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  2. Parity bit - Wikipedia

    en.wikipedia.org/wiki/Parity_bit

    In the case of odd parity, the coding is reversed. For a given set of bits, if the count of bits with a value of 1 is even, the parity bit value is set to 1 making the total count of 1s in the whole set (including the parity bit) an odd number. If the count of bits with a value of 1 is odd, the count is already odd so the parity bit's value is 0.

  3. Error detection and correction - Wikipedia

    en.wikipedia.org/wiki/Error_detection_and_correction

    A parity bit is a bit that is added to a group of source bits to ensure that the number of set bits (i.e., bits with value 1) in the outcome is even or odd. It is a very simple scheme that can be used to detect single or any other odd number (i.e., three, five, etc.) of errors in the output.

  4. Hamming code - Wikipedia

    en.wikipedia.org/wiki/Hamming_code

    Each data bit is included in a unique set of 2 or more parity bits, as determined by the binary form of its bit position. Parity bit 1 covers all bit positions which have the least significant bit set: bit 1 (the parity bit itself), 3, 5, 7, 9, etc.

  5. Parity flag - Wikipedia

    en.wikipedia.org/wiki/Parity_flag

    It is normally a single bit in a processor status register. For example, assume a machine where a set parity flag indicates even parity. If the result of the last operation were 26 (11010 in binary), the parity flag would be 0 since the number of set bits is odd. Similarly, if the result were 10 (1010 in binary) then the parity flag would be 1.

  6. RAM parity - Wikipedia

    en.wikipedia.org/wiki/RAM_parity

    Logic parity RAM recalculates an always-valid parity bit each time a byte is read from memory, instead of storing the parity bit when the memory is written to; the calculated parity bit, which will not reveal if the data has been corrupted (hence the name "fake parity"), is presented to the parity-checking logic.

  7. Serial port - Wikipedia

    en.wikipedia.org/wiki/Serial_port

    The parity bit in each character can be set to one of the following: None (N) means that no parity bit is sent and the transmission is shortened. Odd (O) means that the parity bit is set so that the number of 1 bits is odd. Even (E) means that the parity bit is set so that the number of 1 bits is even.

  8. ARINC 429 - Wikipedia

    en.wikipedia.org/wiki/ARINC_429

    Bit 32 is the parity bit, and is used to verify that the word was not damaged or garbled during transmission. Every ARINC 429 channel typically uses "odd" parity - there must be an odd number of "1" bits in the word. This bit is set to 0 or 1 to ensure that the correct number of bits are set to 1 in the word.

  9. Universal asynchronous receiver-transmitter - Wikipedia

    en.wikipedia.org/wiki/Universal_asynchronous...

    In this diagram, one byte is sent, consisting of a start bit, followed by eight data bits (D1-8), and two stop bits, for a 11-bit UART frame. The number of data and formatting bits, the presence or absence of a parity bit, the form of parity (even or odd) and the transmission speed must be pre-agreed by the communicating parties.