Patents by Inventor Tsung D. Mok

Tsung D. Mok has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6032248
    Abstract: A microcontroller having a special function register to internally select between internal memory and external memory on the fly. Two data pointers in conjunction with the special function register result in four effective quick reference locations. The internal memory consists of one memory module having its array subdivided into a data memory store and a code memory store, and having a bank of pass devices to selectively isolate the code memory store from the data memory store. The present memory can further support concurrent writing to the data memory store while reading from the code memory store. This is done through one of two memory embodiments. In a first memory embodiment two y-decoders are used; a first y-decoder adjacent the code memory store and a second y-decoder adjacent the data memory store. When a simultaneous read/write instruction is started, the outputs from the second y-decoder and an x-decoder are latched.
    Type: Grant
    Filed: April 29, 1998
    Date of Patent: February 29, 2000
    Assignee: Atmel Corporation
    Inventors: Duncan Curry, Arthur Y. Yu, Tsung D. Mok
  • Patent number: 5493534
    Abstract: A single chip microcontroller has a plurality of I/O ports which communicate directly and indirectly with an electrically programmable and erasable read only memory array used as a program store circuit. The PEROM array provides for fast erasing and reprogramming, either directly from a local host or remotely. The plurality of ports provides alternative access routes to the memory store, thereby providing a capability for verifying microinstructions immediately after writing them, one at a time. A random access memory, RAM, is also provided. The PEROM array is like hard disk storage in a microcontroller. A low voltage power supply has a connected charge pump which provides a programming and erase high voltage for the PEROM array.
    Type: Grant
    Filed: May 17, 1995
    Date of Patent: February 20, 1996
    Assignee: Atmel Corporation
    Inventor: Tsung D. Mok