Stephen S Chan

US Patent:

6574682, Jun 3, 2003

Filed:

Nov 23, 1999

Appl. No.:

09/448359

Inventors:

Stephen H. Chan - Los Altos Hills CA

Assignee:

ZiLOG, Inc. - San Jose CA

International Classification:

G06F 1300

US Classification:

710 22, 710 35, 710 52, 711113, 711118

Abstract:

The present invention provides for data flow enhancement in processor architectures having one or more caches by allowing DMA-type transfers to and from these caches. Specific examples allow such direct transfers between a peripheral logic device and the cache memory, or between either the main memory or a special memory and the cache memory. This is done by the processor reserving a portion of cache for the direct transfer, which is then carried out by a DMA-type controller. While this transfer is occurring, the processor is able to carry out other tasks and access the unreserved portion of cache in the normal manner. In the preferred embodiment, the transfer is performed by a cycle stealing technique. Once the transfer is complete, the reserved portion of the cache may be accessed by the processor. The size of the reservable portion may either be fixed or dynamically determined by the operating system based on factors such as task flow management and data transfer rates.

US Patent:

6933108, Aug 23, 2005

Filed:

Dec 8, 2000

Appl. No.:

09/733395

Inventors:

Mark A. Goldsmith - San Francisco CA, US
Stephen Chan - San Francisco CA, US

Assignee:

The Regents of the University of California - Oakland CA

International Classification:

C12Q001/70
C12Q001/68
C12P021/00
C12P019/34

US Classification:

435 5, 435 6, 435 691, 4353201, 435 721, 435 912, 4352351, 536 231, 536 234, 530300, 530350

Abstract:

Methods and compositions are provided for at least slowing the progression of a filovirus mediated disease condition in a host. In the subject methods, an effective amount of an agent that at least reduces the amount of folate receptor mediated filovirus cell entry is administered to the host. The subject methods find use in both the prevention and treatment of filovirus associated disease conditions, including Marburg and Ebola-Zaire virus mediated disease conditions.

US Patent:

6968487, Nov 22, 2005

Filed:

Feb 7, 2002

Appl. No.:

10/071262

Inventors:

Ian Bryant - Sunnyvale CA, US
Chung-Yuan Sun - San Jose CA, US
Sheng Feng - Cupertino CA, US
Stephen Chan - San Jose CA, US

Assignee:

Actel Corporation - Mountain View CA

International Classification:

G01R031/28
G06G007/48
H03K017/693

US Classification:

714726, 703 4, 716 16

Abstract:

A method of accessing the testing means in a Field Programmable Gate Array (“FPGA”) comprised of a plurality of functional groups (“FGs”) comprising: inputting a function netlist defining a user circuit; compiling said function netlist; and generating a logic Built-In Self Test (“BIST”) netlist; wherein said BIST netlist replaces all user registers with scan registers with a scan chain routed as the physical silicon scan chains.

US Patent:

7310760, Dec 18, 2007

Filed:

Dec 11, 2002

Appl. No.:

10/318281

Inventors:

Chung Sun - San Jose CA, US
Eddy Huang - San Jose CA, US
Stephen Chan - Alhambra CA, US

International Classification:

G01R 31/30
G06F 11/00

US Classification:

714745, 714742

Abstract:

An apparatus for generating a function activation signal to activate a function in an integrated circuit device comprises a power-on circuit receiving a power input and initializing and generating a test activation signal, a test circuit receiving the test activation signal and generating a test result signal, and a threshold decision circuit receiving the test result signal and generating the function activation signal. The test circuit models a function of the integrated circuit device and generates the test result signal when the power input has reached a sufficient voltage to perform the function of the integrated circuit device. The threshold decision circuit generates the function activation signal if the test result signal indicates the power input has reached a sufficient voltage to perform the function of the integrated circuit device.

US Patent:

7426667, Sep 16, 2008

Filed:

Aug 24, 2007

Appl. No.:

11/844581

Inventors:

Chung Sun - San Jose CA, US
Eddy Huang - San Jose CA, US
Stephen Chan - Alhambra CA, US

Assignee:

Actel Corporation - Mountain View CA

International Classification:

G01R 31/28

US Classification:

714731, 327142

Abstract:

An apparatus for generating a function activation signal to activate a function in an integrated circuit device comprises a power-on circuit receiving a power input and initializing and generating a test activation signal, a test circuit receiving the test activation signal and generating a test result signal, and a threshold decision circuit receiving the test result signal and generating the function activation signal. The test circuit models a function of the integrated circuit device and generates the test result signal when the power input has reached a sufficient voltage to perform the function of the integrated circuit device. The threshold decision circuit generates the function activation signal if the test result signal indicates the power input has reached a sufficient voltage to perform the function of the integrated circuit device.

US Patent:

7509478, Mar 24, 2009

Filed:

Sep 10, 2007

Appl. No.:

11/900100

Inventors:

Stephen H. Chan - Los Altos Hills CA, US

Assignee:

ZiLOG, Inc. - San Jose CA

International Classification:

G06F 12/12

US Classification:

711219

Abstract:

A system efficiently expands program memory without extensively modifying the remaining microcontroller architecture. An address bus of N+M bits addresses 2memory locations in a regular portion of program memory and additional memory locations in an expanded portion. An N-bit program counter increments through instructions stored only in the regular portion. Constants are stored in both the regular and expanded portions. An M-bit page-designator is prepended to an N-bit operand to generate a memory address of N+M bits. Program memory is expanded only when a load instruction retrieves constants from program memory. The page-designator is toggled when an N-bit operand rolls over upon incrementing by the load instruction. A block of constants straddling the boundary between the regular and expanded portions can be retrieved from program memory by executing only the load instruction. When program instructions are executed that do not retrieve constants, a fixed page-designator designates the regular portion.

US Patent:

7673194, Mar 2, 2010

Filed:

Aug 24, 2007

Appl. No.:

11/844569

Inventors:

Chung Sun - San Jose CA, US
Eddy Huang - San Jose CA, US
Stephen Chan - Alhambra CA, US

Assignee:

Actel Corporation - Mountain View CA

International Classification:

G11C 29/00

US Classification:

714718, 327143, 713 2

Abstract:

An apparatus for generating a function activation signal to activate a function in an integrated circuit device comprises a power-on circuit receiving a power input and initializing and generating a test activation signal, a test circuit receiving the test activation signal and generating a test result signal, and a threshold decision circuit receiving the test result signal and generating the function activation signal. The test circuit models a function of the integrated circuit device and generates the test result signal when the power input has reached a sufficient voltage to perform the function of the integrated circuit device. The threshold decision circuit generates the function activation signal if the test result signal indicates the power input has reached a sufficient voltage to perform the function of the integrated circuit device.

US Patent:

7803555, Sep 28, 2010

Filed:

Apr 11, 2005

Appl. No.:

11/104211

Inventors:

Mark A. Goldsmith - San Francisco CA, US
Stephen Chan - San Francisco CA, US

Assignee:

The J. David Gladstone Institutes - San Francisco CA

International Classification:

G01N 33/00
G01N 33/50
G01N 33/53

US Classification:

435 71, 435 72, 435 721

Abstract:

Methods and compositions are provided for at least slowing the progression of a filovirus mediated disease condition in a host. In the subject methods, an effective amount of an agent that at least reduces the amount of folate receptor mediated filovirus cell entry is administered to the host. The subject methods find use in both the prevention and treatment of filovirus associated disease conditions, including Marburg and Ebola-Zaire virus mediated disease conditions.