Dynamic bus inversion (DBI) for programmable levels of a ratio of ones and zeros. A transmitting device identifies a number and/or ratio of ones and zeros in a noninverted version of a signal to be transmitted (noninverted signal) and a number and/or ratio of ones and zeros in an inverted version of the signal (inverted signal). The transmitting device can calculate whether a difference of ones and zeros in the noninverted signal or a difference of ones and zeros in the inverted signal provides a calculated average ratio of ones to zeros closer to a target ratio. The transmitting device sends the signal that achieves provides the calculated average ratio closer to the target ratio.

The encoding method includes an encoding process of encoding a bit sequence to be transmitted, into a symbol sequence. The symbol sequence includes a plurality of symbols each having a signal level to which any one of 2.sup.n different values is allocated. n is an integer equal to or larger than 1. The encoding process includes encoding the bit sequence to be transmitted into the symbol sequence so that the symbol sequence does not include one or more prohibited patterns. The one or more prohibited patterns include one or more specific patterns which are one or more of patterns representing transition of signal levels of three or more consecutive symbols. The one or more specific patterns include one or more patterns in which signal levels of any two adjacent symbols of the three or more consecutive symbols are different values.

A data transmission circuit includes a data bus inversion encoding circuit configured to compare previous output data and current output data, invert or non-invert the current output data to control the number of data transitions; and transmitters configured to drive signal transmission lines based on outputs of the data bus inversion encoding circuit.

Dynamic bus inversion (DBI) for programmable levels of a ratio of ones and zeros. A transmitting device identifies a number and/or ratio of ones and zeros in a noninverted version of a signal to be transmitted (noninverted signal) and a number and/or ratio of ones and zeros in an inverted version of the signal (inverted signal). The transmitting device can calculate whether a difference of ones and zeros in the noninverted signal or a difference of ones and zeros in the inverted signal provides a calculated average ratio of ones to zeros closer to a target ratio. The transmitting device sends the signal that achieves provides the calculated average ratio closer to the target ratio.

In various embodiments, a system comprising a network interface, a processor, and a non-transient memory medium operatively coupled to the processor is disclosed. The memory medium is configured to store a plurality of instructions configured to program the processor to receive a digital bit stream, transform the digital bit stream to an encoded digital bit stream. The encoded digital bit stream comprises at least one of a gateway channel, a composite channel, or a data channel and any combination thereof, and provides the encoded digital bit stream to the network interface for transmission. A non-transitory computer-readable memory medium and a computer-implemented method are disclosed.

A method of performing multiple data bus inversion (DBI) and a memory device performing the method are provided. The multiple DBI includes first through third DBI operations, wherein the first DBI operation determines whether to perform data inversion on a first data inversion group in which MN data bits of a MN data bit structure are grouped and performs the data inversion on the first data inversion group, the second DBI operation determines whether to perform data inversion on second data inversion groups formed by grouping M data bits from among the MN data bits and performs the data inversion on the second data inversion groups, and the third DBI operation determines whether to perform data inversion on third data inversion groups formed by grouping N data bits from among the MN data bits and performs the data inversion on the third data inversion groups.

Dynamic bus inversion (DBI) for programmable levels of a ratio of ones and zeros. A transmitting device identifies a number and/or ratio of ones and zeros in a noninverted version of a signal to be transmitted (noninverted signal) and a number and/or ratio of ones and zeros in an inverted version of the signal (inverted signal). The transmitting device can calculate whether a difference of ones and zeros in the noninverted signal or a difference of ones and zeros in the inverted signal provides a calculated average ratio of ones to zeros closer to a target ratio. The transmitting device sends the signal that achieves provides the calculated average ratio closer to the target ratio.

Systems and methods for low-power single-wire communication are provided. In some embodiments, a method of operation of a transmitter to transmit a data word to a receiver using low-power single-wire communication includes receiving the data word to be transmitted to the receiver. The method also includes encoding the data word to be transmitted in a Pulsed Index Communication (PIC) format to produce a PIC data word and transmitting the PIC data word to the receiver. In this way, the transmitter may be able to transmit an increased amount of data while maintaining a simple communication protocol that uses low power and does not require a Clock-Data Recovery circuit.

A data transmission circuit includes a data bus inversion encoding circuit configured to compare previous output data and current output data, invert or non-invert the current output data to control the number of data transitions; and transmitters configured to drive signal transmission lines based on outputs of the data bus inversion encoding circuit.

In various embodiments, a system comprising a network interface, a processor, and a non-transient memory medium operatively coupled to the processor is disclosed. The memory medium is configured to store a plurality of instructions configured to program the processor to receive a digital bit stream, transform the digital bit stream to an encoded digital bit stream. The encoded digital bit stream comprises at least one of a gateway channel, a composite channel, or a data channel, and any combination thereof, and provides the encoded digital bit stream to the network interface for transmission. A non-transitory computer-readable memory medium and a computer-implemented method also are disclosed.