Read and write interface communications protocol for digital-to-analog signal converter with non-volatile memory

An analog-to-analog converter and non-volatile technology, applied in the field of multi-channel DAC, can solve the problems of inconvenience of mixed-signal devices, increase manufacturing time and cost, and achieve the effects of shortening interface communication time and reducing command structure.

Active Publication Date: 2010-11-17
MICROCHIP TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Having to program up to eight different address masks into an otherwise identical mixed-signal device increases manufacturing time and cost, and results in as many as eight different parts having to be stocked and shipped
Also, having mixed-signal devices with non-field programmable addresses can become inconvenient in some applications

Method used

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  • Read and write interface communications protocol for digital-to-analog signal converter with non-volatile memory
  • Read and write interface communications protocol for digital-to-analog signal converter with non-volatile memory
  • Read and write interface communications protocol for digital-to-analog signal converter with non-volatile memory

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Embodiment Construction

[0031] Referring now to the drawings, the details of specific example embodiments are schematically illustrated. The same elements in the drawings will be represented by the same reference numerals, and similar elements will be represented by the same reference numerals with different lowercase letter suffixes.

[0032] See figure 1 , Depicts a schematic block diagram of a device with a single digital-to-analog conversion (DAC) capability and non-volatile memory according to a specific example embodiment of the present invention. The device (generally denoted by the reference numeral 100) may include a serial interface and address logic 102, an input register 104, a DAC register 106, a digital / analog converter (DAC) 108, a power-off control 110, an analog amplifier 112, a non-volatile The sexual memory 114, the charge pump 116, and the power-on reset (POR) circuit 118.

[0033] The non-volatile memory 114 may be (but is not limited to) electrically erasable and programmable read o...

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Abstract

A mixed signal integrated circuit device, e.g., digital-to-analog converter (DAC), has a serial interface communication protocol that accesses volatile and / or non-volatile memory and allows a preprogrammed output voltage whenever the mixed signal device is powered- up. However, unlike conventional DACs, DACs with non- volatile memory may need special interface communication protocols for effective operation of the DAC and communications between a system master controller unit (MCU). Interface communications protocols that do not violate standard serial bus communications protocols are provided for communicating between the volatile and non- volatile memories of the DAC so that the MCU may access the DACs memories (non-volatile and / or volatile memories). The mixed signal integrated circuit device has a user programmable address.

Description

Technical field [0001] The present invention relates to a digital-to-analog converter (DAC) that stores configuration and address information and input data in a non-volatile memory; and more specifically to a digital-to-analog converter (DAC) having a non-volatile memory and using a conventional serial interface (such as , I 2 C, SPI, USB, SCIO, UNI / O, etc.) serial communication protocol multi-channel DAC. Background technique [0002] Current technology DAC devices store configuration information and input data in volatile memory. When operating power is removed from the DAC device and the associated volatile memory, the configuration information and input data stored in the volatile memory are lost. For example, the DAC device can be used to output a programmable analog voltage. The programming bits (for example, the digital representation of the analog voltage) are stored in the volatile DAC register, thereby releasing their contents when the power is off. After the initia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M1/66
CPCH03M1/66
Inventor 托马斯·尤博克·李扬·约纳菲利普·吉梅尔蒂姆·舍曼乔纳森·杰克逊约翰·奥斯丁
Owner MICROCHIP TECH INC
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