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Read-only memory and its data reading method

A read-only memory and data reading technology, applied in the field of read-only memory and read-only memory, can solve problems such as power consumption, and achieve the effect of reducing power consumption

Active Publication Date: 2019-10-11
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since each output module 101 has to work every time the existing read-only memory reads data, that is, each output module 101 will generate power consumption

Method used

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  • Read-only memory and its data reading method
  • Read-only memory and its data reading method
  • Read-only memory and its data reading method

Examples

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Embodiment Construction

[0032] like figure 2 As shown, it is a structural schematic diagram of the read-only memory of the embodiment of the present invention; the read-only memory of the embodiment of the present invention is the read-only memory in the smart card chip, and the read-only memory of the embodiment of the present invention includes: a storage array, a multi-bit output module 1 and the central control logic circuit 2.

[0033] The storage array is formed by a plurality of storage units 3 , and each storage unit 3 stores one bit of data.

[0034] The output module 1 for each bit is used to output one bit of data; the output module 1 for each bit is one of the check bit output module 1 and the non-check bit output module 1 . figure 2 The output module 1 in is represented by output [0], [1], [N], [N+1], [N+2] and [M], etc., M represents the highest bit, and N represents 0 to M Any one of -2. Each said output module 1 includes a multiplexer 4 and a sense amplifier 5 respectively, and t...

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Abstract

The invention discloses a read-only memory which comprises a storage array, multiple bit output modules and a central control logic circuit. Each bit output module is a check bit output module or a non-check bit output module. The central control logic circuit is provided with check bit module control signals. The check bit module control signals are input to the check bit output modules, and values of the check bit module control signals are set according to the judgment whether check bits need to be output or not; when the read-only memory is in the working mode, the non-check bit output modules are in the working mode; when the read-only memory needs to output check bit data, the check bit control signals enable the check bit output modules to be in the working mode; when the read-only memory does not need to output check bit data, the check bit control signals enable the check bit output modules to be in the standby mode. The invention further discloses a data reading method of the read-only memory. The read-only memory can lower power consumption.

Description

technical field [0001] The invention relates to the field of semiconductor integrated circuits, in particular to a read-only memory (Read-Only Memory, ROM). The invention also relates to a data reading method of the read-only memory. Background technique [0002] Read-only memory is a type of memory that can only read data. In the wafer manufacturing process, the data provided by the customer is usually manufactured in the ROM circuit with a special mask (Mask). Once the data is written, it cannot be changed. [0003] Smart Card: A general term for a plastic card embedded with a microchip. The integrated circuit in the card includes a central processing unit (CPU), a programmable read-only memory (EEPROM0), a random access memory (RAM) and a card operating system COS (Chip Operating System) solidified in the read-only memory. [0004] The data stored in the read-only memory in the smart card is generally divided into check digit data and non-check digit data. [0005] li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11C17/18
Inventor 潘炯
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP