MOBILE COMMUNICATION DEVICE HAVING INTEGRATED EMBEDDED FLASH AND SRAM MEMORY

Title:

MOBILE COMMUNICATION DEVICE HAVING INTEGRATED EMBEDDED FLASH AND SRAM MEMORY

Document Type and Number:

WIPO Patent Application WO2001045106

Kind Code:

A3

Abstract:

The flash and SRAM memory (112, 113) are embedded within an application specific integrated circuit (ASIC) to provide improved access times and also reduce over all power consumption of a mobile telephone employing the ASIC. The flash memory system (112) includes a flash memory array (130) configured to provide a set of individual flash macros and a flash memory controller (132) for accessing the flash macros. The flash memory controller includes a read while writing unit (144, 146) for writing to one of the flash macros while simultaneously reading from another of the flash macros. The flash memory controller also includes programmable wait state registers (138) and a password register (140) providing a separate password for different portions of the flash memory array. A memory swap unit (149) is provided for swapping high and low memory subsequent to completion of operations performed by the boot loader. Method and apparatus implementations are disclosed.

Inventors:

JHA SANJAY
SIMMONDS STEPHEN
ELHUSSEINI JALAL
YU NICHOLAS K
KHAN SAFI

Application Number:

PCT/US2000/034216

Publication Date:

January 10, 2002

Filing Date:

December 14, 2000

Export Citation:

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Assignee:

QUALCOMM INC (US)

International Classes:

G06F12/00; G06F21/00; G11C7/24; G11C16/10; G06F12/06; G11C16/22; G11C16/26; (IPC1-7): G11C16/10; G11C16/26; G11C16/22; G11C16/32

Domestic Patent References:

WO1999035650A1	1999-07-15
WO1999035649A1	1999-07-15
WO1998012704A2	1998-03-26
WO1999033057A1	1999-07-01

Foreign References:

FR2719939A1	1995-11-17
EP0905704A1	1999-03-31
EP0386935A2	1990-09-12
US5822244A	1998-10-13

Other References: