Clock domain crossing serial interface, direct latching, and response codes

Patent metadata

Field	Value
Publication number	US-8996736-B2
Application number	US-201313950713-A
Country	US
Kind code	B2
Filing date	Jul 25, 2013
Priority date	Feb 1, 2013
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

Aspects of a clock domain crossing serial interface, direct latching over the serial interface, and response codes are described. In various embodiments, a data communication command received over a serial interface is identified, and an address received over the serial interface is resolved to access a register bank. In a write operation, depending upon whether the address falls within a direct latch address range of the register bank, data may be directly latched into a direct latch register of the register bank or into a first-in-first-out register. For both read and write operations, reference may be made to a status register of the serial interface to identify or mitigate error conditions, and wait times may be relied upon to account for a clock domain crossing. After each of the read and write operations, a response code including a status indictor may be communicated.

First claim

At least the following is claimed:

1. A method, comprising:
identifying a data communication command received over a serial interface;
resolving an address received over the serial interface to access a register bank;
communicating data over the serial interface;
decoding the address to obtain information associated with the address; and
based on the information associated with the address and at least some content of the data communication command, communicating a write e…

Assignees

• Broadcom Corp

Inventors

• Alarcon Veronica
• Nabhane Walid
• Fullerton Mark Norman
• Kothari Love
• Patel Ronak Subhas
• Hsieh Chih-Tsung
• Lee Hao-Zheng

Classifications

• G06F13/126 Primary

  Physics · mapped topic

• G01R19/003

  Physics · mapped topic

• G05F1/625

  Physics · mapped topic

• G06F11/3058

  Physics · mapped topic

• G01R31/36 Primary

  Physics · mapped topic