Mark J Whitaker

US Patent:

20120007720, Jan 12, 2012

Filed:

Jul 9, 2010

Appl. No.:

12/833817

Inventors:

Mark R. Whitaker - Colorado Springs CO, US

Assignee:

RAMTRON INTERNATIONAL CORPORATION - Colorado Springs CO

International Classification:

H04Q 5/22
G11C 19/00

US Classification:

340 1051, 377 78

Abstract:

A serial interface includes a select node, a clock node, a first bidirectional data port, a second bidirectional data port, and shift register circuitry coupled to both data ports such that a leading edge and a falling edge of a clock signal associated with the clock node are used to shift or transfer data.

US Patent:

20120007721, Jan 12, 2012

Filed:

Jul 9, 2010

Appl. No.:

12/833836

Inventors:

Mark R. Whitaker - Colorado Springs CO, US
Doug D. Moran - Carlsbad CA, US
Robert John Clarke - Heathpool, AU
Alexander Antony John Roach - Kent Town, AU

Assignee:

Ramtron International Corporation - Colorado Springs CO

International Classification:

H04Q 5/22

US Classification:

340 1051

Abstract:

A fast block write command includes providing an RFID tag having a memory, and using a stored address pointer to point to a known address in the memory, wherein the stored address pointer points to a starting address at a known safe block in the memory. The method is performed without an intermediate buffer. The received data is written to the known safe block and a cyclic redundancy check is computed on the received data. If the cyclic redundancy check matches, the received data is retained and the stored address pointer is updated. If the cyclic redundancy check does not match, the stored address pointer is kept for a future write operation. Further block writes can be disallowed after an initial successful block write.

US Patent:

20120007722, Jan 12, 2012

Filed:

Jul 9, 2010

Appl. No.:

12/833845

Inventors:

Mark R. Whitaker - Colorado Springs CO, US
Danny Lee Secrest - Colorado Springs CO, US

Assignee:

RAMTRON INTERNATIONAL CORPORATION - Colorado Springs CO

International Classification:

H04Q 5/22

US Classification:

340 1051

Abstract:

A method of operating a memory in an RFID application includes locating a memory pointer at a fixed read/writeable memory location in the memory, determining a range of a pedigree buffer, initializing the memory pointer to a lowest value in the range, providing a second memory location that serves as a trigger address for an indirect write, and writing to a next location in the pedigree buffer by directing write data to the trigger address, which is then automatically written at a location pointed to by the memory pointer.

US Patent:

20120007723, Jan 12, 2012

Filed:

Jul 9, 2010

Appl. No.:

12/833861

Inventors:

Mark R. Whitaker - Colorado Springs CO, US
Leslie Joseph Marentette - Newmarket, CA

Assignee:

Ramtron International Corporation - Colorado Springs CO

International Classification:

H04Q 5/22

US Classification:

340 1051

Abstract:

A memory circuit includes a memory, a memory access control circuit coupled to the memory, an RFID interface coupled to the memory access control circuit, a secondary interface coupled to the memory access control circuit, and an interrupt manager coupled to the memory access control circuit, the RFID interface, and the secondary interface.