logic circuit in communication with the token detection circuit. The endpoint configuration and status control logic circuit is configured to control configuration and status information associated with each of a plurality of LEP input buffers and LEP output buffers. The USB control circuit is configured to generate a second LEP address in accordance with a combination of the first LEP address and the determined direction to increase a quantity of LEPs without increasing a quantity of physical endpoint buffers of a USB device.
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