Memory system for portable telephone

• US 8,356,062 B2
• Filed: 05/07/2007
• Issued: 01/15/2013
• Est. Priority Date: 07/09/1999
• Status: Expired due to Term

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: Shinohara, Takayuki, Kimura, Masatoshi
• Primary Examiner(s): Ajibade Akonai, Olumide T
• Assistant Examiner(s): Peaches, Randy
• Application Number:
  US11/797,684
• Publication Number:
  US 20070207830A1
• Time in Patent Office: 2,080 Days
• Field of Search: 455/557, 365/185.04, 365/185.09
• US Class Current: 707/824
• CPC Class Codes: G06F 13/385 for adaptation of a particular data processing system to different peripheral devices
• CPC Class Codes: G06F 13/4068 Electrical coupling
• CPC Class Codes: G06F 16/13 File access structures, e.g. distributed indices arrangements of input from, or output to, record carriers G06F3/06
• CPC Class Codes: G06F 2207/7228 Random curve mapping, e.g. mapping to an isomorphous or projective curve
• CPC Class Codes: G06F 2213/3806 Mobile device
• CPC Class Codes: G06F 3/061 Improving I/O performance
• CPC Class Codes: G06F 3/0655 Vertical data movement, i.e. input-output transfer; data movement between one or more hosts and one or more storage devices
• CPC Class Codes: G06F 3/0679 Non-volatile semiconductor memory device, e.g. flash memory, one time programmable memory [OTP]
• CPC Class Codes: G06F 7/725 over elliptic curves
• CPC Class Codes: G06F 9/4403 Processor initialisation
• CPC Class Codes: H04L 2209/08 Randomization, e.g. dummy operations or using noise
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 9/003 for power analysis, e.g. differential power analysis [DPA] or simple power analysis [SPA]
• CPC Class Codes: H04L 9/3066 involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
• CPC Class Codes: H04M 1/026 Details of the structure or mounting of specific components
• CPC Class Codes: H04M 1/6505 storing speech in digital form
• CPC Class Codes: H04M 1/72403 with means for local support of applications that increase the functionality
• CPC Class Codes: H04M 2201/36 Memories
• CPC Class Codes: H04M 2250/14 including a card reading device

Abstract

A memory system is constituted of a file storage flash memory storing a control program required for a control portion and a large amount of data, and a random access memory storing a program used by the control portion and functioning as a buffer memory for received data. Thus, a memory system for a portable telephone capable of storing a large amount of received data at high-speed and allowing reading of the stored data at high-speed is provided.

Claims

1. A cellular phone capable of connecting to internet, comprising:

a base band processing unit;

a control unit;

a signal processing unit;

an audio unit;

a NAND type nonvolatile memory;

a volatile memory;

a display unit; and

a display control unit,

wherein the NAND type nonvolatile memory comprises a first area, a second area, each of which is for storing programs performed by the control unit, and a data area,

wherein a first program stored in the first area is for performing basic functions of the cellular phone, and a second program stored in the second area is for implementing additional functions of the cellular phone,

wherein in performing a power-on sequence of the cellular phone the control unit transfers the first program, which is stored in the first area, to the volatile memory,

wherein in starting to connect to the internet, the control unit transfers the second program, which is stored in the second area, to the volatile memory, performs the second program stored in the volatile memory, and stores data received from the internet to the data area after temporally storing the data in the volatile memory,

wherein the signal processing unit is configured for decoding the data stored in the data area as music data, and outputs the music data to the audio unit, wherein the received data from the internet includes image data, and

wherein the signal processing unit is configured for expanding the data stored in the data area as image data, and outputs the image data to the display control unit for displaying by the display unit.

2. A cellular phone comprising:

a signal sending/receiving unit;

a control unit for controlling a signal sending/receiving operation performed by the signal sending/receiving unit;

a signal processing unit;

an audio unit;

a random access memory;

a NAND type flash memory including a first area and a second area, both of which are used for storing programs performed by the control unit, and a third area for storing sending/receiving data;

a display unit; and

a display control unit,

wherein a first program stored in the first area is for performing basic functions of the cellular phone, and a second program stored in the second area is for implementing additional functions of the cellular phone,

wherein in performing a power-on sequence of the cellular phone, the control unit transfers a first program stored in the first area to the random access memory, and performs the first program transferred into the random access memory,

wherein in response to pressing a button of the cellular phone and receiving a control signal from outside via the signal sending/receiving unit, the control unit transfers the second program stored in the second area to the random access memory, performs the second program transferred into the random access memory, and stores received data from outside via the signal sending/receiving unit to the third area,

wherein the signal processing unit is configured for decoding the received data stored in the third area as music data, and outputs the music data to the audio unit,

wherein the received data from outside via the signal sending/receiving unit includes image data, and

wherein the signal processing unit is configured for decoding the data stored in the third area as the image data, and outputs the image data to the display control unit for displaying by the display unit.

3. A cellular phone comprising:

a control unit;

a signal processing unit;

an audio unit;

a NAND type flash memory;

a base band processing unit;

a volatile memory; and

a display unit,

wherein the NAND type flash memory comprises a program storing area and a data storing area,

wherein a first program stored in the program storing area is for performing basic functions of the cellular phone and a second program stored in the program storing area is for implementing additional function of the cellular phone,

wherein in performing a power-on sequence of the cellular phone, the control unit transfers the first program to the volatile memory, and executes the first program stored in the volatile memory,

wherein in starting to connect to the internet, the control unit transfers the second program to the volatile memory, and executes the second program stored in the volatile memory for receiving data from the internet via the base band processing unit and for storing the data to the data area, and

wherein the signal processing unit is configured for decoding the data read out from the data area as music data, and outputs the music data to the audio unit, and

wherein signal processing unit is configured for decoding the data read out from the data area as image data, and output the image data to the display unit.